The 25 A rating holds at 30 °C ambient; at 40 °C it derates to 23.68 A, and at 55 °C to 21.54 A. If your panel runs warm — common in a crowded enclosure — size the load downstream to the derated figure, not the label. The 4-pole design (4P) switches all phases plus neutral, so it's the right choice for a three-phase plus neutral circuit where you want coordinated overcurrent protection on every conductor. Mounting position is unrestricted — install it horizontally, vertically, or upside-down without derating. Sealable terminals (yes) let you lock the cover after commissioning to prevent tamper. That's fine for branch-circuit protection where the breaker operates infrequently; not a daily-switching disconnect.
Siemens 5SL4425-8 SENTRON MCB, 4P D-Curve 25 A 10 kA
MPN5SL4425-8
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Siemens SENTRON 5SL4425-8, 4-pole D-curve miniature circuit breaker, 25 A rated, 10 kA breaking capacity, 400 V AC.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Brand name | SENTRON |
| Application suitability | Residential buildings/infrastructure |
| Parameter | Value |
|---|---|
| Number of poles | 4 |
| Pole configuration | 4P |
| Rated voltage, AC (multi-phase) | 440 V |
| Parameter | Value |
|---|---|
| Tripping characteristic (trip curve) | D |
| Energy limitation class | 3 |
| Overvoltage category | III |
| Pollution degree | 2 |
| Degree of protection (IP) | IP20, with connected conductors |
| Parameter | Value |
|---|---|
| Width in modular units | 4 |
| Width | 72 mm |
| Height | 90 mm |
| Depth | 76 mm |
| Installation depth | 70 mm |
| Mounting position | any |
| Tightening torque, max. | 75 °C |
| Tightening torque, min. | -40 °C |
| Sealable | Yes |
| Parameter | Value |
|---|---|
| Halogen-free | Yes |
| Silicone-free | Yes |
| Parameter | Value |
|---|---|
| Power loss per pole, AC (hot state, at In) | 2.3 W |
Product details
Frequently asked questions
Where can I buy the 5SL4425-8 and get a price?
We source the 5SL4425-8 through independent distribution and quote it to order against an RFQ. Availability and current pricing are confirmed at quote time.
What is the 5SL4425-8's depth?
The depth is 76 mm, with an installation depth of 70 mm.
What compliance documentation does Siemens provide for the 5SL4425-8?
The 5SL4425-8 is rated per EN 60898 and IEC 60947-2 for breaking capacity, carries an IP20 protection class, and is halogen-free and silicon-free. It is designed for residential buildings and infrastructure applications.
MPN
5SL4425-8