SENTRON 5SQ2370-2YA08 — 3-pole C-curve MCB, 8 A, 400 V AC
Its 3 kA breaking capacity is certified per EN 60898, the standard for overcurrent protection in residential and commercial final circuits. The C-curve (5–10× In) makes it suitable for moderate inrush loads such as small motors, lighting banks, and transformer-fed circuits — not for purely resistive loads where a B-curve would suffice, nor for high-inrush industrial drives that need a D-curve.
Drop-in fit vs. sibling ratings
The 5SQ2370-2YA08 shares the same physical footprint (3-pole, 55 mm depth, 3 width units) and breaking capacity (3 kA at 400 V AC) as the 5SQ2370-2YA04 (4 A) and 5SQ2370-2YA01 (1 A). The only difference is the rated current. If a panel was specified around a 4 A or 1 A sibling, the 8 A unit drops into the same DIN-rail slot without rewiring — but verify the downstream conductor sizing and load protection coordination, since the higher rating may exceed the cable's ampacity or the device's withstand.
No neutral conductor switching — this is a line-side only device.