Siemens AG 3RH2140-1AP60 Three-Phase Contactor

The Siemens 3RH2140-1AP60 is a SIRIUS auxiliary contactor relay in a compact S00 frame with four normally open contacts (4 NO) and screw-terminal wiring, designed for control-circuit applications in automation systems. It accepts a 230 V-class control supply: 220 V AC at 50 Hz or 240 V AC at 60 Hz, making it compatible with common European control architectures, and it carries an insulation voltage up to 690 V with front IP20 protection for installation inside control panels. This unit is built for high-frequency switching, featuring a mechanical life specification that can reach approximately 30,000,000 cycles, depending on operating conditions, ensuring long-term reliability in signaling and interlocking duties. As part of the 3RH2 family, it is typically used to interface PLCs or to actuate auxiliary relays and signaling circuits within industrial automation, providing a compact, four-NO-contact solution when a small-footprint control relay is required. The screw-terminal design simplifies wiring during panel assembly and maintenance, while the S00 frame size enables integration into tight control enclosures without sacrificing performance.