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Siemens 3RV2021-4PA10 — Motor Protection Circuit Breakers (MPCB)

Siemens SIRIUS 3RV2021-4PA10 Motor Protection Breaker, 45mm,

MPN3RV2021-4PA10
Active

Siemens SIRIUS 3RV2021-4PA10 motor protection circuit breaker, 45 mm width, Class 10 trip class, 100 kA breaking capacity at 240 V AC.

$73.66Ref. price · indicative, final on quote
Siemens 3RV2021-4PA10 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RV2021-4PA10 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2021-4PA10 — Electrical
ParameterValue
Rated operational current (Ie)36 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)16.25 W
Power loss, per pole (AC, hot)5.4 W
3RV2021-4PA10 — Protection & Tripping
ParameterValue
Overload release setting range30 ... 36 A
Instantaneous short-circuit trip current432 A
Trip classCLASS 10
Breaking capacity at 240 V (AC)100 kA
Breaking capacity at 400 V (AC)20 kA
Breaking capacity at 500 V (AC)6 kA
Breaking capacity at 690 V (AC)3 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
3RV2021-4PA10 — 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
3RV2021-4PA10 — 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
3RV2021-4PA10 — 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
3RV2021-4PA10 — Environmental
ParameterValue
Operating temperature-20 ... +40 °C
Storage temperature-50 ... +80 °C
Transport temperature-50 ... +80 °C
Relative humidity (operation)10 ... 95 %
Max. installation altitude2 000 m
3RV2021-4PA10 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

What it does and where it fits

It fits into control panels under IEC and UL standards.

Width is 45 mm, depth 97 mm, height 97 mm — a compact footprint for DIN-rail layouts. Mounting can be screw-fixed or snapped onto 35 mm rail per DIN EN 60715, in any orientation. Clearance requirements: 70 mm above and below, 30 mm to the sides, zero forward or backward. This simplifies cabinet layout planning. Terminals accept 2x 1–2.5 mm² or 2x 2.5–10 mm² solid or stranded wire via screw-type terminals (M4 main contacts).

MPN
3RV2021-4PA10