The Schneider Electric C60H1P4AD is a 1-pole miniature circuit breaker from the Multi9 C60 series, rated 4 A at 40 °C with a D tripping curve. The D curve means its magnetic trip operates between 10 and 14 times the rated current (40 to 56 A instantaneous trip), making it the right choice for loads with high inrush — think motor starters, small transformers, or discharge lighting where a B or C curve would nuisance-trip on startup. The thermal-magnetic trip unit handles the overload side. Breaking capacity is 15 kA Icu at 230...240 V AC (IEC 60947-2), which covers most commercial and light industrial distribution panels. At 400...415 V AC the rating drops to 4 kA — still adequate for sub-distribution in a 400 V system where the upstream device limits fault current.
The 18 mm width (2 x 9 mm pitches) means it occupies a single module slot in a standard distribution board — no surprises for panel fill calculations. Depth is 73 mm, height 81 mm. Tunnel-type terminals accept up to 25 mm² rigid or 16 mm² flexible cable; strip length is 14 mm, tighten to 2 N·m.
Rated operational voltage (Ue): 440 V AC. Rated insulation voltage (Ui): 500 V AC. Impulse withstand (Uimp): 6 kV. Tropicalisation class 2 per IEC 60068-1, limitation class 3 per IEC 60947-2. Operating temperature range -25 to 60 °C, storage -40 to 70 °C. Mechanical durability: 20,000 cycles.