D-curve trip for motor and transformer loads
The 5SJ4220-8HG42: This 2-pole MCB carries a D tripping characteristic — magnetic trip between 10× and 20× In — so it handles the inrush from small motors, transformers, and solenoid banks without nuisance tripping. Rated 10 kA breaking capacity per EN 60898 and 15 kA per IEC 60947-2 at 400 V AC, it clears a fault before the upstream device has to act.
DIN-rail fit and panel space
Width is 36 mm (2 modular units), depth 70 mm, height 121 mm. Snaps onto standard mounting rail in any position — no orientation restrictions. Installation depth matches the 70 mm depth, so it sits flush in a standard 80 mm deep enclosure with room for wiring behind.
Environmental and compliance specs
Halogen-free and silicon-free construction — important for sensitive contact environments and low-smoke applications. IP20 with connected conductors, IP40 in the handle range. Pollution degree 3, overvoltage category 3, ambient temperature range -40 °C to 75 °C, and 95% humidity tolerance. Sealable for lockout/tagout.