The 5SJ4130-8HG42: The 30 A rating holds at 30 °C and 40 °C ambient; it derates to 29.1 A at 45 °C, 28.2 A at 50 °C, 27.2 A at 55 °C, and 26.4 A at 60 °C. That derating curve matters if the breaker lives in a warm cabinet — you need headroom above the continuous load. The DC rating tops out at 60 V, so it works for 48 VDC control circuits but not for a 125 VDC battery bank.
Siemens 5SJ4130-8HG42 SENTRON MCB, 1P D-curve 30 A
MPN5SJ4130-8HG42
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Siemens SENTRON 5SJ4 miniature circuit breaker, 1-pole D-curve, 30 A rated AC/DC, 18 mm wide, DIN-rail mount.
$98.98Ref. 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 | 121 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 dimensions of the 5SJ4130-8HG42?
Width 18 mm (1 modular unit), depth 70 mm, height 121 mm.
MPN
5SJ4130-8HG42