Rated for 20 to 690 V AC, it carries a gL/gG fuse backup rating of 63 A across the 400 V, 500 V, and 690 V levels, so the fuse coordination is consistent regardless of the line voltage within that range. The interrupting capacity hits 100 kA at 240 V AC, dropping to 25 kA at 400 V and 2 kA at 690 V — the SCCR headroom at the lower voltages is substantial for a 45 mm wide frame.
Clearance requirements: 50 mm upwards and downwards, 30 mm at the sides, zero forwards and backwards. That zero forwards clearance is notable — the breaker can be mounted flush against a panel door or rear wall without derating.
Ratings in context
The breaker is rated for starter combination duty, which means it's intended to be paired with a contactor for motor starting and overload protection. The AC-3 and AC-3e maximum switching rate is 15 operations per hour — this is not a high-cycling device; it's sized for occasional motor starts, not frequent jogging or inching. Horsepower ratings span from 2 hp at 110/120 V up to 20 hp at 460/480 V, covering common North American motor sizes. The main circuit uses screw-type terminals accepting 2x 1 to 2.5 mm² solid/stranded or 2x 2.5 to 10 mm², with M4 thread on the main contacts.