The Siemens 3RH1344-2CP00-0KA0-ZW97 is a SIRIUS auxiliary contactor, size S00, with four normally-open instantaneous contacts. It's the part that handles the signal-level switching in a motor starter or control circuit — the coil feedback, the PLC interlock, the status lamp. The 4 NO arrangement means it's wired for circuits that need to close on pickup; no NC or changeover contacts on this variant.
Panel integration notes
The 45 mm width and 60 mm height fit the standard S00 footprint — it'll drop into a panel that's already laid out for SIRIUS contactors or other S00-frame devices. The 114 mm depth is the dimension to watch when you're sizing the enclosure depth; it's the distance from the DIN rail or mounting surface to the front of the contactor. The screw terminals accept solid conductors from 0.25 to 2.5 mm², which covers the typical control wiring range — 1.5 mm² for most pilot circuits, 2.5 mm² for the heavier interlock runs. The mounting position is flexible: it can be rotated ±180° on a vertical surface and tilted forward or backward by ±22.5°. That's useful when you're working around existing wireways or busbars — you're not locked into a single orientation. The shock resistance of 10g at 5 ms and 5g at 10 ms is standard for industrial control gear; it'll hold up on a machine that sees vibration from a nearby press or conveyor drive.
Compliance and documentation
The substance prohibition date of 07/01/2006 aligns with the original EU RoHS directive (RoHS 1), so the part is RoHS-compliant for the standard six restricted substances. The degree of pollution 3 means it's rated for conductive pollution environments — typical inside an industrial control panel where dust, humidity, or occasional condensation are present. The contact reliability spec — one incorrect switching operation per 100 million operations at 17 V, 1 mA — tells you it's reliable for dry-circuit switching, which matters when you're reading a limit switch or a sensor signal through the auxiliary contacts.