Rated 8 A at both 30 °C and 40 °C ambient; derate to 7.8 A at 45 °C, 7.6 A at 50 °C, 7.4 A at 55 °C, and 7.2 A at 60 °C. If your panel runs warm, factor in the thermal curve — at 50 °C you lose 0.4 A of headroom. Rated for AC/DC operation with a maximum DC voltage of 60 V. That covers 48 VDC control circuits common in industrial panels, but not 125 VDC or higher battery banks. IP20 with connected conductors, IP40 in the handle area. That's fine inside a closed panel; if the breaker is exposed to washdown or dust, it needs an additional enclosure. Vibration resistance tested to 50 m/s² at 25–150 Hz and 60 m/s² at 35 Hz — suitable for machine-mounted applications like conveyors or pumps.
Siemens SENTRON 5SJ4108-8HG41 MCB, 1P, D-curve, 8 A, 60 VDC
MPN5SJ4108-8HG41
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Siemens SENTRON 5SJ4 series, miniature circuit breaker, 1-pole, D tripping characteristic, 8 A rated, 60 VDC max, IP20/IP40.
$36.88 – $87.97Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026
Specifications
| Parameter | Value |
|---|---|
| Product designation | Miniature circuit breakers |
| Brand name | SENTRON |
| Number of poles | 1 |
| Application suitability | Mechanical engineering / industry |
| Parameter | Value |
|---|---|
| Tripping characteristic class | D |
| Rated value (EN 60898) | 10 kA |
| Overvoltage category | 3 |
| Parameter | Value |
|---|---|
| Mounting position | any |
| Fastening method | on standard mounting rail |
| Combined terminal, top | Yes |
| Combined terminal, bottom | Yes |
| Width | 18 mm |
| Height | 110 mm |
| Depth | 70 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, IP 40 in the handle range |
| Pollution degree | 3 |
| Halogen-free | Yes |
| Silicone-free | Yes |
Product details
Frequently asked questions
What are the key ratings of this MCB?
1-pole, D tripping characteristic, rated 8 A at AC/DC, maximum DC voltage 60 V. It mounts on a standard DIN rail and occupies 18 mm width (1 MW).
What compliance documentation is available for this part?
The part is halogen-free and silicon-free, and it is designed to IEC standards (acc. to IEC 81346-2 and DIN EN 61346-2). It carries IP20/IP40 protection and is rated for overvoltage category III and pollution degree 3.
MPN
5SJ4108-8HG41