SENTRON 5SQ2370-0KA03, 3-pole miniature circuit breaker, C tripping characteristic, 3 A rated current, 3 kA breaking capacity at 400 V AC, 50 Hz, IP20.
| Parameter | Value |
|---|---|
| Overvoltage category | 3 |
| Parameter | Value |
|---|---|
| Poles | 3 |
| Type of voltage | AC/DC |
| Installation depth | 55 mm |
| Protection class IP | IP20 |
| Energy limiting class | 3 |
| Number of width units | 3 |
| Number of poles (Note) | 3P |
| Circuit-breaker (Design) | 5SQ |
| Current (at AC) | 3 A |
| Tripping characteristic class | C |
| Acc. to EN 60898 / rated value | 3 kA |
| Acc. to IEC 60947-2 / rated value | 3 kA |
| Supply voltage (at AC) | 400 V |
| Supply voltage frequency | 50 Hz |
| Product function (neutral conductor switching) | No |
The SENTRON 5SQ2370-0KA03 is a 3-pole miniature circuit breaker rated 3 A with a C tripping characteristic, designed for 400 V AC, 50 Hz systems.
IP20 finger-safe terminals suit dry indoor panels; no washdown rating. Neutral conductor not switched through the breaker — plan for a separate neutral bar or a 4-pole variant if isolation on all poles is required.
It is rated 3 kA at 400 V AC per both EN 60898 and IEC 60947-2, so it safely interrupts fault currents up to that level without cascading upstream.
Yes, the 5SQ2370-2YA04 shares the same 3-pole form factor, 55 mm depth, and 3 kA breaking capacity — the only difference is its 4 A rating versus the 3 A on this part. Panel wiring and DIN-rail footprint are identical.
Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit a request for a firm offer.
C-curve, which trips magnetically at 5× to 10× rated current. That means the 3 A unit holds through brief inrush from small motors or transformers but clears fast on a hard short.
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