diff --git a/homeassistant/components/smartthings/sensor.py b/homeassistant/components/smartthings/sensor.py
index 13315c30031..2a61be3dc75 100644
--- a/homeassistant/components/smartthings/sensor.py
+++ b/homeassistant/components/smartthings/sensor.py
@@ -2,8 +2,8 @@
 
 from __future__ import annotations
 
-from collections import namedtuple
 from collections.abc import Sequence
+from typing import NamedTuple
 
 from pysmartthings import Attribute, Capability
 from pysmartthings.device import DeviceEntity
@@ -34,9 +34,17 @@ from homeassistant.util import dt as dt_util
 from . import SmartThingsEntity
 from .const import DATA_BROKERS, DOMAIN
 
-Map = namedtuple(
-    "Map", "attribute name default_unit device_class state_class entity_category"
-)
+
+class Map(NamedTuple):
+    """Tuple for mapping Smartthings capabilities to Home Assistant sensors."""
+
+    attribute: str
+    name: str
+    default_unit: str | None
+    device_class: SensorDeviceClass | None
+    state_class: SensorStateClass | None
+    entity_category: EntityCategory | None
+
 
 CAPABILITY_TO_SENSORS: dict[str, list[Map]] = {
     Capability.activity_lighting_mode: [
@@ -629,8 +637,8 @@ class SmartThingsSensor(SmartThingsEntity, SensorEntity):
         device: DeviceEntity,
         attribute: str,
         name: str,
-        default_unit: str,
-        device_class: SensorDeviceClass,
+        default_unit: str | None,
+        device_class: SensorDeviceClass | None,
         state_class: str | None,
         entity_category: EntityCategory | None,
     ) -> None: