Siemens SENTRON 5SY7263-8, 2-pole miniature circuit breaker, 63 A rated current, D tripping characteristic, 15 kA breaking capacity per EN 60898, 36 mm wide.
| 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 |
For UL 1077 recognition, the interrupting rating is 5 kA (cite:).
At 35 °C ambient this breaker carries the full 63 A. As the panel warms, the continuous rating drops: 57.14 A at 45 °C, 55.06 A at 50 °C, 52.92 A at 55 °C, and 50.65 A at 60 °C (cite:–). Humidity also matters — the surrounding air can be up to 95% RH at 55 °C, but that limit falls to 35% RH at 75 °C (cite:).
We source and quote the 5SY7263-8 to order against an RFQ. Availability and current pricing are confirmed at quote time.
15 kA per EN 60898 and IEC 60947-2, and 5 kA per UL 1077 and CSA C22.2 No.235.
The 5SY7263-8 uses the same 36 mm (2-MW) footprint and DIN-rail mounting as other 5SY7 series breakers, so physical fit is the same. The key difference is the current rating — 63 A D-curve here versus whatever rating the 5SY7210-7CC carries — so check your load and conductor sizing before swapping.
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