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Siemens 3RV2021-0CA10 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2021-0CA10 SIRIUS Motor Protection Circuit Breake

MPN3RV2021-0CA10
Active

Siemens SIRIUS, motor protection circuit breaker, 3RV2021-0CA10, Size S0, Trip Class 10, 100 kA SCCR at 400 V AC, screw-type terminals, screw and snap-on mounting on 35 mm DIN rail.

Siemens 3RV2021-0CA10 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RV2021-0CA10 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2021-0CA10 — Electrical
ParameterValue
Rated operational current (Ie)0.25 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)5.5 W
Power loss, per pole (AC, hot)1.8 W
3RV2021-0CA10 — Protection & Tripping
ParameterValue
Overload release setting range0.18 ... 0.25 A
Instantaneous short-circuit trip current3.3 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)100 kA
Breaking capacity at 240 V100 kA
Breaking capacity at 690 V100 kA
Short-circuit trip typemagnetic
Overload release typethermal
Short-circuit protectionYes
Phase-failure detectionYes
Ground-fault detectionNo
Auxiliary switch extendableYes
3RV2021-0CA10 — 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
3RV2021-0CA10 — 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)
3RV2021-0CA10 — 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
3RV2021-0CA10 — 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
3RV2021-0CA10 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

Motor protection circuit breaker for 100 kA fault levels

Trip Class 10 ensures it trips fast enough to protect standard 4-pole motors during locked-rotor starts, clearing before the rotor insulation overheats.

Screw-type terminals on the main circuit accept 2x (1 to 2.5 mm²) or 2x (2.5 to 10 mm²) solid or stranded conductors, sized for standard motor branch circuits. Clearance: 50 mm above and below, 30 mm to the sides, zero forward or backward.

Protection features and operating limits

No ground fault detection on this variant. Rated operational voltage range is 20 to 690 V. Maximum switching rate at AC-3 duty is 15 operations per hour.

The 3RV2021-0CA10 carries a current lifecycle stage per Siemens. No official successor has been published, so this remains the active order code for new designs requiring Size S0, Trip Class 10 motor protection with 100 kA SCCR.

Frequently asked questions

What is the difference between 3RV2021-0CA10 and 3RV2011-0AA10?

The 3RV2021-0CA10 is a Size S0 frame rated for 100 kA SCCR at 400 V, while the 3RV2011-0AA10 is a smaller Size S00 frame with lower interrupting capacity. The 3RV2021-0CA10 will not drop into a panel wired for S00 without rewiring, as the terminal spacing and DIN rail footprint differ.

Where can I buy 3RV2021-0CA10?

The part is sourced and quoted to order against an RFQ through independent distribution channels. Submit an RFQ for current availability and pricing.

What does Trip Class 10 mean for motor protection?

Trip Class 10 means the breaker will trip within 10 seconds at 600% of the thermal setting, matching the heating curve of standard 4-pole induction motors during locked-rotor starts.

What compliance documentation is available for 3RV2021-0CA10?

As a Siemens SIRIUS component, it carries CE marking for the European market and is designed to meet IEC/EN 60947-2 and 60947-4-1 standards. RoHS and REACH declarations are available from Siemens on request.

MPN
3RV2021-0CA10