The Siemens 3RH1140-1AP00-0AA6 is a SIRIUS auxiliary contactor, size S00, with four normally-open instantaneous contacts. It's the signal-switching side of a motor starter or contactor assembly — used to pass status back to a PLC, interlock a safety circuit, or extend the contact count on a larger contactor. Rated for 10 A at 24 V and 6 A at 230 V, with a 6 kV surge voltage withstand, it handles the control-circuit switching in a 400 V panel without issue.
Mounting and integration
Mounts via screw or snap-on to a DIN rail. The 45 mm width and 72 mm depth fit standard S00 contactor spacing — you can gang it next to a 3RT2 contactor on the same rail without extra brackets. Mounting position allows ±180° rotation on a vertical surface, plus ±22.5° tilt forward and backward, which helps when the gland plate or busbar layout forces an odd orientation. Screw terminals accept 2x 4 mm² solid or 2x 1.5 mm² stranded — no ferrule crimping required for the larger wire, but the spring pressure is set for the listed cross-sections.
Contact ratings and switching capability
Four NO contacts rated for 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, and 1 A at 690 V. The 50/60 Hz coil tolerance is 0.8 to 1.1 times rated voltage at 50 Hz, 0.85 to 1.1 at 60 Hz. Contact reliability is specified at one incorrect switching operation per 100 million cycles at 17 V, 1 mA — that's the low-energy switching figure that matters for PLC inputs or dry-contact signals. Shock resistance is 10g at 5 ms and 5g at 10 ms, so it holds in high-vibration environments like compressor skids or conveyor drives.
Environmental and compliance
Operating temperature range is -25 to +60 °C; storage and transport range is -55 to +80 °C. IP20 on the front means finger-safe but not washdown-rated — keep it inside a panel. Pollution degree 3, so it's suitable for industrial environments with conductive dust or condensation. RoHS compliance date listed as July 1, 2006 — the part is fully RoHS-compliant.