Siemens 3RH1122-1AK60 — SIRIUS Auxiliary Contactor, Size S00, 2 NO
The Siemens 3RH1122-1AK60 is a SIRIUS auxiliary contactor in the compact S00 frame size, carrying two normally open (NO) instantaneous contacts and no NC or delayed switching contacts. It is rated for 10 A at 24 V and 6 A at 230 V, with a contact reliability of one incorrect switching operation per 100 million operations at 17 V, 1 mA. The unit mounts via screw or snap-on to a DIN rail, occupies 45 mm width on the rail, and is protected to IP20 on the front — standard for enclosed panel use where the contactor is not exposed to washdown or dust ingress.
Contact Configuration & Switching Capacity
This contactor provides exactly two NO main contacts with no leading, lagging, delayed, or make-before-break switching. The switching capacity varies by voltage: 10 A at 24 V, 1 A at 110 V, 0.27 A at 220 V, 6 A at 230 V, 3 A at 400 V, 2 A at 500 V, and 1 A at 690 V. The rated control supply voltage is 50 Hz (0.8 to 1.1 times rated) or 60 Hz (0.85 to 1.1 times rated). For a panel-builder, this means the contactor handles typical 24 VDC control signals comfortably at 10 A, but derates significantly at higher AC voltages — a key consideration when switching 400 V or 690 V auxiliary loads.
Panel Integration & Wiring
The 3RH1122-1AK60 accepts solid conductors in three size ranges: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and 2x 4 mm². The screw terminals are standard for SIRIUS S00 contactors. Mounting position is flexible — it allows ±180° rotation on a vertical surface and can be tilted forward or backward by ±22.5° on a vertical mounting surface, which helps in tight enclosures. The unit is rated for pollution degree 3, typical for industrial control panels where conductive dust or condensation may be present. Operating temperature range is -25 to +60 °C; storage and transport range is -55 to +80 °C. Shock resistance is 10g for 5 ms and 5g for 10 ms.
Compliance & Approvals
The 3RH1122-1AK60 is RoHS-compliant per the substance prohibition date of 01.07.2006. The reference code per IEC 81346-2 is K (contactors, relays). The product extension auxiliary switch is available as an add-on. The IP20 front protection means it is suitable for installation inside a cabinet with a higher-rated enclosure door.