The Siemens 3RH1911-2HA12-3AA1 is a spring-type terminal block accessory for motor contactors, configured as 22 E with 1 normally open and 2 normally closed contacts per EN 50012. It is designed for panel integration where spring-cage termination is preferred over screw terminals for vibration resistance and faster wiring.
Integration Notes
The spring-type terminal accepts solid or ferruled stranded conductors without requiring screw torque verification — a time-saver on repetitive contactor banks. The 22 E designation indicates the terminal width and pitch compatible with standard EN 50012 contactor accessories, so it clips onto the contactor's auxiliary contact block mounting rail without additional hardware.