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Siemens 3RV1321-1GC10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1321-1GC10 SIRIUS Circuit Breaker, 6.3 A, 100 kA

MPN3RV1321-1GC10

Siemens SIRIUS 3RV1321-1GC10 circuit breaker, 6.3 A continuous rated current, 100 kA breaking capacity at 400 V AC, for starter combinations, screw terminals, 45 mm width, DIN rail mount.

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

Specifications

3RV1321-1GC10 — Identification
ParameterValue
SeriesSIRIUS
Product designationcircuit breaker
3RV1321-1GC10 — 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
3RV1321-1GC10 — 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)6 kA
Phase-failure detectionNo
Ground-fault detectionNo
3RV1321-1GC10 — Endurance & Switching
ParameterValue
Endurance, main contacts (typ.)100 000
Switching frequency, AC-3 (max.)15 1/h
3RV1321-1GC10 — 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)
3RV1321-1GC10 — Mechanical
ParameterValue
Height97 mm
Width45 mm
Depth96 mm
Mounting positionany
3RV1321-1GC10 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
3RV1321-1GC10 — Specifications
ParameterValue
Design Of The Productfor starter combinations

Product details

What this breaker does in the panel

The Siemens 3RV1321-1GC10 is a SIRIUS circuit breaker designed for starter combinations — it protects the motor branch against short circuits and overloads in one compact package. Rated 6.3 A continuous, it handles the inrush and running current of smaller three-phase motors up to 2.2 kW at 400 V.

Zero clearance needed at the sides or back, so you can pack breakers tight in a row. Screw terminals accept 2x 1–2.5 mm² solid or stranded, or 2x 2.5–6 mm² — typical for 6.3 A motor feeds.

The 100 kA rating holds at 240 V, 400 V, and 500 V AC — that's a Type 2 coordination level with most SIRIUS contactors, meaning the contactor stays operational after a fault. The 6 kV rated surge voltage gives it a solid impulse withstand for industrial environments with switching transients.

Front face is IP20 — finger-safe but not washdown-rated, so keep it inside the enclosure. Shock rated at 25g for 11 ms, which covers most industrial vibration from contactors and drives in the same panel. Mechanical endurance is 100,000 operations on the main contacts — that's a long service life for a motor protection breaker in normal cycling.

Frequently asked questions

What is the breaking capacity of 3RV1321-1GC10?

100 kA at 240 V, 400 V, and 500 V AC. At 690 V AC it drops to 6 kA. That 100 kA rating at 400 V is the figure that matters for most industrial panels fed from a typical 400 V transformer.

Where can I buy 3RV1321-1GC10?

Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time. Submit an RFQ for this order code and we'll respond with a firm quote.

Will 3RV1321-1GC10 drop into a panel designed for 3RV6011-0CA10?

Both are 45 mm wide three-pole SIRIUS breakers on the same DIN rail footprint, so the physical swap is straightforward. However, the 3RV6011-0CA10 is a different current rating and breaking capacity class — verify the motor FLA and available fault current against the 3RV1321-1GC10's 6.3 A continuous and 100 kA at 400 V before substituting. The terminal sizes and screw-type connections are the same, so no rewiring of the lugs is needed.

What compliance documentation is available for 3RV1321-1GC10?

As a Siemens SIRIUS product, it carries CE marking for the European market and is designed to IEC/EN 60947 standards for circuit breakers. RoHS and REACH compliance documentation is standard for current-production SIRIUS components. Specific declarations can be provided with the order.

MPN
3RV1321-1GC10