Siemens 5SX9100-HS U Circuit Breaker

The Siemens 5SX9100-HS U is an auxiliary contact block for the Siemens ITE 5SX9 miniature circuit-breaker family, designed to deliver a secondary signaling path without interfering with the breaker’s primary protection function. This DPDT auxiliary switch provides two contacts: a normally open and a normally closed contact, enabling reliable status signaling, remote interlocking, or fault-logic interfaces in control panels. It is mountable to compatible 5SX2-5 miniature circuit-breakers, making it a compact addition for motor-control and automation applications where a breaker’s position must be monitored. Rated for up to 6 A at 230 VAC or 230 VDC, the unit supports common control circuits and logic interconnections in industrial equipment. The 5SX9100-HS U accessory belongs to Siemens’ ITE 5SX9 family and is typically used to mirror the main breaker’s state in auxiliary circuits, allowing plant personnel to implement interlocks, alarms, or signaled feedback to PLCs or safety relays. With its compact form factor and robust Siemens construction, this auxiliary contact block can be selected when precise, electrical-status reporting is required in panel layouts that favor integrated signaling options alongside main protection devices.