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Siemens 3RV1321-1BC10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1321-1BC10 SIRIUS Circuit Breaker, 2 A, 0.75 kW a

MPN3RV1321-1BC10

Siemens SIRIUS 3RV1321-1BC10 circuit breaker for starter combinations, 3-pole, 2 A rated continuous current, 0.75 kW at 400 V AC-3, screw terminals, 45 mm width, DIN rail mount.

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

Specifications

3RV1321-1BC10 — Identification
ParameterValue
SeriesSIRIUS
Product designationcircuit breaker
3RV1321-1BC10 — Electrical
ParameterValue
Rated voltage690 V
Rated voltage, AC-3 (max.)690 V
Rated impulse withstand voltage (Uimp)6 000 V
Number of poles3
Power loss (AC, hot)7.25 W
Power loss, per pole (AC, hot)2.4 W
3RV1321-1BC10 — Protection & Tripping
ParameterValue
Breaking capacity at 240 V (AC)100 kA
Breaking capacity at 400 V (AC)100 kA
Breaking capacity at 500 V (AC)100 kA
Breaking capacity at 690 V (AC)8 kA
Phase-failure detectionNo
Ground-fault detectionNo
3RV1321-1BC10 — Endurance & Switching
ParameterValue
Endurance, main contacts (typ.)100 000
Switching frequency, AC-3 (max.)15 1/h
3RV1321-1BC10 — Connections
ParameterValue
Main-circuit terminal typescrew-type terminals
Main-circuit connector arrangementfront side
Conductor cross-section, finely stranded with ferrule2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²)
3RV1321-1BC10 — Mechanical
ParameterValue
Height97 mm
Width45 mm
Depth96 mm
Mounting positionany
3RV1321-1BC10 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
Max. installation altitude2 000 m
3RV1321-1BC10 — Specifications
ParameterValue
Design Of The Productfor starter combinations

Product details

SIRIUS 3RV1321-1BC10 — motor-protective circuit breaker for starter combinations

Rated 2 A continuous and 0.75 kW at 400 V AC-3, it handles small motor loads (pumps, fans, conveyors) in a 45 mm wide package that snaps onto 35 mm DIN rail per EN 50022.

The 100 000 mechanical cycles typical on the main contacts match the duty life of a contactor in the same starter combination.

Termination and panel fit

Solid and stranded conductors: 2x (1 … 2.5 mm²) or 2x (2.5 … 6 mm²) per clamp. AWG equivalents for main contacts: 2x (14 … 10). Mounting position any, zero clearance needed at the sides or rear — 45 mm wide, 97 mm tall, 96 mm deep. IP20 finger-safe on the front; store or ship between -50 and +80 °C, operate between -20 and +60 °C. Shock rated 25g / 11 ms.

Frequently asked questions

What is the breaking capacity of 3RV1321-1BC10 at 400 V?

100 kA at 400 V AC, same as at 240 V and 500 V. At 690 V it drops to 8 kA.

Where can I buy 3RV1321-1BC10 and how is it quoted?

Sourced to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for your quantity.

What is the motor rating of 3RV1321-1BC10?

0.75 kW at 400 V AC-3, with a rated continuous current of 2 A.

Does 3RV1321-1BC10 include an auxiliary contact?

Yes, it has an auxiliary switch built in, though the number of auxiliary contacts for the main circuit is listed as 0 — the auxiliary switch is separate.

MPN
3RV1321-1BC10