The C-curve (tripping characteristic class C) means the magnetic trip fires at 5 to 10 times rated current — 15 to 30 A for this 3 A unit. Thermal derating is published across the ambient range: 3 A at 30 °C, 2.85 A at 40 °C, down to 2.55 A at 60 °C. For a panel running at 50 °C ambient, figure 2.7 A continuous load maximum per pole. Overvoltage category III means it's rated for fixed-installation level — downstream of the utility meter, not for equipment-level protection.
SENTRON 5SQ2370-2YA03 Miniature Circuit Breaker, 3P C 3A 400
MPN5SQ2370-2YA03
SENTRON 5SQ2370-2YA03, miniature circuit breaker, 3-pole, C characteristic, 3 A, 400 V AC, 3 kA per EN 60898, IP20, 3 modular width units.
Source DocumentedChannel stated on listing & quote
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Independent China distributor & sourcing agent· Listing updated Sep 2026
Specifications
| Parameter | Value |
|---|---|
| Overvoltage category | 3 |
Product details
Frequently asked questions
What is the breaking capacity of 5SQ2370-2YA03?
3 kA per EN 60898 at 400 V AC. That is the standard domestic/commercial rating for this class of MCB.
What is the C-curve trip range on this breaker?
The C characteristic trips magnetically at 5 to 10 times the rated current — for the 3 A unit, that is 15 to 30 A.
Where can I buy 5SQ2370-2YA03?
Sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing confirmed at quote time.
Will 5SQ2370-2YA03 drop into a panel specified for 5SQ2370-2YA05?
Yes — same 3-pole footprint, 3 MW width, 55 mm depth, same terminal layout. The only difference is the current rating: 3 A versus 0.5 A on the -2YA05. No rewiring needed if the load is within the 3 A rating.
MPN
5SQ2370-2YA03