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Siemens 3RH1431-1AN20 — Contactors

Siemens 3RH1431-1AN20 SIRIUS Auxiliary Contactor, 3 NO, 10 A

MPN3RH1431-1AN20

Siemens SIRIUS auxiliary contactor, size S00, 3 NO instantaneous contacts, 10 A rated thermal current at 24 V, screw and snap-on DIN rail mounting, 90 x 57.5 x 72 mm.

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

Specifications

3RH1431-1AN20 — Identification
ParameterValue
Contactor frame sizeS00
3RH1431-1AN20 — Ratings & Performance
ParameterValue
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
3RH1431-1AN20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz220 V
3RH1431-1AN20 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH1431-1AN20 — Protection & Coordination
ParameterValue
Aux. switch short-circuit protection, fusefuse gL/gG: 10 A
3RH1431-1AN20 — 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)
3RH1431-1AN20 — Durability
ParameterValue
Durability (operating cycles, typ.)5 000 000
Durability with aux. switch block (cycles, typ.)5 000 000
3RH1431-1AN20 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
3RH1431-1AN20 — Mechanical
ParameterValue
Width90 mm
Height57.5 mm
Depth72 mm

Product details

The Siemens 3RH1431-1AN20 is a SIRIUS auxiliary contactor in the S00 frame size — a compact, snap-on DIN-rail block that adds 3 normally-open instantaneous auxiliary contacts to a contactor or motor starter assembly. It handles 10 A rated thermal current at 24 V (AC-12), with lower ratings at higher voltages: 6 A at 230 V, 3 A at 400 V, 1 A at 690 V.

Mounts via screw or snap-on to a DIN rail — the S00 footprint (90 mm wide, 57.5 mm tall, 72 mm deep) leaves room for adjacent devices in a crowded panel.

Frequently asked questions

What are the key ratings for 3RH1431-1AN20?

3 NO instantaneous contacts, rated thermal current 10 A at 24 V, 6 A at 230 V, 3 A at 400 V, 1 A at 690 V. Mechanical life 5 million cycles. Operating temperature -25 to +60 °C. Pollution degree 3.

Will 3RH1431-1AN20 drop into a panel specified for 3RT1016-1AN22?

Both are S00 frame size with the same screw/snap-on DIN-rail mounting, so the mechanical footprint is identical. However, the 3RT1016-1AN22 is a contactor with a coil, while the 3RH1431-1AN20 is an auxiliary contactor block — it has no coil and is intended to be mounted alongside or on top of a contactor. Verify the wiring plan: the 3RH1431-1AN20 provides 3 NO auxiliary contacts only, no main power poles.

MPN
3RH1431-1AN20