diff --git a/homeassistant/components/air_quality/__init__.py b/homeassistant/components/air_quality/__init__.py
index 9a80ee39e86..605a34a69e0 100644
--- a/homeassistant/components/air_quality/__init__.py
+++ b/homeassistant/components/air_quality/__init__.py
@@ -13,11 +13,13 @@ from homeassistant.helpers import config_validation as cv
 from homeassistant.helpers.entity import Entity
 from homeassistant.helpers.entity_component import EntityComponent
 from homeassistant.helpers.typing import ConfigType, StateType
+from homeassistant.util.hass_dict import HassKey
 
 from .const import DOMAIN
 
 _LOGGER: Final = logging.getLogger(__name__)
 
+DOMAIN_DATA: HassKey[EntityComponent[AirQualityEntity]] = HassKey(DOMAIN)
 ENTITY_ID_FORMAT: Final = DOMAIN + ".{}"
 PLATFORM_SCHEMA = cv.PLATFORM_SCHEMA
 PLATFORM_SCHEMA_BASE = cv.PLATFORM_SCHEMA_BASE
@@ -54,7 +56,7 @@ PROP_TO_ATTR: Final[dict[str, str]] = {
 
 async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     """Set up the air quality component."""
-    component = hass.data[DOMAIN] = EntityComponent[AirQualityEntity](
+    component = hass.data[DOMAIN_DATA] = EntityComponent[AirQualityEntity](
         _LOGGER, DOMAIN, hass, SCAN_INTERVAL
     )
     await component.async_setup(config)
@@ -63,14 +65,12 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Set up a config entry."""
-    component: EntityComponent[AirQualityEntity] = hass.data[DOMAIN]
-    return await component.async_setup_entry(entry)
+    return await hass.data[DOMAIN_DATA].async_setup_entry(entry)
 
 
 async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Unload a config entry."""
-    component: EntityComponent[AirQualityEntity] = hass.data[DOMAIN]
-    return await component.async_unload_entry(entry)
+    return await hass.data[DOMAIN_DATA].async_unload_entry(entry)
 
 
 class AirQualityEntity(Entity):
diff --git a/homeassistant/components/alarm_control_panel/__init__.py b/homeassistant/components/alarm_control_panel/__init__.py
index b09d5867d26..91d3a83df8e 100644
--- a/homeassistant/components/alarm_control_panel/__init__.py
+++ b/homeassistant/components/alarm_control_panel/__init__.py
@@ -33,6 +33,7 @@ from homeassistant.helpers.deprecation import (
 from homeassistant.helpers.entity import Entity, EntityDescription
 from homeassistant.helpers.entity_component import EntityComponent
 from homeassistant.helpers.typing import ConfigType
+from homeassistant.util.hass_dict import HassKey
 
 from .const import (  # noqa: F401
     _DEPRECATED_FORMAT_NUMBER,
@@ -52,6 +53,7 @@ from .const import (  # noqa: F401
 
 _LOGGER: Final = logging.getLogger(__name__)
 
+DOMAIN_DATA: HassKey[EntityComponent[AlarmControlPanelEntity]] = HassKey(DOMAIN)
 ENTITY_ID_FORMAT: Final = DOMAIN + ".{}"
 PLATFORM_SCHEMA: Final = cv.PLATFORM_SCHEMA
 PLATFORM_SCHEMA_BASE: Final = cv.PLATFORM_SCHEMA_BASE
@@ -69,7 +71,7 @@ ALARM_SERVICE_SCHEMA: Final = make_entity_service_schema(
 
 async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     """Track states and offer events for sensors."""
-    component = hass.data[DOMAIN] = EntityComponent[AlarmControlPanelEntity](
+    component = hass.data[DOMAIN_DATA] = EntityComponent[AlarmControlPanelEntity](
         _LOGGER, DOMAIN, hass, SCAN_INTERVAL
     )
 
@@ -122,14 +124,12 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Set up a config entry."""
-    component: EntityComponent[AlarmControlPanelEntity] = hass.data[DOMAIN]
-    return await component.async_setup_entry(entry)
+    return await hass.data[DOMAIN_DATA].async_setup_entry(entry)
 
 
 async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Unload a config entry."""
-    component: EntityComponent[AlarmControlPanelEntity] = hass.data[DOMAIN]
-    return await component.async_unload_entry(entry)
+    return await hass.data[DOMAIN_DATA].async_unload_entry(entry)
 
 
 class AlarmControlPanelEntityDescription(EntityDescription, frozen_or_thawed=True):
diff --git a/homeassistant/components/assist_satellite/__init__.py b/homeassistant/components/assist_satellite/__init__.py
index 2d4459ffd8c..77c9d8e678a 100644
--- a/homeassistant/components/assist_satellite/__init__.py
+++ b/homeassistant/components/assist_satellite/__init__.py
@@ -10,7 +10,7 @@ from homeassistant.helpers import config_validation as cv
 from homeassistant.helpers.entity_component import EntityComponent
 from homeassistant.helpers.typing import ConfigType
 
