Rated 40 A at 240 V AC, 50 Hz, with a B-curve tripping characteristic that trips between 3 and 5 times rated current, making it suited for resistive and general-purpose loads where inrush is modest. The 55 mm installation depth and 2 width units (standard 18 mm per pole) let it drop into a standard DIN-rail enclosure without crowding adjacent devices.
SENTRON 5SQ2560-0KA40 MCB, 2-pole 1P+N, B-curve 40 A, 3 kA
MPN5SQ2560-0KA40
SENTRON, 5SQ series, miniature circuit breaker (MCB), 2-pole 1P+N, B-curve, 40 A, 3 kA breaking capacity, 240 V AC, 50 Hz, IP20, 55 mm installation depth.
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Independent China distributor & sourcing agent· Listing updated Sep 2026
Specifications
| Parameter | Value |
|---|---|
| Brand name | SENTRON |
| Number of poles | 2 |
| Parameter | Value |
|---|---|
| Tripping characteristic class | B |
| 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 |
| Acc. to IEC 60947-2 / rated value | 3 kA |
| Supply voltage (at AC) | 240 V |
| Supply voltage frequency | 50 Hz |
| Product function (neutral conductor switching) | Yes |
Product details
Frequently asked questions
What does the 1P+N pole configuration mean?
The breaker switches both the phase and neutral conductors, but only the phase pole is protected against overcurrent. The neutral pole is switched only — it opens and closes with the phase but has no trip element.
MPN
5SQ2560-0KA40