Skip to main content
Log in
Siemens 3RV1321-1HC10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1321-1HC10 SIRIUS Circuit Breaker, 8 A, 100 kA at

MPN3RV1321-1HC10

Siemens SIRIUS circuit breaker for starter combinations, 3RV1321-1HC10, 3-pole, 8 A continuous rated current, 100 kA breaking capacity at 400 V AC, IP20 front, screw terminals, DIN rail snap-on.

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

Specifications

3RV1321-1HC10 — Identification
ParameterValue
SeriesSIRIUS
Product designationcircuit breaker
3RV1321-1HC10 — 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)9.25 W
Power loss, per pole (AC, hot)3.1 W
3RV1321-1HC10 — 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)42 kA
Breaking capacity at 690 V (AC)6 kA
Phase-failure detectionNo
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV1321-1HC10 — Endurance & Switching
ParameterValue
Auxiliary CO (changeover) contacts0
3RV1321-1HC10 — 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)
Conductor range, AWG (main contacts)2x (14 ... 10)
3RV1321-1HC10 — Mechanical
ParameterValue
Height97 mm
Width45 mm
Depth96 mm
Mounting methodscrew and snap-on mounting onto 35 mm standard mounting rail according to DIN EN 50022
Mounting positionany
3RV1321-1HC10 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
Max. installation altitude2 000 m
3RV1321-1HC10 — Specifications
ParameterValue
Design Of The Productfor starter combinations

Product details

SIRIUS 3RV1321-1HC10 — motor-protective circuit breaker for starter combinations

Its continuous rated current of 8 A and motor rating of 3 kW at 400 V AC make it a fit for small to medium induction motors on pumps, fans, or conveyors. The unit occupies a 45 mm width.

Terminals accept solid and stranded conductors: 2x (1... 2.5 mm²) and 2x (2.5... 6 mm²) per clamp, with AWG equivalents of 2x (14... 10). The screw-type main and auxiliary terminals are standard for panel wiring — no special tooling needed. Depth is 96 mm, height 97 mm, with zero clearance required at the back and sides — so it sits flush against the DIN rail without extra spacing.

MPN
3RV1321-1HC10