-from .const import DOMAIN, AssistSatelliteEntityFeature
+from .const import DOMAIN, DOMAIN_DATA, AssistSatelliteEntityFeature
 from .entity import (
     AssistSatelliteConfiguration,
     AssistSatelliteEntity,
@@ -36,7 +36,7 @@ PLATFORM_SCHEMA_BASE = cv.PLATFORM_SCHEMA_BASE
 
 
 async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
-    component = hass.data[DOMAIN] = EntityComponent[AssistSatelliteEntity](
+    component = hass.data[DOMAIN_DATA] = EntityComponent[AssistSatelliteEntity](
         _LOGGER, DOMAIN, hass
     )
     await component.async_setup(config)
@@ -62,11 +62,9 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Set up a config entry."""
-    component: EntityComponent[AssistSatelliteEntity] = hass.data[DOMAIN]
-    return await component.async_setup_entry(entry)
+    return await hass.data[DOMAIN_DATA].async_setup_entry(entry)
 
 
 async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Unload a config entry."""
-    component: EntityComponent[AssistSatelliteEntity] = hass.data[DOMAIN]
-    return await component.async_unload_entry(entry)
+    return await hass.data[DOMAIN_DATA].async_unload_entry(entry)
diff --git a/homeassistant/components/assist_satellite/const.py b/homeassistant/components/assist_satellite/const.py
index 3a9ce896fb2..bd5453e06de 100644
--- a/homeassistant/components/assist_satellite/const.py
+++ b/homeassistant/components/assist_satellite/const.py
@@ -1,9 +1,21 @@
 """Constants for assist satellite."""
 
+from __future__ import annotations
+
 from enum import IntFlag
+from typing import TYPE_CHECKING
+
+from homeassistant.util.hass_dict import HassKey
+
+if TYPE_CHECKING:
+    from homeassistant.helpers.entity_component import EntityComponent
+
+    from .entity import AssistSatelliteEntity
 
 DOMAIN = "assist_satellite"
 
+DOMAIN_DATA: HassKey[EntityComponent[AssistSatelliteEntity]] = HassKey(DOMAIN)
+
 
 class AssistSatelliteEntityFeature(IntFlag):
     """Supported features of Assist satellite entity."""
diff --git a/homeassistant/components/assist_satellite/websocket_api.py b/homeassistant/components/assist_satellite/websocket_api.py
index 0d7a434dba5..ee7bef7e4e8 100644
--- a/homeassistant/components/assist_satellite/websocket_api.py
+++ b/homeassistant/components/assist_satellite/websocket_api.py
@@ -9,10 +9,8 @@ from homeassistant.components import websocket_api
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.exceptions import HomeAssistantError
 from homeassistant.helpers import config_validation as cv
-from homeassistant.helpers.entity_component import EntityComponent
 
-from .const import DOMAIN
-from .entity import AssistSatelliteEntity
+from .const import DOMAIN, DOMAIN_DATA
 
 
 @callback
@@ -38,8 +36,7 @@ async def websocket_intercept_wake_word(
     msg: dict[str, Any],
 ) -> None:
     """Intercept the next wake word from a satellite."""
-    component: EntityComponent[AssistSatelliteEntity] = hass.data[DOMAIN]
-    satellite = component.get_entity(msg["entity_id"])
+    satellite = hass.data[DOMAIN_DATA].get_entity(msg["entity_id"])
     if satellite is None:
         connection.send_error(
             msg["id"], websocket_api.ERR_NOT_FOUND, "Entity not found"
@@ -77,8 +74,7 @@ def websocket_get_configuration(
     msg: dict[str, Any],
 ) -> None:
     """Get the current satellite configuration."""
-    component: EntityComponent[AssistSatelliteEntity] = hass.data[DOMAIN]
-    satellite = component.get_entity(msg["entity_id"])
+    satellite = hass.data[DOMAIN_DATA].get_entity(msg["entity_id"])
     if satellite is None:
         connection.send_error(
             msg["id"], websocket_api.ERR_NOT_FOUND, "Entity not found"
@@ -108,8 +104,7 @@ async def websocket_set_wake_words(
     msg: dict[str, Any],
 ) -> None:
     """Set the active wake words for the satellite."""
-    component: EntityComponent[AssistSatelliteEntity] = hass.data[DOMAIN]
-    satellite = component.get_entity(msg["entity_id"])
+    satellite = hass.data[DOMAIN_DATA].get_entity(msg["entity_id"])
     if satellite is None:
         connection.send_error(
             msg["id"], websocket_api.ERR_NOT_FOUND, "Entity not found"
diff --git a/homeassistant/components/automation/__init__.py b/homeassistant/components/automation/__init__.py
index dacbe074e95..1db5125a8a6 100644
--- a/homeassistant/components/automation/__init__.py
+++ b/homeassistant/components/automation/__init__.py
@@ -94,6 +94,7 @@ from homeassistant.helpers.trigger import (
 from homeassistant.helpers.typing import ConfigType
 from homeassistant.loader import bind_hass
 from homeassistant.util.dt import parse_datetime
+from homeassistant.util.hass_dict import HassKey
 
 from .config import AutomationConfig, ValidationStatus
 from .const import (
@@ -109,6 +110,7 @@ from .const import (
 from .helpers import async_get_blueprints
 from .trace import trace_automation
 
