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Siemens 3RV5901-1A — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV5901-1A SIRIUS Lateral Auxiliary Switch, 1 NO + 1

MPN3RV5901-1A

Siemens SIRIUS lateral auxiliary switch, 1 NO + 1 NC, 10 A max, 9.5 mm wide, for circuit breaker sizes S00, S0, S2, S3, screw terminals, IP20.

StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jul 2026

Specifications

Identification

3RV5901-1A — Identification
ParameterValue
SeriesSIRIUS
Product designationauxiliary switch, lateral
Frame sizeS00, S0, S2, S3

Mechanical

3RV5901-1A — Mechanical
ParameterValue
Height90mm
Width9.5mm
Depth70mm
Mounting methodplug-in fixing

Environmental

3RV5901-1A — Environmental
ParameterValue
Operating temperature-20 ... +60°C
Storage temperature-50 ... +80°C

Specifications

3RV5901-1A — Specifications
ParameterValue
Design Of The Productlateral auxiliary switches

Product details

Switching capacity — what the ratings mean for your control circuit

The contacts are rated for 10 A maximum, but that figure is tied to specific voltage and duty conditions. At 24 V the switch handles 2 A; at 230 V it handles 4 A; at 400 V it handles 3 A; at 690 V it handles 10 A. The AC-15 rating at 690 V is 1 A — that's the inductive-load rating for solenoid and contactor coils, which is the real-world limit for most control circuits at that voltage. For lower-voltage DC or resistive loads, the 24 V / 2 A figure is the one to size by. The 110 V and 220 V ratings (0.5 A and 0.25 A respectively) cover the older control-voltage standards still common in retrofit work.

Mounting and wiring

Fastening is plug-in fixing — it snaps onto the side of the breaker without tools. Screw-type terminals accept two conductors per clamp: 2x (0.5 to 1.5 mm²) and 2x (0.75 to 2.5 mm²), or 2x (20 to 14 AWG). The front is finger-safe per IEC 60529 (IP20), so it meets the touch-protection requirement for exposed panel wiring. Operating temperature range is -20 to +60 °C; storage range is -50 to +80 °C. Dimensions: 90 mm high, 9.5 mm wide, 70 mm deep.

Frequently asked questions

What circuit breaker sizes does the 3RV5901-1A fit?

It fits SIRIUS circuit breaker frame sizes S00, S0, S2, and S3.

What is the contact configuration on 3RV5901-1A?

One normally-open and one normally-closed instantaneous contact (1 NO + 1 NC).

Where can I buy 3RV5901-1A?

The part is sourced and quoted to order against an RFQ through independent distribution channels, with availability and current pricing confirmed at quote time.

What is the maximum switching current for 3RV5901-1A?

The maximum rating is 10 A, achieved at 690 V. At 230 V it handles 4 A; at 24 V it handles 2 A. The AC-15 inductive rating at 690 V is 1 A.

MPN
3RV5901-1A