The current rating is temperature-dependent: 63 A at 35 °C, derating to 59.47 A at 40 °C, 57.64 A at 45 °C, 55.76 A at 50 °C, 53.74 A at 55 °C, and 51.72 A at 60 °C. If your panel ambient runs at 50 °C, the breaker's continuous current limit is 55.76 A, not the 63 A on the label. That derating curve is the number to check against your load current, not the 35 °C figure.
Siemens 5SY5263-7CC11 SENTRON MCB, 2P, C-63 A DC, 10 kA
MPN5SY5263-7CC11
Siemens SENTRON 5SY5263-7CC11, 2-pole miniature circuit breaker, C characteristic, 63 A at 35 °C DC, 10 kA interrupting capacity per IEC 60947-2, for railway applications.
Source DocumentedChannel stated on listing & quote
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Independent China distributor & sourcing agent· Listing updated Sep 2026
Specifications
| Parameter | Value |
|---|---|
| Product designation | Miniature circuit breaker |
| Brand name | SENTRON |
| Application environment | Railway |
| Parameter | Value |
|---|---|
| Number of poles | 2 |
| Parameter | Value |
|---|---|
| Tripping characteristic class | C |
| 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 |
Product details
Frequently asked questions
Where can I buy 5SY5263-7CC11?
This part is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.
MPN
5SY5263-7CC11