Siemens 3RH1911-2HA22 Auxiliary Contact Switch Block

Siemens 3RH1911-2HA22 Auxiliary Contact Switch Block is a front-mounted, 4-pole auxiliary block (size S00) for Siemens motor contactors, providing 2 normally open and 2 normally closed contacts to monitor and interlock motor circuits. It uses spring-type terminals (CAGE CLAMP) with a 32E layout and EN 50012 compatibility, designed to snap onto appropriate Siemens contactors for motor switching. The block is rated for a insulation voltage of 690 V with a 6 kV impulse withstand, and it offers a mechanical life of about 10,000,000 cycles along with an electrical life of up to 200,000 cycles at AC-15 230 V. The auxiliary contacts support up to 10 A (AC-12) across voltages up to 690 V, making it suitable for status signaling and interlock applications in motor-control circuits.