+DOMAIN_DATA: HassKey[EntityComponent[BaseAutomationEntity]] = HassKey(DOMAIN)
 ENTITY_ID_FORMAT = DOMAIN + ".{}"
 
 
@@ -161,14 +163,12 @@ def _automations_with_x(
     hass: HomeAssistant, referenced_id: str, property_name: str
 ) -> list[str]:
     """Return all automations that reference the x."""
-    if DOMAIN not in hass.data:
+    if DOMAIN_DATA not in hass.data:
         return []
 
-    component: EntityComponent[BaseAutomationEntity] = hass.data[DOMAIN]
-
     return [
         automation_entity.entity_id
-        for automation_entity in component.entities
+        for automation_entity in hass.data[DOMAIN_DATA].entities
         if referenced_id in getattr(automation_entity, property_name)
     ]
 
@@ -177,12 +177,10 @@ def _x_in_automation(
     hass: HomeAssistant, entity_id: str, property_name: str
 ) -> list[str]:
     """Return all x in an automation."""
-    if DOMAIN not in hass.data:
+    if DOMAIN_DATA not in hass.data:
         return []
 
-    component: EntityComponent[BaseAutomationEntity] = hass.data[DOMAIN]
-
-    if (automation_entity := component.get_entity(entity_id)) is None:
+    if (automation_entity := hass.data[DOMAIN_DATA].get_entity(entity_id)) is None:
         return []
 
     return list(getattr(automation_entity, property_name))
@@ -254,11 +252,9 @@ def automations_with_blueprint(hass: HomeAssistant, blueprint_path: str) -> list
     if DOMAIN not in hass.data:
         return []
 
-    component: EntityComponent[BaseAutomationEntity] = hass.data[DOMAIN]
-
     return [
         automation_entity.entity_id
-        for automation_entity in component.entities
+        for automation_entity in hass.data[DOMAIN_DATA].entities
         if automation_entity.referenced_blueprint == blueprint_path
     ]
 
@@ -266,12 +262,10 @@ def automations_with_blueprint(hass: HomeAssistant, blueprint_path: str) -> list
 @callback
 def blueprint_in_automation(hass: HomeAssistant, entity_id: str) -> str | None:
     """Return the blueprint the automation is based on or None."""
-    if DOMAIN not in hass.data:
+    if DOMAIN_DATA not in hass.data:
         return None
 
-    component: EntityComponent[BaseAutomationEntity] = hass.data[DOMAIN]
-
-    if (automation_entity := component.get_entity(entity_id)) is None:
+    if (automation_entity := hass.data[DOMAIN_DATA].get_entity(entity_id)) is None:
         return None
 
     return automation_entity.referenced_blueprint
@@ -279,7 +273,7 @@ def blueprint_in_automation(hass: HomeAssistant, entity_id: str) -> str | None:
 
 async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     """Set up all automations."""
-    hass.data[DOMAIN] = component = EntityComponent[BaseAutomationEntity](
+    hass.data[DOMAIN_DATA] = component = EntityComponent[BaseAutomationEntity](
         LOGGER, DOMAIN, hass
     )
 
@@ -1210,9 +1204,7 @@ def websocket_config(
     msg: dict[str, Any],
 ) -> None:
     """Get automation config."""
-    component: EntityComponent[BaseAutomationEntity] = hass.data[DOMAIN]
-
-    automation = component.get_entity(msg["entity_id"])
+    automation = hass.data[DOMAIN_DATA].get_entity(msg["entity_id"])
 
     if automation is None:
         connection.send_error(
diff --git a/homeassistant/components/binary_sensor/__init__.py b/homeassistant/components/binary_sensor/__init__.py
index 0b3e423e339..5ed6014030f 100644
--- a/homeassistant/components/binary_sensor/__init__.py
+++ b/homeassistant/components/binary_sensor/__init__.py
@@ -24,10 +24,12 @@ from homeassistant.helpers.deprecation import (
 from homeassistant.helpers.entity import Entity, EntityDescription
 from homeassistant.helpers.entity_component import EntityComponent
 from homeassistant.helpers.typing import ConfigType
+from homeassistant.util.hass_dict import HassKey
 
 _LOGGER = logging.getLogger(__name__)
 
