Siemens SENTRON 5SY7125-6 miniature circuit breaker, 1-pole, B characteristic, 25 A at 35 °C, 400 V AC, 15 kA per EN 60898, 25 kA per IEC 60947-2, 18 mm width, IP20.
| Parameter | Value |
|---|---|
| Product designation | Miniature circuit breaker |
| Brand name | SENTRON |
| Number of poles | 1 |
| Application suitability | Mechanical engineering / industry |
| Parameter | Value |
|---|---|
| Tripping characteristic class | B |
| Rated value (EN 60898) | 15 kA |
| Energy limitation class | 3 |
| 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 is designed for AC circuits up to 400 V at 50/60 Hz, and carries a breaking capacity of 15 kA per EN 60898 and 25 kA per IEC 60947-2.
At 35 °C the continuous rating is 25 A; it derates to 22.68 A at 45 °C, 21.85 A at 50 °C, 21 A at 55 °C, and 20.1 A at 60 °C.
The manufacturer designates it per IEC 81346-2 as function F.
Submit an RFQ through this listing. The part is sourced to order via independent distribution; availability and current pricing are confirmed at quote time.
Both are 1-pole SENTRON MCBs with the same 18 mm width and DIN-rail mounting, so the mechanical fit is identical. The 5SY7125-6 is a 25 A B-curve; the 5SY4140-7 is a 40 A C-curve — the difference is in the rating and trip characteristic, not the footprint. Verify the load current and coordination study before swapping.
The depth is 76 mm, with an installation depth of 70 mm.
The part is designed and tested to EN 60898 and IEC 60947-2. It carries the manufacturer's SENTRON designation and is halogen-free and silicon-free. For specific RoHS/REACH/UL declarations, request the manufacturer's compliance documentation through an RFQ — the evidence does not list those certs directly.
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