What this part is and what it does
The Siemens 3RH1380-2AF00-ZX95 is a SIRIUS auxiliary contactor, size S00, carrying 8 instantaneous normally-open contacts rated 10 A at 24 V. It is a current-production part (lifecycle stage: current) used to switch control signals, pilot devices, and PLC outputs in a panel — not a main power contactor, but the relay that tells the main contactor what to do.
Key ratings and what they mean for fit
The 8 NO contacts are all instantaneous — no leading, lagging, delayed, or make-before-break switching here. That means every contact closes at the same time when the coil picks up, which simplifies timing in a safety circuit or interlock string. The contact reliability spec — one incorrect switching operation per 100 million operations at 17 V, 1 mA — tells you it handles dry logic levels (PLC inputs) without needing a wetting current. Rated surge voltage resistance is 6 kV, which puts it in the IEC 60947-1 overvoltage category III for industrial panels. The IP20 front protection means it's safe from finger contact but not washdown — standard for a DIN-rail component inside a closed enclosure.
Mounting and integration
Fastening method is screw and snap-on mounting — clips onto a 35 mm DIN rail or screws directly to a mounting plate. The size S00 footprint is the smallest Siemens contactor frame: 45 mm wide, 60 mm tall, 114 mm deep. Mounting position allows +/-180° rotation on a vertical surface and can be tilted forward/backward by +/-22.5°, so you can orient it to fit tight enclosures or cable ducts. Terminal capacity accepts 2x (0.25... 2.5 mm²) solid or stranded wire — standard for control wiring. Strip length is not given here, but 8 mm is typical for this terminal family.