Siemens SENTRON 5SL3140-7MB miniature circuit breaker, 1-pole, C-curve, 40 A, 4.5 kA breaking capacity at 230/400 V AC, 1 MW unit width.
| Parameter | Value |
|---|---|
| Product designation | Miniature circuit breaker |
| Brand name | SENTRON |
| Number of poles | 1 |
| Pole design | 1P |
| Application suitability | Residential buildings/infrastructure |
| Parameter | Value |
|---|---|
| Tripping characteristic class | C |
| Energy limitation class | 3 |
| Overvoltage category | III |
| Parameter | Value |
|---|---|
| Mounting position | any |
| Width | 18 mm |
| Height | 90 mm |
| Depth | 76 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 |
| Pollution degree | 2 |
| Halogen-free | Yes |
| Silicone-free | Yes |
The Siemens SENTRON 5SL3140-7MB is a 1-pole miniature circuit breaker with C-curve tripping characteristic, rated 40 A at 230/400 V AC.
That 18 mm width means it fits one-to-one in a panel originally laid out for any other 1-MW MCB — no re-spacing needed.
Pricing and availability are confirmed at quote time. Submit an RFQ through this page, and we'll return a current-market quote from our independent distribution network.
The 5SL3140-7MB has a depth of 76 mm, a width of 18 mm (1 MW), and a height of 90 mm. It fits standard DIN-rail enclosures with at least 76 mm of clear depth behind the panel door.
Yes, the 5SL3140-7MB shares the same 1-pole, 18 mm wide DIN-rail footprint as the 5SL3116-6MB. The difference is the C-curve vs B-curve and the higher 40 A rating — no rewiring needed for the same physical slot.
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