Siemens SENTRON 5SY5125-7CC11 miniature circuit breaker, 1-pole, C-curve, 25 A, 10 kA DC at 220 V DC, for railway applications, 18 mm width.
| Parameter | Value |
|---|---|
| Product designation | Miniature circuit breaker |
| Brand name | SENTRON |
| Number of poles | 1 |
| Pole design | 1P |
| Application suitability | Railway |
| Parameter | Value |
|---|---|
| Tripping characteristic class | C |
| Overvoltage category | III |
| Parameter | Value |
|---|---|
| Mounting position | any |
| Fastening method | Quick assembly system |
| Combined terminal, top | Yes |
| Combined terminal, bottom | Yes |
| Width | 18 mm |
| Height | 90 mm |
| Depth | 76 mm |
| Installation depth | 70 mm |
| Modular width units | 1 |
| Torque, min. | -40 °C |
| Torque, max. | 75 °C |
| Sealable | Yes |
| Parameter | Value |
|---|---|
| IP protection class | IP20, with connected conductors |
| Pollution degree | 3 |
| Halogen-free | Yes |
| Silicone-free | Yes |
It carries a C-tripping characteristic at 25 A and is rated to interrupt DC faults up to 10 kA at 220 V DC per IEC 60947-2.
This unit is built for DC switching — the arc extinction is designed for a continuous DC voltage, and the polarity of the supply must be observed. The maximum DC operating voltage is 250 V, so the 220 V DC rating sits within a safe margin.
The 5SY5125-7CC11 has a width of 18 mm, occupying a single modular unit on a DIN rail.
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