3RH1911-1FA22

The 3RH1911-1FA22 is a front-mounting auxiliary contact block from Siemens' SIRIUS 3RH1/3RT1 series, engineered to expand control circuit logic and status feedback capabilities for contactors and control relays. Designed to snap directly onto Size S00 through S3 contactors and 3RH1 control relays, this compact accessory provides additional auxiliary switching contacts operating up to for industrial automation and motor control circuits. Electrically, the 3RH1911-1FA22 features a 2NO + 2NC (2 Normally Open / 2 Normally Closed) contact configuration rated for heavy-duty control circuit duty (). Utilizing high-reliability silver-alloy contacts with low contact resistance, it ensures crisp, positive signal switching for interlocking logic, sequence control, safety shutdowns, and status indication to PLCs and control systems, maintaining reliable switching performance even under low-voltage and low-current conditions. Mechanically, the 3RH1911-1FA22 is housed in a compact, flame-retardant casing that mounts toollessly to the front face of compatible contactors via an integrated snap-on latch mechanism. Equipped with touch-safe IP20 screw terminals and clear terminal markings, it enables fast wiring access and clean conductor routing inside space-constrained electrical panels without increasing the side-by-side footprint of the main contactor. Purchase the 3RH1911-1FA22 at Electrical.com, your reliable partner for industrial and commercial electrical products. Our selection includes trusted auxiliary contact blocks, magnetic contactors, and motor controls from top manufacturers like Siemens, Eaton, Cutler-Hammer, and Schneider Electric, backed by a knowledgeable sales team ready to assist with technical questions, product selection, and support.