Skip to main content
Siemens 3RV2021-4DA10 — Motor Protection Circuit Breakers (MPCB)

SIRIUS 3RV2021-4DA10 Motor Protection Circuit Breaker, CLASS

MPN3RV2021-4DA10
Active

SIRIUS 3RV2021-4DA10 motor protection circuit breaker, CLASS 10, 45 mm wide, screw-type terminals, phase failure detection, current production.

$48.26Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RV2021-4DA10 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2021-4DA10 — Electrical
ParameterValue
Rated operational current (Ie)25 A
Rated voltage20 ... 690 V
Rated voltage, AC-3 (max.)690 V
Rated frequency50 ... 60 Hz
Rated insulation voltage (Ui), pollution degree 3690 V
Rated impulse withstand voltage (Uimp)6 kV
Number of poles3
Power loss (AC, hot)10.5 W
Power loss, per pole (AC, hot)3.5 W
3RV2021-4DA10 — Protection & Tripping
ParameterValue
Overload release setting range18 ... 25 A
Instantaneous short-circuit trip current325 A
Trip classCLASS 10
Breaking capacity at 240 V (AC)100 kA
Breaking capacity at 400 V (AC)55 kA
Breaking capacity at 500 V (AC)10 kA
Breaking capacity at 690 V (AC)4 kA
Breaking capacity at 240 V100 kA
Breaking capacity at 690 V2 kA
Short-circuit trip typemagnetic
Overload release typethermal
Short-circuit protectionYes
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV2021-4DA10 — Endurance & Switching
ParameterValue
Endurance, main contacts (typ.)100 000
Endurance, auxiliary contacts (typ.)100 000
Switching frequency, AC-3 (max.)15 1/h
Auxiliary CO (changeover) contacts0
3RV2021-4DA10 — Connections
ParameterValue
Main-circuit terminal typescrew-type terminals
Main-circuit connector arrangementTop and bottom
Conductor cross-section, solid / stranded2x (1 ... 2.5 mm²), 2x (2.5 ... 10 mm²)
Conductor cross-section, finely stranded with ferrule2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²), 1x 10 mm²
Conductor range, AWG (main contacts)2x (16 ... 12), 2x (14 ... 8)
3RV2021-4DA10 — Mechanical
ParameterValue
Height97 mm
Width45 mm
Depth97 mm
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Mounting positionany
3RV2021-4DA10 — Environmental
ParameterValue
Operating temperature-20 ... +60 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
Relative humidity (operation)10 ... 95 %
Max. installation altitude2 000 m
3RV2021-4DA10 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

At 400 V, the rated short-circuit breaking capacity is 25 kA, and the gL/gG fuse backup rating is 63 A. The part is 45 mm wide and 97 mm deep.

Key Ratings & What They Mean

The screw-type terminals accept 2x (1 to 2.5 mm²) or 2x (2.5 to 10 mm²) solid or stranded wire.

Any mounting position is allowed. Required clearances: 50 mm upwards and downwards, 30 mm at the side, 0 mm forwards and backwards. No special derating needed for side-by-side mounting as long as side clearance is met.

Frequently asked questions

What is the mounting clearance required for the 3RV2021-4DA10?

Required clearances: 50 mm upwards, 50 mm downwards, 30 mm at the side, 0 mm forwards and backwards. Mounting position is any.

MPN
3RV2021-4DA10