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Siemens 3RH2122-1BP40 — Contactors

Siemens 3RH2122-1BP40 SIRIUS Auxiliary Contactor, S00, 2 NO,

MPN3RH2122-1BP40
Active

Siemens SIRIUS auxiliary contactor, size S00, 2 NO contacts, 24 VDC coil, screw and snap-on mounting onto 35 mm DIN rail, 45 x 57.5 x 73 mm.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

3RH2122-1BP40 — Identification
ParameterValue
Contactor frame sizeS00
3RH2122-1BP40 — 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
3RH2122-1BP40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH2122-1BP40 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH2122-1BP40 — Connection & Mounting
ParameterValue
Conductor cross-section, solid or stranded2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²), 2x 4 mm²
Conductor cross-section, finely stranded w/ ferrule2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²)
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail
3RH2122-1BP40 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RH2122-1BP40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH2122-1BP40 — Mechanical
ParameterValue
Width45 mm
Height57.5 mm
Depth73 mm
3RH2122-1BP40 — Specifications
ParameterValue
At AC10 000 1/h

Product details

Switching Capacity by Voltage

Rated operational current is specified across the voltage range: 10 A at 24 V, 4.7 A at 60 V, 3 A at 110 V, 1.2 A at 220 V, 10 A at 230 V, 3 A at 400 V, 0.5 A at 440 V, 2 A at 500 V, 0.26 A at 600 V, and 1 A at 690 V. The 230 V figure matches the 24 V rating, which is unusual — verify the load type against the duty class in your application.

Dimensions are 45 mm wide, 57.5 mm tall, 73 mm deep — the S00 footprint that fits alongside SIRIUS contactors and overload relays in a compact row.

Terminals accept 2 x (0.5 to 1.5 mm²), 2 x (0.75 to 2.5 mm²), or 2 x 4 mm² solid or stranded wire. Pollution degree 3 (industrial environment). Relative humidity minimum 10 %. RoHS compliance date is 10/01/2009, covering the EU RoHS scope.

Frequently asked questions

Where can I buy 3RH2122-1BP40 and how do I get a price?

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

Will 3RH2122-1BP40 drop into a panel that was specified around 3RH2122-1BW40 without rewiring?

Both are SIRIUS S00 auxiliary contactors with the same DIN-rail footprint, same 45 x 57.5 x 73 mm dimensions, and same terminal wire ranges. The difference is the coil voltage — 3RH2122-1BP40 uses 24 VDC, while 3RH2122-1BW40 uses a different coil rating. If the panel's control voltage matches 24 VDC, it drops in without rewiring.

What compliance documentation does Siemens provide for 3RH2122-1BP40?

RoHS compliance is confirmed with a substance-prohibitance date of 10/01/2009. The part carries pollution degree 3 rating per IEC 60947-1, suitable for industrial environments. Siemens typically provides CE, UKCA, and EAC declarations for the SIRIUS range, though specific certificates are not listed in this record.

MPN
3RH2122-1BP40