Siemens SENTRON 5SJ4 miniature circuit breaker, 1-pole, D characteristic, 10 kA per EN 60898, 15 kA per IEC 60947-2, 18 mm width, 70 mm depth.
| Parameter | Value |
|---|---|
| Product designation | Miniature circuit breakers |
| Brand name | SENTRON |
| Number of poles | 1 |
| Pole design | 1P |
| Application suitability | Mechanical engineering / industry |
| Parameter | Value |
|---|---|
| Tripping characteristic class | D |
| 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 |
The D-curve means the magnetic trip threshold is 10 to 20 times In — sized for high-inrush loads such as motor starters, small transformers, or solenoid banks where a B- or C-curve would nuisance-trip on start-up. Verify that the load's inrush duration stays under 100 ms to avoid a trip before the contactor seals in.
The 121 mm height clears most enclosure backplates with room for wiring gutters.
Insulation voltage Ui is 440 V AC.
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