{"product_id":"siemens-3ru2136-4qb0-motor-protection-overload-relay","title":"Siemens 3RU2136-4QB0 Motor Protection Overload Relay","description":"\u003cdiv\u003e\u003cp\u003eThe Siemens SIRIUS 3RU2136-4QB0 is a three-pole standalone thermal overload relay from the 3RU2 family designed for motor protection. It is built on the S2 frame and rated for 690 V insulation with a current range of 47 to 57 A (class 10 thermal protection), making it suitable for protecting three‑phase motors in motor starters. The device is configured for stand‑alone installation, with screw terminals for both the main circuit and the auxiliary circuit, and it offers a manual–automatic reset option to restore operation after a trip. Additional verified specifications include a surge voltage resistance of 6 kV and a typical power loss around 11 W, with an ambient operating range of −40 to +70 °C, ensuring reliability across demanding industrial environments. In use, the 3RU2136-4QB0 provides reliable motor overload protection within Siemens’ SIRIUS protection lineup and is commonly paired with contactors in motor control circuits to safeguard motors from overheating while maintaining straightforward wiring and maintenance. \u003c\/p\u003e\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"New","offer_id":46268125970666,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/8039\/3450\/files\/GTG-STOCK-017.png?v=1788727429","url":"https:\/\/gtghardware.com\/products\/siemens-3ru2136-4qb0-motor-protection-overload-relay","provider":"GTG Hardware","version":"1.0","type":"link"}