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Siemens 3RH2131-1AM20 — Contactors

Siemens SIRIUS 3RH2131-1AM20 Auxiliary Contactor, 3 NO Conta

MPN3RH2131-1AM20
Active

Siemens SIRIUS auxiliary contactor, size S00, 3 NO instantaneous contacts, 208 VAC 50/60 Hz coil, screw and snap-on 35 mm DIN rail mounting, 45 mm width.

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

Specifications

3RH2131-1AM20 — Identification
ParameterValue
Contactor frame sizeS00
3RH2131-1AM20 — 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
3RH2131-1AM20 — Control & Coil
ParameterValue
Control supply voltage typeAC
Rated value @ 50 Hz0.8 ... 1.1
Rated value @ 50 Hz208 V
3RH2131-1AM20 — Contacts & Poles
ParameterValue
Auxiliary contact reliability1 faulty switching per 100 million (17 V, 1 mA)
3RH2131-1AM20 — 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
3RH2131-1AM20 — Durability
ParameterValue
Durability (operating cycles, typ.)30 000 000
Durability with aux. switch block (cycles, typ.)10 000 000
3RH2131-1AM20 — Environmental
ParameterValue
Operating temperature range-25 ... +60 °C
Storage temperature range-55 ... +80 °C
Installation altitude, max.2 000 m
3RH2131-1AM20 — Mechanical
ParameterValue
Width45 mm
Height57.5 mm
Depth73 mm
3RH2131-1AM20 — Specifications
ParameterValue
At AC4 ... 15 ms

Product details

It carries three normally-open instantaneous contacts, each rated 10 A at both 24 V and 230 V, so it handles typical 24 VDC PLC inputs and 230 VAC pilot-duty loads without derating. The coil is wound for 208 V at 50 Hz and 60 Hz, with an operating range of 0.8 to 1.1 times rated voltage at 50 Hz and 0.85 to 1.1 at 60 Hz — meaning it picks up reliably even if the control transformer sags to about 166 V. The contactor is physically sized as S00 — the smallest SIRIUS frame — at 45 mm wide, 57.5 mm tall, and 73 mm deep.

The electrical endurance depends on the switched load: at 24 V it handles 10 A, at 110 V it drops to 3 A, and at 230 V it is still 10 A — note that the 230 V rating matches the 24 V rating, which is unusual and means the contacts are generously sized for AC resistive loads at that voltage. Wire termination accepts two conductors per clamp: 2x 0.5 to 1.5 mm² solid or stranded, 2x 0.75 to 2.5 mm², or a single 4 mm².

Frequently asked questions

What is the closest functional alternative to 3RH2131-1AM20?

The 3RT1016-1AN22 is a power contactor from the same SIRIUS S00 family, but it is a different device — a main contactor with a coil for a different voltage. The 3RH2131-1AM20 is specifically an auxiliary contactor with 3 NO contacts and a 208 VAC coil. If you need a direct functional replacement within the same family, the 3RH2131-1AM20 is the current active part; there is no identical second-source from another brand that drops in without rewiring.

What are the key dimensions of 3RH2131-1AM20?

Width is 45 mm, height is 57.5 mm, depth is 73 mm. It is the S00 frame size.

What compliance documentation is available for 3RH2131-1AM20?

The part carries RoHS and REACH compliance, with a substance prohibitance date of October 2009. It is rated for pollution degree 3 per IEC 60947-1.

MPN
3RH2131-1AM20