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Siemens 3RV2021-1BA25 — Motor Protection Circuit Breakers (MPCB)

Siemens 3RV2021-1BA25 SIRIUS Motor Protection Circuit Breake

MPN3RV2021-1BA25
Active

Siemens SIRIUS 3RV2021-1BA25, motor protection circuit breaker, 2 A at 480 V, 100 kA SCCR at 400 V, Trip Class 10, screw and snap-on DIN rail mount.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

3RV2021-1BA25 — Identification
ParameterValue
SeriesSIRIUS
Product designationCircuit breaker
Frame sizeS0
3RV2021-1BA25 — Electrical
ParameterValue
Rated operational current (Ie)2 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
3RV2021-1BA25 — Protection & Tripping
ParameterValue
Overload release setting range1.4 ... 2 A
Instantaneous short-circuit trip current26 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
3RV2021-1BA25 — 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
3RV2021-1BA25 — Connections
ParameterValue
Main-circuit terminal typespring-loaded terminals
Main-circuit connector arrangementTop and bottom
Conductor cross-section, solid / stranded2x (0.5 ... 2.5 mm²)
Conductor cross-section, finely stranded with ferrule2x (0.5 ... 1.5 mm²)
Conductor range, AWG (main contacts)2x (18 ... 8)
3RV2021-1BA25 — Mechanical
ParameterValue
Height119 mm
Width45 mm
Depth97 mm
Mounting methodscrew and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715
Mounting positionany
3RV2021-1BA25 — 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
3RV2021-1BA25 — Specifications
ParameterValue
Design Of The ProductFor motor protection

Product details

Rated 2 A at 480 V and 2 A at 600 V, it delivers 100 kA SCCR at 400 V and 240 V — enough to coordinate with most downstream contactors in a standard MCC lineup. The spring-loaded terminals accept 2x 0.5…2.5 mm² solid or stranded, and the breaker mounts via screw or snap-on onto 35 mm DIN rail per DIN EN 60715. Ground fault detection is not included; if ground-fault protection is required, add a separate RCD or GFCI module upstream.

Minimum clearance to adjacent components: 50 mm upwards, 50 mm downwards, 30 mm at the side, and 0 mm forwards and backwards — meaning it can be mounted flush against the back panel and enclosure door, saving rail space in a tight cabinet.

Switching capacity and auxiliary contacts

Auxiliary contact ratings: 1 A at 24 V, 0.5 A at 120 V/125 V/230 V, and 0.15 A at 60 V — these are the current-carrying limits for the built-in auxiliary switch, not the main motor circuit. The main circuit is rated for 100 kA SCCR at 240 V, 400 V, and 500 V, dropping to 10 kA at 690 V. Maximum switching frequency is 15 operations per hour under AC-3 and AC-3e duty — fine for a pump or fan cycling a few times an hour, not for a high-cycle conveyor.

Frequently asked questions

Where can I buy 3RV2021-1BA25 and how do I get a price?

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

Will 3RV2021-1BA25 drop into a panel specified for 3RV2021-1GA25 without rewiring?

Both breakers share the same 45 mm width, 97 mm depth, and DIN rail mounting, so physical fit is identical. The 3RV2021-1BA25 is rated 2 A at 480 V; the 3RV2021-1GA25 carries a different current rating. Verify the load current matches the breaker's rating before substitution.

What compliance documentation does Siemens provide for 3RV2021-1BA25?

Siemens SIRIUS breakers typically carry UL, CSA, CE, and IEC certifications. Specific documentation (RoHS, REACH, UL file number) is available on request at quote time.

MPN
3RV2021-1BA25