The D-curve means the magnetic trip coil engages at 10 to 20 times the rated current — typical for motor circuits where starting current can hit 8–12× FLA. At 400 V AC (the rated operational voltage), the breaker safely interrupts a 10 kA fault under EN 60898 rules, or 15 kA under IEC 60947-2, which governs industrial rather than household installations. Insulation voltage (Ui) is 440 V AC, so it suits 400 V line-to-line systems with margin. The DC rating of 60 V means it can also protect a 48 V DC control bus, but the 3-pole design does not switch the neutral — that's a separate pole if needed.
Siemens 5SJ4301-8HG41 SENTRON MCB, 3P, D-curve, 10kA
MPN5SJ4301-8HG41
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Siemens SENTRON 5SJ4 miniature circuit breaker, 3-pole, D-characteristic, 10 kA (EN 60898) / 15 kA (IEC 60947-2), 400 V AC, 3 MW units, sealable, halogen-free.
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026
Specifications
| Parameter | Value |
|---|---|
| Brand name | SENTRON |
| Number of poles | 3 |
| Pole configuration | 3P |
| Suitability for operation | Mechanical engineering / industry |
| Parameter | Value |
|---|---|
| Tripping characteristic (curve) | D |
| Breaking capacity per EN 60898 | 10 kA |
| Breaking capacity per IEC 60947-2 | 15 kA |
| Overvoltage category | 3 |
| IP protection class | IP20, with connected conductors, IP 40 in the handle range |
| Pollution degree | 3 |
| Parameter | Value |
|---|---|
| Supply frequency range | 50/60 Hz |
| Power loss per pole at rated current (AC, hot) | 1.5 W |
| Mechanical service life (operating cycles, typ.) | 10 000 |
| Neutral conductor switching | No |
| Parameter | Value |
|---|---|
| Modular width units | 3 |
| Mounting position | any |
| Width | 54 mm |
| Height | 110 mm |
| Depth | 70 mm |
| Installation depth | 70 mm |
| Terminal tightening torque, max. | 75 °C |
| Terminal tightening torque, min. | -40 °C |
| Combined terminal, top | Yes |
| Combined terminal, bottom | Yes |
| Fastening method | on standard mounting rail |
| Sealable | Yes |
| Accepts supplementary devices | Yes |
| Parameter | Value |
|---|---|
| Halogen-free | Yes |
| Silicone-free | Yes |
| Vibration resistance (IEC 60068-2-6) | ±1 mm at 5 to 25 Hz; 50 m/s² at 25 to 150 Hz |
Product details
MPN
5SJ4301-8HG41