{"product_id":"siemens-5sy42-c40-circuit-breaker-2-pole-40a-400vac","title":"Siemens 5SY42-C40 Circuit Breaker 2 Pole 40A 400VAC","description":"\u003cdiv\u003e\u003cp\u003eSiemens 5SY42-C40 is a two-pole miniature circuit breaker rated for 40 A at 400 VAC, designed to protect distribution circuits in industrial and commercial panels. It belongs to the SENTRON 5SY family, delivering reliable overcurrent protection for multi‑wire circuits in standard 50\/60 Hz networks. This unit includes a 5ST3010 auxiliary switch, providing a 1 normally open and 1 normally closed contact for status indication or interlocking with control logic. The 5ST3010 auxiliary switch is rated for operation at 400\/230 VAC, ensuring compatibility with typical panel mains and automation circuits. Ideal for machine control panels, distribution boards, and automation subsystems that require a 40 A protective device on 400 V systems, the 5SY42-C40 supports straightforward integration with other Siemens miniature breakers in the 5SL\/5SY\/5SP family and compatible accessories, enabling coordinated protection and simple field installation in industrial environments.\u003c\/p\u003e\u003c\/div\u003e","brand":"Siemens","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":46268246524138,"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-5sy42-c40-circuit-breaker-2-pole-40a-400vac","provider":"GTG Hardware","version":"1.0","type":"link"}