diff --git a/homeassistant/components/transmission/entity.py b/homeassistant/components/transmission/entity.py
new file mode 100644
index 00000000000..0fe4058ad1d
--- /dev/null
+++ b/homeassistant/components/transmission/entity.py
@@ -0,0 +1,30 @@
+"""Base class for Transmission entities."""
+
+from homeassistant.helpers.device_registry import DeviceInfo
+from homeassistant.helpers.entity import EntityDescription
+from homeassistant.helpers.update_coordinator import CoordinatorEntity
+
+from .const import DOMAIN
+from .coordinator import TransmissionDataUpdateCoordinator
+
+
+class TransmissionEntity(CoordinatorEntity[TransmissionDataUpdateCoordinator]):
+    """Defines a base Transmission entity."""
+
+    _attr_has_entity_name = True
+
+    def __init__(
+        self,
+        coordinator: TransmissionDataUpdateCoordinator,
+        entity_description: EntityDescription,
+    ) -> None:
+        """Initialize Transmission entity."""
+        super().__init__(coordinator)
+        self.entity_description = entity_description
+        self._attr_unique_id = (
+            f"{coordinator.config_entry.entry_id}-{entity_description.key}"
+        )
+        self._attr_device_info = DeviceInfo(
+            identifiers={(DOMAIN, coordinator.config_entry.entry_id)},
+            manufacturer="Transmission",
+        )
diff --git a/homeassistant/components/transmission/sensor.py b/homeassistant/components/transmission/sensor.py
index feb84f09fa8..e8e8bb389ab 100644
--- a/homeassistant/components/transmission/sensor.py
+++ b/homeassistant/components/transmission/sensor.py
@@ -16,13 +16,10 @@ from homeassistant.components.sensor import (
 )
 from homeassistant.const import STATE_IDLE, UnitOfDataRate
 from homeassistant.core import HomeAssistant
-from homeassistant.helpers.device_registry import DeviceEntryType, DeviceInfo
 from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
 from homeassistant.helpers.typing import StateType
-from homeassistant.helpers.update_coordinator import CoordinatorEntity
 
 from .const import (
-    DOMAIN,
     STATE_ATTR_TORRENT_INFO,
     STATE_DOWNLOADING,
     STATE_SEEDING,
@@ -30,6 +27,7 @@ from .const import (
     SUPPORTED_ORDER_MODES,
 )
 from .coordinator import TransmissionConfigEntry, TransmissionDataUpdateCoordinator
+from .entity import TransmissionEntity
 
 MODES: dict[str, list[str] | None] = {
     "started_torrents": ["downloading"],
@@ -140,30 +138,10 @@ async def async_setup_entry(
     )
 
 
-class TransmissionSensor(
-    CoordinatorEntity[TransmissionDataUpdateCoordinator], SensorEntity
-):
+class TransmissionSensor(TransmissionEntity, SensorEntity):
     """A base class for all Transmission sensors."""
 
     entity_description: TransmissionSensorEntityDescription
-    _attr_has_entity_name = True
-
-    def __init__(
-        self,
-        coordinator: TransmissionDataUpdateCoordinator,
-        entity_description: TransmissionSensorEntityDescription,
-    ) -> None:
-        """Initialize the sensor."""
-        super().__init__(coordinator)
-        self.entity_description = entity_description
-        self._attr_unique_id = (
-            f"{coordinator.config_entry.entry_id}-{entity_description.key}"
-        )
-        self._attr_device_info = DeviceInfo(
-            entry_type=DeviceEntryType.SERVICE,
-            identifiers={(DOMAIN, coordinator.config_entry.entry_id)},
-            manufacturer="Transmission",
-        )
 
     @property
     def native_value(self) -> StateType:
diff --git a/homeassistant/components/transmission/switch.py b/homeassistant/components/transmission/switch.py
index 9ca8a197344..79141ef0e5f 100644
--- a/homeassistant/components/transmission/switch.py
+++ b/homeassistant/components/transmission/switch.py
@@ -6,12 +6,10 @@ from typing import Any
 
 from homeassistant.components.switch import SwitchEntity, SwitchEntityDescription
 from homeassistant.core import HomeAssistant
-from homeassistant.helpers.device_registry import DeviceEntryType, DeviceInfo
 from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
-from homeassistant.helpers.update_coordinator import CoordinatorEntity
 
-from .const import DOMAIN
 from .coordinator import TransmissionConfigEntry, TransmissionDataUpdateCoordinator
+from .entity import TransmissionEntity
 
 
 @dataclass(frozen=True, kw_only=True)
@@ -55,30 +53,10 @@ async def async_setup_entry(
     )
 
 
-class TransmissionSwitch(
-    CoordinatorEntity[TransmissionDataUpdateCoordinator], SwitchEntity
-):
+class TransmissionSwitch(TransmissionEntity, SwitchEntity):
     """Representation of a Transmission switch."""
 
     entity_description: TransmissionSwitchEntityDescription
-    _attr_has_entity_name = True
-
-    def __init__(
-        self,
-        coordinator: TransmissionDataUpdateCoordinator,
-        entity_description: TransmissionSwitchEntityDescription,
-    ) -> None:
-        """Initialize the Transmission switch."""
-        super().__init__(coordinator)
-        self.entity_description = entity_description
-        self._attr_unique_id = (
-            f"{coordinator.config_entry.entry_id}-{entity_description.key}"
-        )
-        self._attr_device_info = DeviceInfo(
-            entry_type=DeviceEntryType.SERVICE,
-            identifiers={(DOMAIN, coordinator.config_entry.entry_id)},
-            manufacturer="Transmission",
-        )
 
     @property
     def is_on(self) -> bool: