The MGN60637 is a 3-pole C60H miniature circuit-breaker from the Multi9 range, rated 4 A at 50 °C with a C-curve (8.5 x In magnetic trip).
The C-curve (8.5 x In ±20%) means the breaker trips magnetically between 27.2 A and 40.8 A — suited for resistive and general-purpose loads where short inrush is expected. The 4 A thermal element protects downstream wiring up to that continuous current at 50 °C ambient. At 415 V AC it still breaks 15 kA Icu. The 3-pole version protects all three phases in a three-phase distribution circuit. Rated operational voltage is 440 V AC, so it covers standard 400/415 V three-phase networks.
Snaps onto 35 mm symmetrical DIN rail. Occupies 6 x 9 mm pitches (54 mm wide). Strip length 14 mm. IP20 finger-safe front. Toggle control with ON/OFF indication and a contact position indicator for visual confirmation of isolation status — useful during panel lockout/tagout. Compatible with comb busbars and distribution blocks on top or bottom. Earth-leakage protection requires a separate Vigi block — not integrated.