Siemens SIRIUS circuit breaker, 3RV1421-1CA15, for transformer protection, 2.5 A continuous, Class 10, 100 kA breaking at 400 V AC, phase failure detection, DIN rail mount.
| Parameter | Value |
|---|---|
| Series | SIRIUS |
| Product designation | circuit breaker |
| Parameter | Value |
|---|---|
| Rated voltage | 690 V |
| Rated voltage, AC-3 (max.) | 690 V |
| Rated impulse withstand voltage (Uimp) | 6 000 V |
| Number of poles | 3 |
| Power loss (AC, hot) | 7.25 W |
| Power loss, per pole (AC, hot) | 2.4 W |
| Parameter | Value |
|---|---|
| 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) | 100 kA |
| Breaking capacity at 690 V (AC) | 8 kA |
| Phase-failure detection | Yes |
| Ground-fault detection | No |
| Parameter | Value |
|---|---|
| Endurance, main contacts (typ.) | 100 000 |
| Switching frequency, AC-3 (max.) | 15 1/h |
| Parameter | Value |
|---|---|
| Main-circuit terminal type | screw-type terminals |
| Main-circuit connector arrangement | front side |
| Conductor cross-section, finely stranded with ferrule | 2x (0.5 ... 1.5 mm²), 2x (0.75 ... 2.5 mm²) |
| Parameter | Value |
|---|---|
| Height | 97 mm |
| Width | 45 mm |
| Depth | 96 mm |
| Mounting position | any |
| Parameter | Value |
|---|---|
| Operating temperature | -20 ... +60 °C |
| Storage temperature | -50 ... +80 °C |
| Transport temperature | -50 ... +80 °C |
| Max. installation altitude | 2 000 m |
| Parameter | Value |
|---|---|
| Design Of The Product | for transformer protection |
The 45 mm wide, 97 mm tall, 96 mm deep footprint fits standard panel layouts. Screw-type terminals on the main circuit accept solid 2x (0.5–1.5 mm²) and 2x (0.75–2.5 mm²), or stranded 2x (1–2.5 mm²) and 2x (2.5–6 mm²).
Panel integration note: the 45 mm width matches standard 45 mm DIN-rail device spacing; side clearances are zero (0 mm backwards, 0 mm at the side), so you can pack them tight. Shock rated 25g / 11 ms.
This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
The closest peer is 3RV1011-0GA10, a SIRIUS circuit breaker also for transformer protection. Key difference: this 3RV1421-1CA15 carries 100 kA breaking at 400 V vs. the 3RV1011-0GA10's lower rating — suited for higher-fault installations.
Listed depth is 96 mm.
Solid conductors: 2x (0.5–1.5 mm²) and 2x (0.75–2.5 mm²).
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