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Siemens 3RH1422-1BG40 — Contactors

Siemens 3RH1422-1BG40 SIRIUS Auxiliary Contactor, 24V DC, 10

MPN3RH1422-1BG40

Siemens SIRIUS auxiliary contactor, 3RH1422-1BG40, S00 size, 24V DC coil, 10A rated current, screw and snap-on mounting, IP20 front.

$323.25Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

3RH1422-1BG40 — Identification
ParameterValue
Contactor frame sizeS00
3RH1422-1BG40 — 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 V6 A
Rated value @ 24 V10 A
Rated value @ 110 V1 A
Rated value @ 220 V0.27 A
3RH1422-1BG40 — Control & Coil
ParameterValue
Control supply voltage typeDC
3RH1422-1BG40 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1422-1BG40 — Connection & Mounting
ParameterValue
Conductor cross-section, solid2x (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
3RH1422-1BG40 — Durability
ParameterValue
Durability (operating cycles, typ.)5 000 000
Durability with aux. switch block (cycles, typ.)5 000 000
3RH1422-1BG40 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH1422-1BG40 — Mechanical
ParameterValue
Width90 mm
Height57.5 mm
Depth72 mm

Product details

It carries a 24 V DC coil with a holding power of 3.2 W and is rated for 10 A at 24 V, stepping down to 1 A at 690 V — so the thermal rating follows the voltage curve, not a fixed ampacity. The contact configuration gives you 2 normally open instantaneous contacts, no delayed or lagging switching, which means it's a straight on/off auxiliary block for feedback, interlocks, or PLC input isolation.

Mounts via screw and snap-on to a DIN rail. The S00 footprint is compact at 90 mm wide, 57.5 mm tall, and 72 mm deep — it fits standard 35 mm rail with room for adjacent contactor stacks. Screw terminals accept solid conductors: 2x 0.5–1.5 mm², 2x 0.75–2.5 mm², or 2x 4 mm².

The coil draws 3.2 W both on closing and holding, so there's no inrush spike to size a power supply around — steady-state load. Shock resistance is 10g for 5 ms and 5g for 10 ms, adequate for most industrial panel environments.

Frequently asked questions

What is the closest functional second-source for 3RH1422-1BG40?

The 3RH2122-1BW40 is a functional peer in the same SIRIUS family, but it uses a different coil voltage (24 V AC vs the 24 V DC of the 3RH1422-1BG40). If your panel is wired for DC control, the 3RH1422-1BG40 is the correct fit. The 3RH2122-1BA40 is another 24 V AC variant. Neither drops in without checking the coil supply — the mechanical footprint (S00) and terminal layout are the same, so mounting and wiring positions are compatible, but the coil driver must match.

Where can I buy 3RH1422-1BG40?

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

What compliance documentation does Siemens provide for 3RH1422-1BG40?

The part carries RoHS compliance with a substance prohibition date of 01.07.2006, reference code K per IEC 81346-2, and surge voltage resistance rated at 6 kV. Standard Siemens SIRIUS documentation includes a CE declaration and UL/CSA listings — check the specific product certificate for your jurisdiction.

MPN
3RH1422-1BG40