Siemens SENTRON 5SJ4 series miniature circuit breaker, 5SJ4102-8HG40, 1-pole, 2 A rated, D tripping characteristic, 10 kA breaking capacity per EN 60898, for DIN-rail mounting.
| 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 |
For DC applications, the maximum rated voltage is 60 V — so it works in a 48 VDC control bus but not a 110 VDC battery bank.
Depth is 70 mm, installation depth also 70 mm — check the gland plate clearance if your enclosure is shallow.
At 30 °C and 40 °C ambient, the breaker holds its full 2 A rating. At 45 °C and 50 °C it derates to 1.9 A; at 55 °C and 60 °C it drops to 1.8 A.
The D-curve trips magnetically at 10–14 times the rated current (20–28 A for this 2 A breaker). It is meant for loads with high inrush like small motors, transformers, or solenoid valves — not for general lighting or resistive heaters where a B or C curve would be more appropriate.
Rated breaking capacity is 10 kA per EN 60898, the standard for miniature circuit breakers in household and similar installations. This means it can safely interrupt a short-circuit fault up to 10 kA without welding contacts or causing arc flash.
Yes, but only up to 60 V DC maximum rated voltage. Suitable for a 48 VDC control bus, but not for 110 VDC battery banks or higher-voltage DC systems.
The 5SL6006-7 is a different series (SENTRON 5SL) with a different tripping characteristic and rating. The 5SJ4102-8HG40 is a 2 A D-curve 1-pole MCB; the 5SL6006-7 is a 6 A B-curve 1-pole MCB. They are not drop-in replacements — verify the load current, curve, and breaking capacity before substituting.
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