 DOMAIN = "binary_sensor"
+DOMAIN_DATA: HassKey[EntityComponent[BinarySensorEntity]] = HassKey(DOMAIN)
 ENTITY_ID_FORMAT = DOMAIN + ".{}"
 PLATFORM_SCHEMA = cv.PLATFORM_SCHEMA
 PLATFORM_SCHEMA_BASE = cv.PLATFORM_SCHEMA_BASE
@@ -217,7 +219,7 @@ _DEPRECATED_DEVICE_CLASS_WINDOW = DeprecatedConstantEnum(
 
 async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     """Track states and offer events for binary sensors."""
-    component = hass.data[DOMAIN] = EntityComponent[BinarySensorEntity](
+    component = hass.data[DOMAIN_DATA] = EntityComponent[BinarySensorEntity](
         logging.getLogger(__name__), DOMAIN, hass, SCAN_INTERVAL
     )
 
@@ -227,14 +229,12 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Set up a config entry."""
-    component: EntityComponent[BinarySensorEntity] = hass.data[DOMAIN]
-    return await component.async_setup_entry(entry)
+    return await hass.data[DOMAIN_DATA].async_setup_entry(entry)
 
 
 async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Unload a config entry."""
-    component: EntityComponent[BinarySensorEntity] = hass.data[DOMAIN]
-    return await component.async_unload_entry(entry)
+    return await hass.data[DOMAIN_DATA].async_unload_entry(entry)
 
 
 class BinarySensorEntityDescription(EntityDescription, frozen_or_thawed=True):
diff --git a/homeassistant/components/button/__init__.py b/homeassistant/components/button/__init__.py
index 3955fabdf00..614a6e6dba3 100644
--- a/homeassistant/components/button/__init__.py
+++ b/homeassistant/components/button/__init__.py
@@ -19,11 +19,13 @@ from homeassistant.helpers.entity_component import EntityComponent
 from homeassistant.helpers.restore_state import RestoreEntity
 from homeassistant.helpers.typing import ConfigType
 from homeassistant.util import dt as dt_util
+from homeassistant.util.hass_dict import HassKey
 
 from .const import DOMAIN, SERVICE_PRESS
 
 _LOGGER = logging.getLogger(__name__)
 
+DOMAIN_DATA: HassKey[EntityComponent[ButtonEntity]] = HassKey(DOMAIN)
 ENTITY_ID_FORMAT = DOMAIN + ".{}"
 PLATFORM_SCHEMA = cv.PLATFORM_SCHEMA
 PLATFORM_SCHEMA_BASE = cv.PLATFORM_SCHEMA_BASE
@@ -47,7 +49,7 @@ DEVICE_CLASSES_SCHEMA = vol.All(vol.Lower, vol.Coerce(ButtonDeviceClass))
 
 async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     """Set up Button entities."""
-    component = hass.data[DOMAIN] = EntityComponent[ButtonEntity](
+    component = hass.data[DOMAIN_DATA] = EntityComponent[ButtonEntity](
         _LOGGER, DOMAIN, hass, SCAN_INTERVAL
     )
     await component.async_setup(config)
@@ -63,14 +65,12 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Set up a config entry."""
-    component: EntityComponent[ButtonEntity] = hass.data[DOMAIN]
-    return await component.async_setup_entry(entry)
+    return await hass.data[DOMAIN_DATA].async_setup_entry(entry)
 
 
 async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Unload a config entry."""
-    component: EntityComponent[ButtonEntity] = hass.data[DOMAIN]
-    return await component.async_unload_entry(entry)
+    return await hass.data[DOMAIN_DATA].async_unload_entry(entry)
 
 
 class ButtonEntityDescription(EntityDescription, frozen_or_thawed=True):
diff --git a/homeassistant/components/calendar/__init__.py b/homeassistant/components/calendar/__init__.py
index 3e33f077e93..e1f206ca661 100644
--- a/homeassistant/components/calendar/__init__.py
+++ b/homeassistant/components/calendar/__init__.py
@@ -43,6 +43,8 @@ from homeassistant.util.json import JsonValueType
 
 from .const import (
     CONF_EVENT,
+    DOMAIN,
+    DOMAIN_DATA,
     EVENT_DESCRIPTION,
     EVENT_DURATION,
     EVENT_END,
@@ -70,7 +72,6 @@ from .const import (
 
 _LOGGER = logging.getLogger(__name__)
 
-DOMAIN = "calendar"
 ENTITY_ID_FORMAT = DOMAIN + ".{}"
 PLATFORM_SCHEMA = cv.PLATFORM_SCHEMA
 PLATFORM_SCHEMA_BASE = cv.PLATFORM_SCHEMA_BASE
@@ -285,7 +286,7 @@ SERVICE_GET_EVENTS_SCHEMA: Final = vol.All(
 
 async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     """Track states and offer events for calendars."""
-    component = hass.data[DOMAIN] = EntityComponent[CalendarEntity](
+    component = hass.data[DOMAIN_DATA] = EntityComponent[CalendarEntity](
         _LOGGER, DOMAIN, hass, SCAN_INTERVAL
     )
 
