The 5SJ4150-8HG40: D-curve means the breaker trips at 10–20× In (500–1000 A instantaneous), designed for high-inrush loads like motors, transformers, and welding equipment. The 50 A rating holds at 30 and 40 °C ambient; derate to 47.6 A at 50 °C and 45 A at 60 °C. Single-pole construction limits it to single-phase or DC branch circuits. The 18 mm width (1 modular unit) fits standard DIN-rail panels.
Siemens SENTRON 5SJ4150-8HG40 MCB, 1-pole D-curve 50 A
MPN5SJ4150-8HG40
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Siemens SENTRON 5SJ4150-8HG40, miniature circuit breaker, 1-pole, D-curve, 50 A rated, AC/DC, 60 V DC max.
$148.73Ref. 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 | 90 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
Does the 5SJ4150-8HG40 fit on a standard DIN rail?
Yes, it mounts on a standard mounting rail (DIN rail) and occupies 1 modular unit (18 mm width). Mounting position is any.
MPN
5SJ4150-8HG40