SENTRON 5SQ2570-0KA40, 2-pole 1P+N miniature circuit breaker, 40 A, C characteristic, 3 kA per EN 60898, 240 V AC, IP20, 2 width units.
| Parameter | Value |
|---|---|
| Brand name | SENTRON |
| Number of poles | 2 |
| Parameter | Value |
|---|---|
| Tripping characteristic class | C |
| Rated value (EN 60898) | 3 kA |
| Overvoltage category | 3 |
| Parameter | Value |
|---|---|
| Installation depth | 55 mm |
| Parameter | Value |
|---|---|
| IP protection class | IP20 |
| Parameter | Value |
|---|---|
| Type of voltage | AC/DC |
| Energy limiting class | 3 |
| Number of width units | 2 |
| Number of poles (Note) | 1P+N |
| Circuit-breaker (Design) | 5SQ |
| Current (at AC) | 40 A |
| Supply voltage (at AC) | 240 V |
| Supply voltage frequency | 50 Hz |
| Product function (neutral conductor switching) | Yes |
The C-curve means it tolerates moderate inrush (5–10× rated current) before tripping, making it a standard choice for general-purpose lighting and socket-outlet circuits in commercial and residential final distribution boards.
Occupies 2 width units on a standard DIN rail. Installation depth is 55 mm. IP20 finger-safe enclosure. Neutral conductor switching is built in.
Both are 2-pole SENTRON 5SQ breakers on the same 55 mm depth and 2 width-unit DIN-rail footprint. The 5SQ2570-2YA50 is a 2P (two protected poles) unit rated 50 A at 400 V; the 5SQ2570-0KA40 is 1P+N (one protected pole plus switched neutral) rated 40 A at 240 V. Mechanical fit is identical, but the pole count and voltage/current ratings differ — verify the circuit design before swapping.
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