The A9N60754 is a Schneider Electric Acti9 C120N miniature circuit breaker — 3-pole, D-curve, rated 100 A at 40 °C. The D curve means magnetic tripping occurs at 10 to 14 times In (12 x In ±20 % here), so it tolerates the high inrush of motor, transformer, or welding loads without nuisance trips. Clip it onto a 35 mm symmetrical DIN rail — that's the standard top-hat rail in every panel. 81 mm wide (9 mm pitch × 9 modules), so it occupies nine 18 mm-wide ways in the enclosure. The IP20 finger-safe terminals mean it's enclosed for panel use, not outdoor or washdown.
Integration notes
Tunnel-type terminals accept 1 to 50 mm² rigid or 1.5 to 35 mm² flexible copper — that's a wide enough range for the 100 A feed. The handle is sealable in OFF or ON position (cable diameter 0.7 mm) for lockout/tagout. Earth-leakage protection requires a separate block — the MCB itself is thermal-magnetic only, no integral RCD.
Designed to EN/IEC 60947-2, limitation class 3 (energy let-through kept low for downstream device protection). Rated insulation voltage 500 V AC. Mechanical durability 20,000 cycles, electrical 5,000 cycles at rated load. The manufacturer provides the usual CE, UKCA, and RoHS declarations with the batch.