The MGN60908 is a 4-pole C60N miniature circuit-breaker from the Multi9 range, rated 20 A at 50 °C with a C trip curve. It breaks up to 20 kA Icu at 240 V AC phase-to-phase and 10 kA Icu at 415 V AC, per EN/IEC 60947-2 — the standard that governs industrial MCB performance, not just residential. The thermal-magnetic trip unit handles overloads and short-circuits; the magnetic pickup fires at 8.5 x In ±20 %, which for a 20 A breaker means instant trip between roughly 136 A and 204 A. That spread matters when coordinating downstream branch circuits — you need the upstream breaker to clear before the feeder trips.
Rated for distribution panels
Snaps onto 35 mm symmetrical DIN rail — standard for panel builds. At 72 mm wide (8 x 9 mm pitches), it occupies four module spaces. The tunnel-type terminals and 14 mm strip length are straightforward for panel wiremen.