@@ -318,14 +319,12 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Set up a config entry."""
-    component: EntityComponent[CalendarEntity] = hass.data[DOMAIN]
-    return await component.async_setup_entry(entry)
+    return await hass.data[DOMAIN_DATA].async_setup_entry(entry)
 
 
 async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Unload a config entry."""
-    component: EntityComponent[CalendarEntity] = hass.data[DOMAIN]
-    return await component.async_unload_entry(entry)
+    return await hass.data[DOMAIN_DATA].async_unload_entry(entry)
 
 
 def get_date(date: dict[str, Any]) -> datetime.datetime:
@@ -702,8 +701,7 @@ async def handle_calendar_event_create(
     hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
 ) -> None:
     """Handle creation of a calendar event."""
-    component: EntityComponent[CalendarEntity] = hass.data[DOMAIN]
-    if not (entity := component.get_entity(msg["entity_id"])):
+    if not (entity := hass.data[DOMAIN_DATA].get_entity(msg["entity_id"])):
         connection.send_error(msg["id"], ERR_NOT_FOUND, "Entity not found")
         return
 
@@ -743,8 +741,7 @@ async def handle_calendar_event_delete(
 ) -> None:
     """Handle delete of a calendar event."""
 
-    component: EntityComponent[CalendarEntity] = hass.data[DOMAIN]
-    if not (entity := component.get_entity(msg["entity_id"])):
+    if not (entity := hass.data[DOMAIN_DATA].get_entity(msg["entity_id"])):
         connection.send_error(msg["id"], ERR_NOT_FOUND, "Entity not found")
         return
 
@@ -789,8 +786,7 @@ async def handle_calendar_event_update(
     hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
 ) -> None:
     """Handle creation of a calendar event."""
-    component: EntityComponent[CalendarEntity] = hass.data[DOMAIN]
-    if not (entity := component.get_entity(msg["entity_id"])):
+    if not (entity := hass.data[DOMAIN_DATA].get_entity(msg["entity_id"])):
         connection.send_error(msg["id"], ERR_NOT_FOUND, "Entity not found")
         return
 
diff --git a/homeassistant/components/calendar/const.py b/homeassistant/components/calendar/const.py
index e667510325b..6266a604c81 100644
--- a/homeassistant/components/calendar/const.py
+++ b/homeassistant/components/calendar/const.py
@@ -1,6 +1,19 @@
 """Constants for calendar components."""
 
+from __future__ import annotations
+
 from enum import IntFlag
+from typing import TYPE_CHECKING
+
+from homeassistant.util.hass_dict import HassKey
+
+if TYPE_CHECKING:
+    from homeassistant.helpers.entity_component import EntityComponent
+
+    from . import CalendarEntity
+
+DOMAIN = "calendar"
+DOMAIN_DATA: HassKey[EntityComponent[CalendarEntity]] = HassKey(DOMAIN)
 
 CONF_EVENT = "event"
 
diff --git a/homeassistant/components/calendar/trigger.py b/homeassistant/components/calendar/trigger.py
index 523a634704c..4daa32f7fc7 100644
--- a/homeassistant/components/calendar/trigger.py
+++ b/homeassistant/components/calendar/trigger.py
@@ -23,7 +23,8 @@ from homeassistant.helpers.trigger import TriggerActionType, TriggerInfo
 from homeassistant.helpers.typing import ConfigType
 from homeassistant.util import dt as dt_util
 
-from . import DOMAIN, CalendarEntity, CalendarEvent
+from . import CalendarEntity, CalendarEvent
+from .const import DOMAIN, DOMAIN_DATA
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -94,7 +95,7 @@ type QueuedEventFetcher = Callable[[Timespan], Awaitable[list[QueuedCalendarEven
 
 def get_entity(hass: HomeAssistant, entity_id: str) -> CalendarEntity:
     """Get the calendar entity for the provided entity_id."""
-    component: EntityComponent[CalendarEntity] = hass.data[DOMAIN]
+    component: EntityComponent[CalendarEntity] = hass.data[DOMAIN_DATA]
     if not (entity := component.get_entity(entity_id)) or not isinstance(
         entity, CalendarEntity
     ):
diff --git a/homeassistant/components/camera/__init__.py b/homeassistant/components/camera/__init__.py
index 859ced1ba86..14f884c1750 100644
--- a/homeassistant/components/camera/__init__.py
+++ b/homeassistant/components/camera/__init__.py
@@ -73,6 +73,7 @@ from .const import (  # noqa: F401
     DATA_CAMERA_PREFS,
     DATA_RTSP_TO_WEB_RTC,
     DOMAIN,
+    DOMAIN_DATA,
     PREF_ORIENTATION,
     PREF_PRELOAD_STREAM,
     SERVICE_RECORD,
@@ -362,7 +363,7 @@ def async_register_rtsp_to_web_rtc_provider(
 async def _async_refresh_providers(hass: HomeAssistant) -> None:
     """Check all cameras for any state changes for registered providers."""
 
