Siemens SENTRON 5SJ4 series, miniature circuit breaker, 1-pole, D characteristic, 3 A rated, 70 mm depth, 18 mm width, IP20/IP40.
| 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 |
| 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 |
Rated current holds at 3 A up to 40 °C ambient; above that it derates linearly to 2.6 A at 60 °C.
This MCB is suited for mechanical engineering and industrial panel applications — motor branch circuits, small transformer primaries, and lighting contactor coils where the D-curve prevents nuisance tripping on inrush. The 60 V DC maximum rating also covers control-circuit protection in 24 VDC or 48 VDC loops.
1 pole, D tripping characteristic, rated 3 A at AC (derated at elevated temperatures), maximum DC voltage 60 V. Dimensions: 18 mm wide, 70 mm deep, 121 mm tall. Ambient temperature range -40 to 75 °C. IP20 with connected conductors, IP40 in the handle area.
Both are 1-pole MCBs on a standard DIN rail, but the 5SJ4103-8HG42 is a D-curve 3 A device, while the 5SL4363-7 is a different characteristic and rating. The mechanical footprint (1 MW, 18 mm wide) is the same, so it fits the same rail space, but the trip curve and current rating must match the circuit design — verify coordination before substitution.
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