The Schneider Electric A9N60782 is an Acti9 C120H miniature circuit breaker rated 100 A at 40 °C with a C curve (magnetic trip at 8 x In ±20 %). The 2-pole configuration protects both phase conductors in a single-phase or split-phase circuit. The thermal-magnetic trip unit combines a bimetal element for overload protection (time-delayed, inversely proportional to current) with a solenoid for short-circuit protection (instantaneous above 800 A for this 100 A unit). The C curve is the standard choice for general distribution loads — lighting, small motors, resistive heaters — where inrush currents are moderate. For highly inductive loads like large transformers or motor starters, a D curve would be more appropriate; for purely resistive loads, a B curve offers tighter protection.
Occupies 6 x 9 mm pitches (54 mm width) in the enclosure. Tunnel-type terminals accept 1-50 mm² rigid or 1.5-35 mm² flexible conductors; tighten to 3.5 N·m. Strip 15 mm of insulation.