-    component: EntityComponent[Camera] = hass.data[DOMAIN]
+    component = hass.data[DOMAIN_DATA]
     await asyncio.gather(
         *(camera.async_refresh_providers() for camera in component.entities)
     )
@@ -380,7 +381,7 @@ def _async_get_rtsp_to_web_rtc_providers(
 
 async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     """Set up the camera component."""
-    component = hass.data[DOMAIN] = EntityComponent[Camera](
+    component = hass.data[DOMAIN_DATA] = EntityComponent[Camera](
         _LOGGER, DOMAIN, hass, SCAN_INTERVAL
     )
 
@@ -455,14 +456,12 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Set up a config entry."""
-    component: EntityComponent[Camera] = hass.data[DOMAIN]
-    return await component.async_setup_entry(entry)
+    return await hass.data[DOMAIN_DATA].async_setup_entry(entry)
 
 
 async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Unload a config entry."""
-    component: EntityComponent[Camera] = hass.data[DOMAIN]
-    return await component.async_unload_entry(entry)
+    return await hass.data[DOMAIN_DATA].async_unload_entry(entry)
 
 
 CACHED_PROPERTIES_WITH_ATTR_ = {
diff --git a/homeassistant/components/camera/const.py b/homeassistant/components/camera/const.py
index ad863f374d1..d6a2372ffc1 100644
--- a/homeassistant/components/camera/const.py
+++ b/homeassistant/components/camera/const.py
@@ -1,8 +1,10 @@
 """Constants for Camera component."""
 
+from __future__ import annotations
+
 from enum import StrEnum
 from functools import partial
-from typing import Final
+from typing import TYPE_CHECKING, Final
 
 from homeassistant.helpers.deprecation import (
     DeprecatedConstantEnum,
@@ -10,8 +12,15 @@ from homeassistant.helpers.deprecation import (
     check_if_deprecated_constant,
     dir_with_deprecated_constants,
 )
+from homeassistant.util.hass_dict import HassKey
+
+if TYPE_CHECKING:
+    from homeassistant.helpers.entity_component import EntityComponent
+
+    from . import Camera
 
 DOMAIN: Final = "camera"
+DOMAIN_DATA: HassKey[EntityComponent[Camera]] = HassKey(DOMAIN)
 
 DATA_CAMERA_PREFS: Final = "camera_prefs"
 DATA_RTSP_TO_WEB_RTC: Final = "rtsp_to_web_rtc"
diff --git a/homeassistant/components/camera/media_source.py b/homeassistant/components/camera/media_source.py
index 958235c684d..00c0e83b46f 100644
--- a/homeassistant/components/camera/media_source.py
+++ b/homeassistant/components/camera/media_source.py
@@ -16,10 +16,9 @@ from homeassistant.components.stream import FORMAT_CONTENT_TYPE, HLS_PROVIDER
 from homeassistant.const import ATTR_FRIENDLY_NAME
 from homeassistant.core import HomeAssistant
 from homeassistant.exceptions import HomeAssistantError
-from homeassistant.helpers.entity_component import EntityComponent
 
 from . import Camera, _async_stream_endpoint_url
-from .const import DOMAIN, StreamType
+from .const import DOMAIN, DOMAIN_DATA, StreamType
 
 
 async def async_get_media_source(hass: HomeAssistant) -> CameraMediaSource:
@@ -59,7 +58,7 @@ class CameraMediaSource(MediaSource):
 
     async def async_resolve_media(self, item: MediaSourceItem) -> PlayMedia:
         """Resolve media to a url."""
-        component: EntityComponent[Camera] = self.hass.data[DOMAIN]
+        component = self.hass.data[DOMAIN_DATA]
         camera = component.get_entity(item.identifier)
 
         if not camera:
@@ -108,7 +107,7 @@ class CameraMediaSource(MediaSource):
 
             return _media_source_for_camera(self.hass, camera, content_type)
 
-        component: EntityComponent[Camera] = self.hass.data[DOMAIN]
+        component = self.hass.data[DOMAIN_DATA]
         results = await asyncio.gather(
             *(_filter_browsable_camera(camera) for camera in component.entities),
             return_exceptions=True,
diff --git a/homeassistant/components/climate/__init__.py b/homeassistant/components/climate/__init__.py
index 7b016d9c90b..7213a2ebca0 100644
--- a/homeassistant/components/climate/__init__.py
+++ b/homeassistant/components/climate/__init__.py
@@ -37,6 +37,7 @@ from homeassistant.helpers.entity_platform import EntityPlatform
 from homeassistant.helpers.temperature import display_temp as show_temp
 from homeassistant.helpers.typing import ConfigType
 from homeassistant.loader import async_get_issue_tracker, async_suggest_report_issue
+from homeassistant.util.hass_dict import HassKey
 from homeassistant.util.unit_conversion import TemperatureConverter
 
 from .const import (  # noqa: F401
@@ -114,6 +115,7 @@ from .const import (  # noqa: F401
 
 _LOGGER = logging.getLogger(__name__)
 
