The Schneider Electric A9N60733 is an Acti9 C120N miniature circuit breaker (MCB) rated 80 A at 40 °C with a C-curve trip characteristic (magnetic trip at 8 x In ±20 %). That 80 A continuous rating means it carries the full load current of a distribution subfeed or a large commercial load without nuisance tripping — sized for a 3-phase 80 A feeder where you need thermal-magnetic protection in a 2-pole (2P) package. The 10 kA breaking capacity (Icu at 230…400 V AC, per EN/IEC 60947-2) tells you it can safely interrupt a fault current up to 10,000 A at the panelboard, which covers most commercial and light industrial service entrances. The C-curve is the standard choice for general distribution loads — motors, lighting, small transformers — where inrush is moderate and you want coordination downstream of a larger upstream device.
The 2-pole footprint takes 6 x 9 mm pitches (54 mm wide), so it occupies two module spaces on the rail. Tunnel-type terminals accept 1…50 mm² rigid or 1.5…35 mm² flexible cable; strip 15 mm and torque to 3.5 N·m. IP20 finger-safe terminals are fine for enclosed panels; keep the front cover on in service.
Limitation class 3 (energy-limiting) per that standard means it restricts let-through energy in a fault, which helps with downstream device coordination. The manufacturer provides the usual compliance documentation (declaration of conformity, CE marking) for the Acti9 range; specific RoHS/REACH declarations are available on request through the supply channel.