Width is 45 mm, depth 97 mm, height 97 mm — a standard 45 mm module that fits a 35 mm DIN rail per DIN EN 60715. The mounting method is screw and snap-on, so it clips onto the rail and can be screwed down for vibration environments. Clearances: 70 mm upward and downward, 30 mm at the side. That side clearance is tight enough that adjacent breakers can sit without forced spacing, but the 70 mm vertical is the minimum for cable bend radius and heat dissipation. Screw-type terminals for the main circuit, accepting 2x (0.5...1.5 mm²) or 2x (0.75...2.5 mm²) solid or stranded.
Siemens 3RV2021-4PA15-ZX95 SIRIUS Motor Protection Circuit B
MPN3RV2021-4PA15-ZX95
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Siemens SIRIUS 3RV2021-4PA15-ZX95 motor protection circuit breaker, Trip Class 10, 45 mm width, 10 kA breaking capacity at 400 V, phase failure detection, screw and snap-on DIN rail mounting.
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
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Worldwide DispatchDHL/FedEx — transit quoted per order
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 |
|---|---|
| Overload release setting range | 30 ... 36 A |
| Instantaneous short-circuit trip current | 432 A |
| Trip class | CLASS 10 |
| 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 |
| 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 (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) |
| Conductor cross-section, finely stranded with ferrule | 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 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 motor protection |
Product details
Frequently asked questions
Where can I buy 3RV2021-4PA15-ZX95?
This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
What is the breaking capacity of 3RV2021-4PA15-ZX95?
The breaking capacity is 10 kA at 400 V. It also carries ratings of 100 kA at 240 V, 3 kA at 500 V, and 2 kA at 690 V.
Does 3RV2021-4PA15-ZX95 detect phase failure?
Yes, phase failure detection is built in. It will trip if one phase is lost, protecting the motor from single-phasing.
MPN
3RV2021-4PA15-ZX95