diff --git a/homeassistant/components/qwikswitch/__init__.py b/homeassistant/components/qwikswitch/__init__.py
index d3cf2ff3d9b..7dedee04508 100644
--- a/homeassistant/components/qwikswitch/__init__.py
+++ b/homeassistant/components/qwikswitch/__init__.py
@@ -24,9 +24,9 @@ from homeassistant.helpers.discovery import load_platform
 from homeassistant.helpers.dispatcher import async_dispatcher_send
 from homeassistant.helpers.typing import ConfigType
 
-_LOGGER = logging.getLogger(__name__)
+from .const import DATA_QUIKSWITCH, DOMAIN
 
-DOMAIN = "qwikswitch"
+_LOGGER = logging.getLogger(__name__)
 
 CONF_DIMMER_ADJUST = "dimmer_adjust"
 CONF_BUTTON_EVENTS = "button_events"
@@ -96,7 +96,7 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     if not await qsusb.update_from_devices():
         return False
 
-    hass.data[DOMAIN] = qsusb
+    hass.data[DATA_QUIKSWITCH] = qsusb
 
     comps: dict[Platform, list] = {
         Platform.SWITCH: [],
@@ -168,7 +168,7 @@ async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     @callback
     def async_stop(_):
         """Stop the listener."""
-        hass.data[DOMAIN].stop()
+        hass.data[DATA_QUIKSWITCH].stop()
 
     hass.bus.async_listen(EVENT_HOMEASSISTANT_STOP, async_stop)
 
diff --git a/homeassistant/components/qwikswitch/binary_sensor.py b/homeassistant/components/qwikswitch/binary_sensor.py
index 5f00631f0e4..6033b5f584a 100644
--- a/homeassistant/components/qwikswitch/binary_sensor.py
+++ b/homeassistant/components/qwikswitch/binary_sensor.py
@@ -14,7 +14,7 @@ from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
-from . import DOMAIN
+from .const import DATA_QUIKSWITCH, DOMAIN
 from .entity import QSEntity
 
 _LOGGER = logging.getLogger(__name__)
@@ -30,7 +30,7 @@ async def async_setup_platform(
     if discovery_info is None:
         return
 
-    qsusb = hass.data[DOMAIN]
+    qsusb = hass.data[DATA_QUIKSWITCH]
     _LOGGER.debug("Setup qwikswitch.binary_sensor %s, %s", qsusb, discovery_info)
     devs = [QSBinarySensor(sensor) for sensor in discovery_info[DOMAIN]]
     add_entities(devs)
diff --git a/homeassistant/components/qwikswitch/const.py b/homeassistant/components/qwikswitch/const.py
new file mode 100644
index 00000000000..2a5cc69af50
--- /dev/null
+++ b/homeassistant/components/qwikswitch/const.py
@@ -0,0 +1,13 @@
+"""Support for Qwikswitch devices."""
+
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+from homeassistant.util.hass_dict import HassKey
+
+if TYPE_CHECKING:
+    from pyqwikswitch.async_ import QSUsb
+
+DOMAIN = "qwikswitch"
+DATA_QUIKSWITCH: HassKey[QSUsb] = HassKey(DOMAIN)
diff --git a/homeassistant/components/qwikswitch/entity.py b/homeassistant/components/qwikswitch/entity.py
index ff7a1d2e98a..4df52fda2c4 100644
--- a/homeassistant/components/qwikswitch/entity.py
+++ b/homeassistant/components/qwikswitch/entity.py
@@ -7,7 +7,7 @@ from homeassistant.core import callback
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
 from homeassistant.helpers.entity import Entity
 
-from . import DOMAIN
+from .const import DATA_QUIKSWITCH
 
 
 class QSEntity(Entity):
@@ -67,8 +67,8 @@ class QSToggleEntity(QSEntity):
     async def async_turn_on(self, **kwargs):
         """Turn the device on."""
         new = kwargs.get(ATTR_BRIGHTNESS, 255)
-        self.hass.data[DOMAIN].devices.set_value(self.qsid, new)
+        self.hass.data[DATA_QUIKSWITCH].devices.set_value(self.qsid, new)
 
     async def async_turn_off(self, **_):
         """Turn the device off."""
-        self.hass.data[DOMAIN].devices.set_value(self.qsid, 0)
+        self.hass.data[DATA_QUIKSWITCH].devices.set_value(self.qsid, 0)
diff --git a/homeassistant/components/qwikswitch/sensor.py b/homeassistant/components/qwikswitch/sensor.py
index e87fae83464..3a79dd0af98 100644
--- a/homeassistant/components/qwikswitch/sensor.py
+++ b/homeassistant/components/qwikswitch/sensor.py
@@ -12,7 +12,7 @@ from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
-from . import DOMAIN
+from .const import DATA_QUIKSWITCH, DOMAIN
 from .entity import QSEntity
 
 _LOGGER = logging.getLogger(__name__)
@@ -28,7 +28,7 @@ async def async_setup_platform(
     if discovery_info is None:
         return
 
-    qsusb = hass.data[DOMAIN]
+    qsusb = hass.data[DATA_QUIKSWITCH]
     _LOGGER.debug("Setup qwikswitch.sensor %s, %s", qsusb, discovery_info)
     devs = [QSSensor(sensor) for sensor in discovery_info[DOMAIN]]
     add_entities(devs)
diff --git a/homeassistant/components/qwikswitch/switch.py b/homeassistant/components/qwikswitch/switch.py
index 6131d9e595c..4b3cddee0d9 100644
--- a/homeassistant/components/qwikswitch/switch.py
+++ b/homeassistant/components/qwikswitch/switch.py
@@ -7,7 +7,7 @@ from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
-from . import DOMAIN
+from .const import DATA_QUIKSWITCH, DOMAIN
 from .entity import QSToggleEntity
 
 
@@ -21,7 +21,7 @@ async def async_setup_platform(
     if discovery_info is None:
         return
 
-    qsusb = hass.data[DOMAIN]
+    qsusb = hass.data[DATA_QUIKSWITCH]
     devs = [QSSwitch(qsid, qsusb) for qsid in discovery_info[DOMAIN]]
     add_entities(devs)