Screw-type terminals on the main circuit accept 2×(1…2.5 mm²) or 2×(2.5…10 mm²) solid or stranded copper — no ferrule required for the larger range. M4 contact screws take a 5–6 mm diameter screwdriver shaft. Rated operational power at 230 V is 0.1 kW. The gL/gG fuse backup at 690 V is rated 4 A for coordination. Maximum switching frequency under AC-3 duty is 15 operations per hour.
Siemens 3RV2021-0FA10 SIRIUS Motor Protection Circuit Breake
MPN3RV2021-0FA10
Active
Siemens SIRIUS 3RV2021-0FA10 motor protection circuit breaker, size S0, screw-type terminals, 100 kA breaking capacity at 400 V AC, Trip Class 10, 45 mm wide, 97 mm deep.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Series | SIRIUS |
| Product designation | Circuit breaker |
| Frame size | S0 |
| Parameter | Value |
|---|---|
| Rated operational current (Ie) | 0.5 A |
| Rated voltage | 20 ... 690 V |
| Rated voltage, AC-3 (max.) | 690 V |
| Rated frequency | 50 ... 60 Hz |
| Rated insulation voltage (Ui), pollution degree 3 | 690 V |
| Rated impulse withstand voltage (Uimp) | 6 kV |
| Number of poles | 3 |
| Power loss (AC, hot) | 5.5 W |
| Power loss, per pole (AC, hot) | 1.8 W |
| Parameter | Value |
|---|---|
| Overload release setting range | 0.35 ... 0.5 A |
| Instantaneous short-circuit trip current | 6.5 A |
| Trip class | CLASS 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 V | 100 kA |
| Breaking capacity at 690 V | 100 kA |
| Short-circuit trip type | magnetic |
| Overload release type | thermal |
| Short-circuit protection | Yes |
| Phase-failure detection | Yes |
| Ground-fault detection | No |
| Auxiliary switch extendable | Yes |
| Parameter | Value |
|---|---|
| Endurance, main contacts (typ.) | 100 000 |
| Endurance, auxiliary contacts (typ.) | 100 000 |
| Switching frequency, AC-3 (max.) | 15 1/h |
| Auxiliary CO (changeover) contacts | 0 |
| Parameter | Value |
|---|---|
| Main-circuit terminal type | screw-type terminals |
| Main-circuit connector arrangement | Top and bottom |
| Conductor cross-section, solid / stranded | 2x (1 ... 2.5 mm²), 2x (2.5 ... 10 mm²) |
| Conductor cross-section, finely stranded with ferrule | 2x (1 ... 2.5 mm²), 2x (2.5 ... 6 mm²), 1x 10 mm² |
| Parameter | Value |
|---|---|
| Height | 97 mm |
| Width | 45 mm |
| Depth | 97 mm |
| Mounting method | screw and snap-on mounting onto 35 mm DIN rail according to DIN EN 60715 |
| Mounting position | any |
| Parameter | Value |
|---|---|
| Operating temperature | -20 ... +60 °C |
| Storage temperature | -50 ... +80 °C |
| Transport temperature | -50 ... +80 °C |
| Relative humidity (operation) | 10 ... 95 % |
| Max. installation altitude | 2 000 m |
| Parameter | Value |
|---|---|
| Design Of The Product | For motor protection |
Product details
Frequently asked questions
Where can I buy the 3RV2021-0FA10?
This part is sourced and quoted to order against an RFQ through our independent distribution network. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm commitment.
Will the 3RV2021-0FA10 drop into a panel specified around the 3RV2011-0AA10 without rewiring?
Both are S0-frame Siemens SIRIUS breakers with the same 45 mm width and DIN rail mounting, so the mechanical fit is identical. However, the 3RV2021-0FA10 carries a 100 kA breaking capacity at 400 V versus the 3RV2011-0AA10's lower rating — verify that the panel's SCCR and the motor FLA match this unit's trip curve before swapping.
What are the key ratings for this motor protection circuit breaker?
Key ratings: 100 kA breaking capacity at 400 V AC, Trip Class 10, phase failure detection, size S0, 45 mm wide, 97 mm deep, operating ambient -20 to +60 °C.
MPN
3RV2021-0FA10