The Siemens 3RT2015-2BM42 is a SIRIUS power contactor in the S00 frame size, designed for switching motor loads and resistive loads in control panels up to 690 V. The 24 VDC coil pulls in reliably; the spring-type terminals accept solid or stranded conductors from 0.5 to 4 mm², which covers the typical control-wire range for panel builders.
The contactor's mechanical life is listed at 30,000,000 operations typical — that is the coil and mechanism, not the contacts under load; electrical life depends on the switching category and frequency.
The mounting position allows ±180° rotation on a vertical surface and ±22.5° tilt forward/backward, so it fits odd panel orientations. Clearances: 10 mm upward, 10 mm forward, 10 mm downward, 6 mm at the side — that is the free-air spacing needed for arc extinguishing and heat dissipation. The spring-cage terminals accept two conductors per clamp (2x 0.5–4 mm² solid or stranded), which simplifies daisy-chaining control wiring.