3RH1921-1EA11

The 3RH1921-1EA11 is a 2-pole auxiliary contact block from Siemens' SIRIUS 3RH19/3RT1 series, engineered to expand control circuit logic and status feedback capabilities for 3RT1 contactors and 3RH1 control relays. Designed for snap-on mounting, this compact accessory provides additional auxiliary switching contacts operating up to for industrial automation, motor interlocking, and control circuits. Electrically, the 3RH1921-1EA11 features a 1NO + 1NC (1 Normally Open / 1 Normally Closed) contact configuration rated for heavy-duty control circuit duty (). Utilizing high-reliability silver-alloy contacts with low contact resistance, it delivers crisp, positive signal switching for circuit interlocking, operational status indication, and PLC input signals, maintaining reliable performance even across low-voltage and low-current control networks. Mechanically, the 3RH1921-1EA11 is housed in a compact, flame-retardant enclosure designed for toolless front or side mounting depending on the contactor frame size. Equipped with touch-safe IP20 screw terminals and clear, standardized terminal markings, it provides fast, accessible wiring connections inside space-constrained industrial control panels without increasing the lateral footprint of the main contactor. Purchase the 3RH1921-1EA11 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.