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Siemens 3RH2122-2BN40-0AA6 — Contactors

Siemens 3RH2122-2BN40-0AA6 SIRIUS Auxiliary Contactor, S00,

MPN3RH2122-2BN40-0AA6

Siemens SIRIUS auxiliary contactor, size S00, 3RH2122-2BN40-0AA6, 2 NO instantaneous contacts, 73 mm depth, 45 mm width, screw and snap-on mounting on 35 mm DIN rail.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3RH2122-2BN40-0AA6 — Identification
ParameterValue
Contactor frame sizeS00
3RH2122-2BN40-0AA6 — Ratings & Performance
ParameterValue
Rated operational current, AC-12, max.10 A
Rated value @ 400 V3 A
Rated value @ 500 V2 A
Rated value @ 690 V1 A
Rated value @ 230 V10 A
Rated value @ 24 V10 A
Rated value @ 60 V4.7 A
Rated value @ 110 V3 A
Rated value @ 220 V1.2 A
3RH2122-2BN40-0AA6 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH2122-2BN40-0AA6 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH2122-2BN40-0AA6 — Connection & Mounting
ParameterValue
Conductor cross-section, solid or stranded2x (0,5 ... 4 mm²)
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail
3RH2122-2BN40-0AA6 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RH2122-2BN40-0AA6 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH2122-2BN40-0AA6 — Mechanical
ParameterValue
Width45 mm
Height70 mm
Depth73 mm
3RH2122-2BN40-0AA6 — Specifications
ParameterValue
At AC10 000 1/h

Product details

Its 73 mm depth and 45 mm width fit the standard S00 footprint, and the mounting position allows ±180° rotation on a vertical surface plus ±22.5° forward/backward tilt, giving flexibility in tight enclosures.

The contact block is rated for switching across a wide voltage range: 10 A at 24 V, 10 A at 230 V, 3 A at 400 V, and 1 A at 690 V. At DC voltages it handles 4.7 A at 60 V, 3 A at 110 V, and 1.2 A at 220 V. These ratings cover both AC and DC control circuits typically found in motor starter auxiliaries, PLC output interposing, and signal feedback loops.

Operating temperature range is -25 to +60 °C, storage from -55 to +80 °C, with a minimum relative humidity of 10 %. Pollution degree 3 (conductive or dry non-conductive pollution) means it's suitable for industrial control panels without additional conformal coating in most environments.

Wiring and compliance

The product carries RoHS compliance dated to 10 January 2009, meeting EU substance restrictions for industrial equipment. As a SIRIUS auxiliary contactor, it is designed to meet IEC/EN 60947-5-1 requirements for control circuit devices.

Frequently asked questions

Where can I buy 3RH2122-2BN40-0AA6 and how do I get a price?

This part is sourced through independent distribution and quoted to order against an RFQ. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm price and lead time.

Will 3RH2122-2BN40-0AA6 drop into a panel specified around 3RH2122-1BW40 without rewiring?

Both are S00 frame auxiliary contactors with the same 45 mm width and 73 mm depth, so the mechanical footprint and DIN-rail mounting are identical. The 2 NO contact arrangement matches. Verify the coil voltage and terminal wiring — the -2BN40 variant uses screw terminals accepting 2 x (0.5 to 4 mm²), which is standard for the S00 platform.

What compliance documentation does this brand provide for 3RH2122-2BN40-0AA6?

The product carries RoHS compliance dated 10 January 2009, and as a SIRIUS auxiliary contactor it is designed to meet IEC/EN 60947-5-1 for control circuit devices. UL and CSA listings are standard for the SIRIUS platform but should be confirmed per the specific variant.

MPN
3RH2122-2BN40-0AA6