Acti9 iC60H at a glance
It is a 1P+N unit — one protected pole plus a switched neutral — and carries a 42 kA breaking capacity (Icu) at 12-60 V AC, which drops to 15 kA at 220-240 V AC per EN/IEC 60947-2. The thermal-magnetic trip unit gives you two layers of protection: a thermal bimetal for sustained overloads (heating up over time) and a magnetic coil for instantaneous short-circuit trips. The B-curve magnetic trip threshold is 4 x In ±20 %, so for a 50 A breaker the magnetic pickup sits between roughly 160 A and 240 A — fast enough to clear a hard short but tolerant of mild inrush from resistive loads. This makes it a distribution-grade MCB (Category A per EN/IEC 60947-2), not a motor-protection device. It is dual-rated to both EN/IEC 60898-1 (household-style MCB standard) and EN/IEC 60947-2 (industrial circuit-breaker standard), so it can be specified in residential consumer units or industrial panelboards. The 10,000 A Icn at 230 V AC under the 60898-1 standard is the domestic rating; the higher 60947-2 Icu figures apply when it is installed in an industrial enclosure with proper coordination. You get isolation capability certified under both standards, which means it can be used as a disconnecting means for downstream circuits.
Snaps onto a standard 35 mm DIN rail — 4 module pitches wide (36 mm per pole, so 4 x 9 mm = 36 mm total width). Height is 91 mm, depth 78.5 mm. Terminals accept double conductors: 1-35 mm² rigid or 1-25 mm² flexible, with a stripping length of 14 mm and a tightening torque of 3.5 N.m. The toggle control has a trip indicator window that shows green/red for contact position, so you can visually confirm the state without removing the cover.