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Siemens 3RV1021-1FA10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV1021-1FA10 SIRIUS Motor Circuit Breaker, 5 A, CLA

MPN3RV1021-1FA10

Siemens SIRIUS 3RV1021-1FA10 motor-protective circuit breaker, 5 A rated continuous current, CLASS 10 trip class, 3-pole, screw terminals, DIN rail mount.

$68.00Ref. price · indicative, final on quote

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

Specifications

3RV1021-1FA10 — Identification
Parameter	Value
Series	SIRIUS
Product designation	circuit breaker

3RV1021-1FA10 — Electrical
Parameter	Value
Rated voltage	690 V
Rated voltage, AC-3 (max.)	690 V
Rated impulse withstand voltage (Uimp)	6 000 V
Number of poles	3
Power loss (AC, hot)	7.25 W
Power loss, per pole (AC, hot)	2.4 W

3RV1021-1FA10 — Protection & Tripping
Parameter	Value
Overload release setting range	3.5 ... 5 A
Trip class	CLASS 10
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 detection	Yes
Ground-fault detection	No
Auxiliary switch extendable	Yes

3RV1021-1FA10 — Endurance & Switching
Parameter	Value
Auxiliary CO (changeover) contacts	0

3RV1021-1FA10 — Connections
Parameter	Value
Main-circuit terminal type	screw-type terminals
Main-circuit connector arrangement	front side
Conductor cross-section, finely stranded with ferrule	2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²)

3RV1021-1FA10 — Mechanical
Parameter	Value
Height	97 mm
Width	45 mm
Depth	96 mm
Mounting method	screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 50022
Mounting position	any

3RV1021-1FA10 — Environmental
Parameter	Value
Operating temperature	-20 ... +60 °C
Storage temperature	-50 ... +80 °C
Transport temperature	-50 ... +80 °C
Max. installation altitude	2 000 m

3RV1021-1FA10 — Specifications
Parameter	Value
Design Of The Product	for motor protection

Product details

The Siemens 3RV1021-1FA10 is a SIRIUS motor-protective circuit breaker rated for 5 A continuous current, switching 1.5 kW at 400 V in AC-3 duty. The 3-pole unit carries a 100 kA breaking capacity at 400 V AC, dropping to 6 kA at 690 V AC, so it handles high-fault-current panels up to that threshold.

DIN rail fit and wiring

The 45 mm wide body (3 modules wide on a standard DIN rail) leaves room for adjacent contactors or overloads in a motor starter lineup. Depth is 96 mm, height 97 mm — check gland-plate clearance if the panel is shallow. Screw-type terminals on both main and auxiliary circuits accept solid or stranded wire: 2× (1…2.5 mm²) or 2× (2.5…6 mm²) per clamp. The backwards projection is 0 mm, so it sits flush against the mounting surface.