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Siemens 3RV2021-1CA10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2021-1CA10 SIRIUS Motor Protection Circuit Breake

MPN3RV2021-1CA10
Active

Siemens SIRIUS 3RV2021-1CA10 motor protection circuit breaker, CLASS 10, screw/snap-on 35 mm DIN rail, 100 kA SCCR at 400 V AC.

$83.00Ref. price · indicative, final on quote
Siemens 3RV2021-1CA10 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RV2021-1CA10 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2021-1CA10 — Electrical
ParameterValue
Rated operational current (Ie)2.5 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)7.25 W
Power loss, per pole (AC, hot)2.4 W
3RV2021-1CA10 — Protection & Tripping
ParameterValue
Overload release setting range1.8 ... 2.5 A
Instantaneous short-circuit trip current33 A
Trip classCLASS 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)10 kA
Breaking capacity at 240 V100 kA
Breaking capacity at 690 V10 kA
Short-circuit trip typemagnetic
Overload release typethermal
Short-circuit protectionYes
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV2021-1CA10 — 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
3RV2021-1CA10 — 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)
3RV2021-1CA10 — 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
3RV2021-1CA10 — 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
3RV2021-1CA10 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

The 3RV2021-1CA10: Its CLASS 10 trip class means it will trip within 10 seconds at 7.2× the thermal setting, which is the standard for protecting standard induction motors during start-up — it lets the motor accelerate without nuisance tripping on inrush.

Main circuit terminals are M4 screw-type, accepting 2×(1…2.5 mm²) or 2×(2.5…10 mm²) solid or stranded copper. Keep the strip length clean to avoid stray strands under the screw head. Clearance: 50 mm above and below, 30 mm to the side, 0 mm forward or backward — so you can pack it tight front-to-back in a shallow enclosure.

Short-circuit ratings — what they mean for coordination

Rated short-circuit breaking capacity is 100 kA at 240 V, 400 V, and 500 V AC, dropping to 10 kA at 690 V AC.

The 3RV2021-1CA10 is a drop-in replacement for panels designed around the SIRIUS 3RV2 family.

Frequently asked questions

What are the key dimensions for panel layout?

Width 45 mm, height 97 mm, depth 97 mm. Requires 50 mm clearance above and below, 30 mm to the side, and 0 mm forward/backward.

Does it detect phase failure?

Yes, phase failure detection is included.

MPN
3RV2021-1CA10