The Siemens 3RV2321-4PC10 is a SIRIUS circuit breaker designed for starter combinations — meaning it integrates directly into a motor starter assembly, providing short-circuit and overload protection in one compact package. The 97 mm depth and height keep the profile tight for shallow enclosures. Terminals accept solid or stranded conductors: 2x 1–2.5 mm² or 2x 2.5–10 mm², with M4 screw-type connections on the main contacts. No ground-fault or phase-failure detection onboard — this is a straightforward thermal-magnetic or electronic trip unit for motor overload and short-circuit protection only.
Siemens 3RV2321-4PC10 SIRIUS Circuit Breaker, 10 kA at 400 V
MPN3RV2321-4PC10
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Siemens SIRIUS circuit breaker for starter combinations, 3RV2321-4PC10, 45 mm wide, 10 kA interrupting capacity at 400 V AC, screw-type terminals, DIN-rail snap-on mounting.
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Independent China distributor & sourcing agent· Listing updated Sep 2026
Specifications
| Parameter | Value |
|---|---|
| Series | SIRIUS |
| Product designation | Circuit breaker |
| Frame size | S0 |
| Parameter | Value |
|---|---|
| Rated operational current (Ie) | 36 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) | 16.25 W |
| Power loss, per pole (AC, hot) | 5.4 W |
| Parameter | Value |
|---|---|
| Instantaneous short-circuit trip current | 468 A |
| Breaking capacity at 240 V (AC) | 100 kA |
| Breaking capacity at 400 V (AC) | 20 kA |
| Breaking capacity at 500 V (AC) | 6 kA |
| Breaking capacity at 690 V (AC) | 3 kA |
| Breaking capacity at 240 V | 100 kA |
| Breaking capacity at 690 V | 2 kA |
| Short-circuit trip type | magnetic |
| Short-circuit protection | Yes |
| Phase-failure detection | No |
| 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 standard mounting rail according to DIN EN 60715 |
| Mounting position | any |
| Parameter | Value |
|---|---|
| Operating temperature | -20 ... +40 °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 starter combinations |
Product details
Frequently asked questions
What is 3RV2321-4PC10's listed depth and width?
Depth is 97 mm, width is 45 mm, height is 97 mm — a standard 45 mm modular footprint for DIN-rail mounting.
MPN
3RV2321-4PC10