Siemens SIRIUS 3RV2021-4EA10-ZW97 motor-protective circuit breaker, Class 10 trip, 45 mm wide, 97 mm depth, screw terminals, DIN-rail mount.
| 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 | 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 |
This breaker delivers 100 kA breaking capacity at 240 V, 25 kA at 400 V, 5 kA at 500 V, and 2 kA at 690 V. Motor horsepower ratings span 2 hp at 110/120 V up to 20 hp at 460/480 V, with a 5 hp rating at 230 V and 10 hp at 220/230 V.
Required clearances: 50 mm upward and downward, 30 mm to the side, zero forward or backward. The M4 main contact terminals accept 2×(1–2.5 mm²) or 2×(2.5–10 mm²) solid or stranded wire.
It is a Class 10 motor-protective circuit breaker with 100 kA breaking capacity at 240 V, 25 kA at 400 V, and motor ratings up to 20 hp at 460/480 V. It includes phase failure detection and mounts on a 35 mm DIN rail.
This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
The 3RV2021-4NA25 is a peer in the same SIRIUS family. Both are Class 10 motor-protective breakers with similar DIN-rail footprint, but the 4NA25 variant may have different breaking capacity or accessory options — verify the specific ratings against your BOM before substituting.
Alternative models and sibling configurations in the same Siemens series. For obsolete or discontinued parts, these models can serve as compatible replacements or functional alternatives for plant maintenance.
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