Siemens SIRIUS 3RV2021-1HA10 motor protection circuit breaker, Class 10, 100 kA interrupting capacity at 400 V AC, 45 mm wide, screw and snap-on 35 mm DIN rail mounting.
| Parameter | Value |
|---|---|
| Series | SIRIUS |
| Product designation | Circuit breaker |
| Frame size | S0 |
| Parameter | Value |
|---|---|
| Rated operational current (Ie) | 8 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) | 9.25 W |
| Power loss, per pole (AC, hot) | 3.1 W |
| Parameter | Value |
|---|---|
| Overload release setting range | 5.5 ... 8 A |
| Instantaneous short-circuit trip current | 104 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) | 42 kA |
| Breaking capacity at 690 V (AC) | 6 kA |
| Breaking capacity at 240 V | 100 kA |
| Breaking capacity at 690 V | 4 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 |
| Conductor range, AWG (main contacts) | 2x (16 ... 12), 2x (14 ... 8) |
| 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 |
The Siemens 3RV2021-1HA10 is a SIRIUS motor-protection circuit breaker designed for Class 10 trip characteristics, meaning it will open within 10 seconds under a locked-rotor condition — matching the thermal curve of standard IEC induction motors up to about 5 hp at 460/480 V.
Any mounting position is permitted. Main circuit terminals accept 2x (1 to 2.5 mm²) or 2x (2.5 to 10 mm²) solid or stranded copper, M4 screw-type.
This part is sourced to order against an RFQ through independent distribution. Submit an RFQ to confirm availability and current pricing.
Both are 45 mm wide SIRIUS motor-protection breakers on the same DIN-rail footprint, so mechanical fit is identical. However, the 3RV2021-1FA15 may have a different trip current or interrupting rating — verify the specific settings before substitution.
Siemens SIRIUS products typically carry UL, CSA, CE, and IEC certifications. Specific documentation (RoHS, REACH, UL file) is available on request with an RFQ.
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