Rated 32 A at 480 V and 32 A at 600 V, with a breaking capacity of 25 kA at 400 V AC. At 240 V AC the interrupting rating reaches 100 kA, giving plenty of headroom for high-fault panels downstream of a large transformer. Built-in phase failure detection means the breaker trips on loss of one phase — a common failure mode that single-element overload relays can miss, and one that causes single-phasing damage on delta-connected motors.
Siemens 3RV2021-4EA40 SIRIUS Motor Protection Circuit Breake
MPN3RV2021-4EA40
Siemens SIRIUS 3RV2021-4EA40 motor protection circuit breaker, 32 A rated current at 480 V, 25 kA breaking capacity at 400 V, Class 10 trip class, screw and snap-on mounting on 35 mm DIN rail.
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Specifications
| Parameter | Value |
|---|---|
| Series | SIRIUS |
| Product designation | Circuit breaker |
| Frame size | S0 |
| Parameter | Value |
|---|---|
| Rated operational current (Ie) | 32 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) | 13.25 W |
| Power loss, per pole (AC, hot) | 4.4 W |
| Parameter | Value |
|---|---|
| Overload release setting range | 27 ... 32 A |
| Instantaneous short-circuit trip current | 400 A |
| Trip class | CLASS 10 |
| Breaking capacity at 240 V (AC) | 100 kA |
| Breaking capacity at 400 V (AC) | 55 kA |
| Breaking capacity at 500 V (AC) | 10 kA |
| Breaking capacity at 690 V (AC) | 4 kA |
| Breaking capacity at 240 V | 100 kA |
| Breaking capacity at 690 V | 2 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 | Ring cable lug connection |
| Main-circuit connector arrangement | Top and bottom |
| 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
Will 3RV2021-4EA40 drop into a panel specified around 3RV2021-4NA25?
Both are SIRIUS 3RV2 frame breakers with the same 45 mm width and DIN-rail mounting, so the footprint and rail position are identical. The difference is in the trip setting range and breaking capacity — verify your motor FLA and available fault current before substituting.
What compliance documentation does Siemens provide for 3RV2021-4EA40?
Standard Siemens SIRIUS documentation package includes CE declaration of conformity, UL/CSA recognition, and RoHS/REACH compliance declarations. Specific document numbers are available on request.
MPN
3RV2021-4EA40