Siemens SENTRON 5SY4201-8, 2-pole miniature circuit breaker, D tripping characteristic, 400 V AC, 10 kA (EN 60898) / 35 kA (IEC 60947-2) breaking capacity, 2 modular width units.
| Parameter | Value |
|---|---|
| Product designation | Miniature circuit breaker |
| Brand name | SENTRON |
| Application environment | Mechanical engineering / industry |
| Parameter | Value |
|---|---|
| Number of poles | 2 |
| Parameter | Value |
|---|---|
| Tripping characteristic class | D |
| Overvoltage category | III |
| Parameter | Value |
|---|---|
| Modular width units | 2 |
| Width | 36 mm |
| Height | 90 mm |
| Depth | 76 mm |
| Installation depth | 70 mm |
| Mounting position | any |
| Min. | -40 °C |
| Max. | 75 °C |
| Protection degree (IP) | IP20, with connected conductors |
| Parameter | Value |
|---|---|
| Pollution degree | 3 |
| Parameter | Value |
|---|---|
| At AC rated value | 400 V |
| According to EN 60898 rated value | 10 kA |
| With single-phase operation at AC rated value | 440 V |
The 5SY4201-8: At DC, the interrupting capacity is 15 kA per IEC 60947-2 at 60 V, with a maximum operating voltage of 72 V DC — useful for DC distribution in telecom or UPS cabinets where the fault loop impedance is low.
Rated 400 V AC for single-phase or multi-phase operation, with a ceiling of 440 V AC in either configuration — the extra headroom matters when the supply voltage runs high at no-load or during light-load periods.
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