diff --git a/src/devices/casaia.ts b/src/devices/casaia.ts
index e08676b0c2335..5182e0bd6bff1 100644
--- a/src/devices/casaia.ts
+++ b/src/devices/casaia.ts
@@ -15,6 +15,13 @@ const definitions: DefinitionWithExtend[] = [
         description: 'Dry contact relay switch module in 220v AC for gas boiler',
         extend: [onOff()],
     },
+    {
+        zigbeeModel: ['CSAC451-WTC-E'],
+        model: 'CSAC451-WTC-E',
+        vendor: 'CASAIA',
+        description: 'Dry contact relay switch module in 6-24v AC',
+        extend: [onOff()],
+    },
     {
         zigbeeModel: ['CTHS317ET'],
         model: 'CTHS-317-ET',