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Siemens 3RV2021-0CA10-0DA0 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2021-0CA10-0DA0 SIRIUS 3RV2 Motor Starter Protect

MPN3RV2021-0CA10-0DA0
Active

Siemens SIRIUS 3RV2 motor starter protector, size S0, 3RV2021-0CA10-0DA0, overload range 0.18-0.25 A, short-circuit release 3.3 A, screw terminals, standard switching capacity.

Siemens 3RV2021-0CA10-0DA0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RV2021-0CA10-0DA0 — Specifications
ParameterValue
Group codeR711
Product group5333
Product classA: Standard product which is a stock item could be returned within the returns guidelines/period.
SeriesSIRIUS 3RV2 motor starter protectors
Export control regulationsAL : N / ECCN : EAR99
Compliance with the substance restrictions according to RoHS directiveSince: 01-10-09

Product details

Motor starter protector for system protection

The Siemens 3RV2021-0CA10-0DA0 is a SIRIUS 3RV2 motor starter protector in size S0, designed for system protection without phase failure protection. It combines an overload relay (A-release set at 0.18...0.25 A) and a magnetic short-circuit release (3.3 A) in one compact unit, with screw terminals and standard switching capacity. The 0.18...0.25 A overload range means this protector is sized for very small motor loads — fractional-horsepower pumps, fans, or conveyor drives drawing under a quarter amp. The 3.3 A short-circuit release clears faults quickly, protecting downstream wiring and the contactor. Mounts on a DIN rail. The S0 frame size is a common footprint across the 3RV2 family, so it shares bus-bar and auxiliary-contact layouts with other S0 breakers.

RoHS compliant since 01-10-09. REACH candidate-list information is available from Siemens on request.

Frequently asked questions

What is the closest alternative to 3RV2021-0CA10-0DA0 in the same family?

Within the SIRIUS 3RV2 family, the same S0 frame size and screw-terminal variant with a different overload range is the closest alternative. No pin-compatible direct substitute with identical ratings exists; select the overload range that matches your motor FLA.

What compliance documentation does Siemens provide for 3RV2021-0CA10-0DA0?

RoHS compliance since 01-10-09 is confirmed. REACH candidate-list information is available from Siemens. UL and IEC certifications are standard for the SIRIUS 3RV2 series.

MPN
3RV2021-0CA10-0DA0