{"product_id":"siemens-3rv2021-4ea10-motor-protection-switch","title":"Siemens 3RV2021-4EA10 Motor Protection Switch","description":"\u003cdiv\u003e\u003cp\u003eSiemens 3RV2021-4EA10 is a three‑pole Sirius Innovation motor protection circuit breaker (MPCB) sized S0, engineered to protect and disconnect motors in control panels. It is rated for 27–32 A and up to 690 V AC, with a Class 10 A release, making it suitable as the motor protection device in medium‑voltage motor circuits. The unit uses screw terminals for secure field wiring, supports an ambient operating temperature down to -50 °C, and is specified for 500 switching cycles, aligning with typical industrial cycling demands. An optional product extension auxiliary switch can be added for signaling and control within a Siemens motor control scheme. In practice, it provides both thermal overload and short‑circuit protection for 3‑phase motors and can function as the motor disconnect in starter configurations when used with compatible contactors, extending its applicability across Siemens automation architectures at 690 V. \u003c\/p\u003e\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"New","offer_id":46268136816874,"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-3rv2021-4ea10-motor-protection-switch","provider":"GTG Hardware","version":"1.0","type":"link"}