+DOMAIN_DATA: HassKey[EntityComponent[ClimateEntity]] = HassKey(DOMAIN)
 ENTITY_ID_FORMAT = DOMAIN + ".{}"
 PLATFORM_SCHEMA = cv.PLATFORM_SCHEMA
 PLATFORM_SCHEMA_BASE = cv.PLATFORM_SCHEMA_BASE
@@ -150,7 +152,7 @@ SET_TEMPERATURE_SCHEMA = vol.All(
 
 async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     """Set up climate entities."""
-    component = hass.data[DOMAIN] = EntityComponent[ClimateEntity](
+    component = hass.data[DOMAIN_DATA] = EntityComponent[ClimateEntity](
         _LOGGER, DOMAIN, hass, SCAN_INTERVAL
     )
     await component.async_setup(config)
@@ -223,14 +225,12 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Set up a config entry."""
-    component: EntityComponent[ClimateEntity] = hass.data[DOMAIN]
-    return await component.async_setup_entry(entry)
+    return await hass.data[DOMAIN_DATA].async_setup_entry(entry)
 
 
 async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Unload a config entry."""
-    component: EntityComponent[ClimateEntity] = hass.data[DOMAIN]
-    return await component.async_unload_entry(entry)
+    return await hass.data[DOMAIN_DATA].async_unload_entry(entry)
 
 
 class ClimateEntityDescription(EntityDescription, frozen_or_thawed=True):
diff --git a/homeassistant/components/conversation/__init__.py b/homeassistant/components/conversation/__init__.py
index 2e06387765b..983d2074ab5 100644
--- a/homeassistant/components/conversation/__init__.py
+++ b/homeassistant/components/conversation/__init__.py
@@ -36,6 +36,7 @@ from .const import (
     ATTR_LANGUAGE,
     ATTR_TEXT,
     DOMAIN,
+    DOMAIN_DATA,
     HOME_ASSISTANT_AGENT,
     OLD_HOME_ASSISTANT_AGENT,
     SERVICE_PROCESS,
@@ -132,7 +133,6 @@ def async_get_conversation_languages(
     all conversation agents.
     """
     agent_manager = get_agent_manager(hass)
-    entity_component: EntityComponent[ConversationEntity] = hass.data[DOMAIN]
     agents: list[ConversationEntity | AbstractConversationAgent]
 
     if agent_id:
@@ -148,7 +148,7 @@ def async_get_conversation_languages(
         agents = [agent]
 
     else:
-        agents = list(entity_component.entities)
+        agents = list(hass.data[DOMAIN_DATA].entities)
         for info in agent_manager.async_get_agent_info():
             agent = agent_manager.async_get_agent(info.id)
             assert agent is not None
@@ -208,10 +208,8 @@ async def async_prepare_agent(
 
 async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     """Register the process service."""
-    entity_component: EntityComponent[ConversationEntity] = EntityComponent(
-        _LOGGER, DOMAIN, hass
-    )
-    hass.data[DOMAIN] = entity_component
+    entity_component = EntityComponent[ConversationEntity](_LOGGER, DOMAIN, hass)
+    hass.data[DOMAIN_DATA] = entity_component
 
     await async_setup_default_agent(
         hass, entity_component, config.get(DOMAIN, {}).get("intents", {})
@@ -269,11 +267,9 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Set up a config entry."""
-    component: EntityComponent[ConversationEntity] = hass.data[DOMAIN]
-    return await component.async_setup_entry(entry)
+    return await hass.data[DOMAIN_DATA].async_setup_entry(entry)
 
 
 async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Unload a config entry."""
-    component: EntityComponent[ConversationEntity] = hass.data[DOMAIN]
-    return await component.async_unload_entry(entry)
+    return await hass.data[DOMAIN_DATA].async_unload_entry(entry)
diff --git a/homeassistant/components/conversation/agent_manager.py b/homeassistant/components/conversation/agent_manager.py
index 8202b9a0ed4..ae7d9551140 100644
--- a/homeassistant/components/conversation/agent_manager.py
+++ b/homeassistant/components/conversation/agent_manager.py
@@ -10,9 +10,8 @@ import voluptuous as vol
 
 from homeassistant.core import Context, HomeAssistant, async_get_hass, callback
 from homeassistant.helpers import config_validation as cv, singleton
-from homeassistant.helpers.entity_component import EntityComponent
 
-from .const import DOMAIN, HOME_ASSISTANT_AGENT, OLD_HOME_ASSISTANT_AGENT
+from .const import DOMAIN_DATA, HOME_ASSISTANT_AGENT, OLD_HOME_ASSISTANT_AGENT
 from .default_agent import async_get_default_agent
 from .entity import ConversationEntity
 from .models import (
@@ -54,8 +53,7 @@ def async_get_agent(
         return async_get_default_agent(hass)
 
     if "." in agent_id:
-        entity_component: EntityComponent[ConversationEntity] = hass.data[DOMAIN]
-        return entity_component.get_entity(agent_id)
+        return hass.data[DOMAIN_DATA].get_entity(agent_id)
 
     manager = get_agent_manager(hass)
 
diff --git a/homeassistant/components/conversation/const.py b/homeassistant/components/conversation/const.py
index 14b2d1d4955..b7e45142f8f 100644
--- a/homeassistant/components/conversation/const.py
+++ b/homeassistant/components/conversation/const.py
@@ -1,6 +1,16 @@
 """Const for conversation integration."""
 
