diff --git a/homeassistant/components/dsmr/config_flow.py b/homeassistant/components/dsmr/config_flow.py
index c7b9ab4e380..3b32d354766 100644
--- a/homeassistant/components/dsmr/config_flow.py
+++ b/homeassistant/components/dsmr/config_flow.py
@@ -53,6 +53,8 @@ class DSMRConnection:
         self._protocol = protocol
         self._telegram: dict[str, DSMRObject] = {}
         self._equipment_identifier = obis_ref.EQUIPMENT_IDENTIFIER
+        if dsmr_version == "5B":
+            self._equipment_identifier = obis_ref.BELGIUM_EQUIPMENT_IDENTIFIER
         if dsmr_version == "5L":
             self._equipment_identifier = obis_ref.LUXEMBOURG_EQUIPMENT_IDENTIFIER
         if dsmr_version == "Q3D":
diff --git a/tests/components/dsmr/conftest.py b/tests/components/dsmr/conftest.py
index 67e8b724a97..01aff5ae48e 100644
--- a/tests/components/dsmr/conftest.py
+++ b/tests/components/dsmr/conftest.py
@@ -5,6 +5,7 @@ from unittest.mock import MagicMock, patch
 from dsmr_parser.clients.protocol import DSMRProtocol
 from dsmr_parser.clients.rfxtrx_protocol import RFXtrxDSMRProtocol
 from dsmr_parser.obis_references import (
+    BELGIUM_EQUIPMENT_IDENTIFIER,
     EQUIPMENT_IDENTIFIER,
     EQUIPMENT_IDENTIFIER_GAS,
     LUXEMBOURG_EQUIPMENT_IDENTIFIER,
@@ -81,6 +82,15 @@ async def dsmr_connection_send_validate_fixture(hass):
 
     async def connection_factory(*args, **kwargs):
         """Return mocked out Asyncio classes."""
+        if args[1] == "5B":
+            protocol.telegram = {
+                BELGIUM_EQUIPMENT_IDENTIFIER: CosemObject(
+                    BELGIUM_EQUIPMENT_IDENTIFIER, [{"value": "12345678", "unit": ""}]
+                ),
+                EQUIPMENT_IDENTIFIER_GAS: CosemObject(
+                    EQUIPMENT_IDENTIFIER_GAS, [{"value": "123456789", "unit": ""}]
+                ),
+            }
         if args[1] == "5L":
             protocol.telegram = {
                 LUXEMBOURG_EQUIPMENT_IDENTIFIER: CosemObject(
diff --git a/tests/components/dsmr/test_config_flow.py b/tests/components/dsmr/test_config_flow.py
index 8ad7c7214a3..c4bbe9a7086 100644
--- a/tests/components/dsmr/test_config_flow.py
+++ b/tests/components/dsmr/test_config_flow.py
@@ -215,6 +215,50 @@ async def test_setup_serial_rfxtrx(
     assert result["data"] == {**entry_data, **SERIAL_DATA}
 
 
+@patch("serial.tools.list_ports.comports", return_value=[com_port()])
+async def test_setup_5B(
+    com_mock, hass: HomeAssistant, dsmr_connection_send_validate_fixture
+) -> None:
+    """Test we can setup serial."""
+    port = com_port()
+
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": config_entries.SOURCE_USER}
+    )
+
+    assert result["type"] == "form"
+    assert result["step_id"] == "user"
+    assert result["errors"] is None
+
+    result = await hass.config_entries.flow.async_configure(
+        result["flow_id"],
+        {"type": "Serial"},
+    )
+
+    assert result["type"] == "form"
+    assert result["step_id"] == "setup_serial"
+    assert result["errors"] == {}
+
+    with patch("homeassistant.components.dsmr.async_setup_entry", return_value=True):
+        result = await hass.config_entries.flow.async_configure(
+            result["flow_id"],
+            {"port": port.device, "dsmr_version": "5B"},
+        )
+        await hass.async_block_till_done()
+
+    entry_data = {
+        "port": port.device,
+        "dsmr_version": "5B",
+        "protocol": "dsmr_protocol",
+        "serial_id": "12345678",
+        "serial_id_gas": "123456789",
+    }
+
+    assert result["type"] == "create_entry"
+    assert result["title"] == port.device
+    assert result["data"] == entry_data
+
+
 @patch("serial.tools.list_ports.comports", return_value=[com_port()])
 async def test_setup_5L(
     com_mock, hass: HomeAssistant, dsmr_connection_send_validate_fixture