Siemens SENTRON 5SL6 series, miniature circuit breaker (MCB), 1-pole, B characteristic, 20 A rated current, 6 kA breaking capacity per EN 60898, 400 V AC, 18 mm width.
| Parameter | Value |
|---|---|
| Product designation | Miniature circuit breaker |
| Brand name | SENTRON |
| Number of poles | 1 |
| Application suitability | Residential buildings/infrastructure |
| Parameter | Value |
|---|---|
| Tripping characteristic class | B |
| Rated value (EN 60898) | 6 kA |
| Overvoltage category | 3 |
| Parameter | Value |
|---|---|
| Mounting position | any |
| Width | 18 mm |
| Height | 90 mm |
| Depth | 76 mm |
| Installation depth | 70 mm |
| Sealable | Yes |
| Parameter | Value |
|---|---|
| IP protection class | IP20, with connected conductors |
| Halogen-free | Yes |
| Silicone-free | Yes |
The Siemens 5SL6120-6MB is a SENTRON 5SL6 miniature circuit breaker — one pole, B-curve, rated 20 A at 400 V AC, with a 6 kA breaking capacity certified to EN 60898.
The 70 mm installation depth plus 76 mm overall depth leaves clearance for wiring behind the panel door. Any mounting position is allowed, so orientation in a crowded enclosure is flexible. Terminals accept solid or stranded conductors from 0.75 to 25 mm²; tighten to 2.5–3 N·m.
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The overall depth is 76 mm; the installation depth (behind the panel face) is 70 mm. That 6 mm difference accounts for the front bezel and toggle clearance.
The screw terminals accept solid conductors from 0.75 mm² up to 25 mm². Stranded conductors are also accepted over the same range.
Both are 1-pole MCBs with the same 18 mm width and DIN-rail mount, so the mechanical fit is identical. However, the 5SL4120-7CC carries a C-curve and a 10 kA breaking capacity — verify that the B-curve and 6 kA rating of the 5SL6120-6MB meet your coordination study and fault-current requirements before swapping.
The part is certified to EN 60898 (6 kA breaking capacity) and carries the SENTRON brand. It is halogen-free and silicon-free. For specific RoHS, REACH, or UL documentation, request the manufacturer's declaration with your RFQ.
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