What this 4-pole C-curve MCB is for
Four modular width units (18 mm each) mean it occupies 72 mm of rail — standard for a 4-pole MCB in this class. The IP20 enclosure with connected conductors is typical for enclosed panel mounting; not for wet or outdoor locations without a secondary enclosure.
Two breaking-capacity ratings let you match the standard that governs your panel design. Under EN 60898 (household / similar installations) it is rated 15 kA; under IEC 60947-2 (industrial switchgear) it is rated 20 kA. At 20 kA it clears faults without cascading to upstream devices, preserving selectivity in a multi-level distribution scheme. Power loss is 1.1 W per pole in hot operating state — low enough that thermal buildup in a densely populated enclosure is manageable.
Snap-on DIN rail mounting, any position.
