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Siemens 3RV2021-4AA10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2021-4AA10 SIRIUS Motor Protection Circuit Breake

MPN3RV2021-4AA10
Active

Siemens SIRIUS motor protection circuit breaker, 3RV2021-4AA10, 16 A rated at 480/600 V, 100 kA breaking capacity at 240 V, Class 10 trip, screw terminals, DIN rail mount.

$107.65Ref. price · indicative, final on quote
Siemens 3RV2021-4AA10 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RV2021-4AA10 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2021-4AA10 — Electrical
ParameterValue
Rated operational current (Ie)16 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)9.25 W
Power loss, per pole (AC, hot)3.1 W
3RV2021-4AA10 — Protection & Tripping
ParameterValue
Overload release setting range10 ... 16 A
Instantaneous short-circuit trip current208 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
3RV2021-4AA10 — 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
3RV2021-4AA10 — 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)
3RV2021-4AA10 — 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
3RV2021-4AA10 — 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
3RV2021-4AA10 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

Rated continuous current is 16 A at both 480 V and 600 V, so it covers standard 10 hp (460/480 V) and 5 hp (220/230 V) motor loads. Breaking capacity hits 100 kA at 240 V, 25 kA at 400 V, 5 kA at 500 V, and 2 kA at 690 V — enough for most industrial panel fault levels without an upstream fuse.

Mounting position is any orientation. Required clearances: 50 mm above and below, 30 mm to the side, zero forward and backward — tight enough for dense DIN-rail layouts. Terminals accept 2×(1–2.5 mm²) or 2×(2.5–10 mm²) solid or stranded copper. Main contact screws are M4.

Environmental limits

The voltage rating spans 20 to 690 V, covering most low-voltage motor circuits.

Frequently asked questions

What are the key ratings for this motor protection circuit breaker?

Continuous current 16 A at 480/600 V, breaking capacity 100 kA at 240 V, 25 kA at 400 V, 5 kA at 500 V, 2 kA at 690 V. Trip Class 10. Phase failure detection included.

What are the mounting dimensions and clearances?

Width 45 mm, depth 97 mm, height 97 mm. Clearances: 50 mm above and below, 30 mm sides, zero front and back. Mounts on 35 mm DIN rail per DIN EN 60715.

MPN
3RV2021-4AA10