+from __future__ import annotations
+
 from enum import IntFlag
+from typing import TYPE_CHECKING
+
+from homeassistant.util.hass_dict import HassKey
+
+if TYPE_CHECKING:
+    from homeassistant.helpers.entity_component import EntityComponent
+
+    from .entity import ConversationEntity
 
 DOMAIN = "conversation"
 DEFAULT_EXPOSED_ATTRIBUTES = {"device_class"}
@@ -15,6 +25,8 @@ ATTR_CONVERSATION_ID = "conversation_id"
 SERVICE_PROCESS = "process"
 SERVICE_RELOAD = "reload"
 
+DOMAIN_DATA: HassKey[EntityComponent[ConversationEntity]] = HassKey(DOMAIN)
+
 
 class ConversationEntityFeature(IntFlag):
     """Supported features of the conversation entity."""
diff --git a/homeassistant/components/conversation/http.py b/homeassistant/components/conversation/http.py
index 591298cbac1..982575b9957 100644
--- a/homeassistant/components/conversation/http.py
+++ b/homeassistant/components/conversation/http.py
@@ -19,7 +19,6 @@ from homeassistant.components.http.data_validator import RequestDataValidator
 from homeassistant.const import MATCH_ALL
 from homeassistant.core import HomeAssistant, State, callback
 from homeassistant.helpers import config_validation as cv, intent
-from homeassistant.helpers.entity_component import EntityComponent
 from homeassistant.util import language as language_util
 
 from .agent_manager import (
@@ -28,7 +27,7 @@ from .agent_manager import (
     async_get_agent,
     get_agent_manager,
 )
-from .const import DOMAIN
+from .const import DOMAIN_DATA
 from .default_agent import (
     METADATA_CUSTOM_FILE,
     METADATA_CUSTOM_SENTENCE,
@@ -113,13 +112,11 @@ async def websocket_list_agents(
     hass: HomeAssistant, connection: websocket_api.ActiveConnection, msg: dict
 ) -> None:
     """List conversation agents and, optionally, if they support a given language."""
-    entity_component: EntityComponent[ConversationEntity] = hass.data[DOMAIN]
-
     country = msg.get("country")
     language = msg.get("language")
     agents = []
 
-    for entity in entity_component.entities:
+    for entity in hass.data[DOMAIN_DATA].entities:
         supported_languages = entity.supported_languages
         if language and supported_languages != MATCH_ALL:
             supported_languages = language_util.matches(
diff --git a/homeassistant/components/cover/__init__.py b/homeassistant/components/cover/__init__.py
index d2ec6bee8fa..d64358896ba 100644
--- a/homeassistant/components/cover/__init__.py
+++ b/homeassistant/components/cover/__init__.py
@@ -41,11 +41,13 @@ from homeassistant.helpers.entity import Entity, EntityDescription
 from homeassistant.helpers.entity_component import EntityComponent
 from homeassistant.helpers.typing import ConfigType
 from homeassistant.loader import bind_hass
+from homeassistant.util.hass_dict import HassKey
 
 from .const import DOMAIN, INTENT_CLOSE_COVER, INTENT_OPEN_COVER  # noqa: F401
 
 _LOGGER = logging.getLogger(__name__)
 
+DOMAIN_DATA: HassKey[EntityComponent[CoverEntity]] = HassKey(DOMAIN)
 ENTITY_ID_FORMAT = DOMAIN + ".{}"
 PLATFORM_SCHEMA = cv.PLATFORM_SCHEMA
 PLATFORM_SCHEMA_BASE = cv.PLATFORM_SCHEMA_BASE
@@ -151,7 +153,7 @@ def is_closed(hass: HomeAssistant, entity_id: str) -> bool:
 
 async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     """Track states and offer events for covers."""
-    component = hass.data[DOMAIN] = EntityComponent[CoverEntity](
+    component = hass.data[DOMAIN_DATA] = EntityComponent[CoverEntity](
         _LOGGER, DOMAIN, hass, SCAN_INTERVAL
     )
 
@@ -231,14 +233,12 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
 
 async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Set up a config entry."""
-    component: EntityComponent[CoverEntity] = hass.data[DOMAIN]
-    return await component.async_setup_entry(entry)
+    return await hass.data[DOMAIN_DATA].async_setup_entry(entry)
 
 
 async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
     """Unload a config entry."""
-    component: EntityComponent[CoverEntity] = hass.data[DOMAIN]
-    return await component.async_unload_entry(entry)
+    return await hass.data[DOMAIN_DATA].async_unload_entry(entry)
 
 
 class CoverEntityDescription(EntityDescription, frozen_or_thawed=True):