The Siemens SIRIUS 3RH1344-1BF40-ZX95 is a 4-pole auxiliary contactor in the S00 frame size, designed for control-circuit switching in industrial panels. The four contacts are all normally open (instantaneous, no delayed or lagging switching), rated for 10 A at 24 V, 6 A at 230 V, and 3 A at 400 V, so it handles typical PLC-level loads and small contactor coils without issue.
Mounts via screw or snap-on onto a DIN rail, with the S00 footprint (45 mm wide, 57.5 mm tall, 111 mm deep). Wire termination accepts solid conductors: 2x (0.5...1.5 mm²), 2x (0.75...2.5 mm²), or 2x 4 mm² per terminal; AWG equivalents are 2x (20...16), 2x (18...14), and 1x 12. IP20 on the front protects against finger contact, not washdown — keep it inside a sealed cabinet.
The 110 V DC coil is rated for continuous duty — the holding power stays at 3.2 W, so no external dropping resistor is needed. The mechanical life is 10 million operations typical; shock resistance is 10g / 5 ms and 5g / 10 ms, so it holds up on vibrating machinery like conveyors or compressors.