The MA trip unit provides magnetic-only short-circuit protection (I), meaning it responds to fault currents but not overloads — the motor's own overload relay handles that. This is standard practice for motor branch circuits where the breaker is sized for the short-circuit rating and the starter provides thermal protection. The 35 mm connection pitch matches standard busbar systems.
Breaking capacity and selectivity headroom
The N breaking capacity code delivers 50 kA Icu at 380/415 V AC and 440 V AC, 36 kA at 500 V, and 35 kA at 525 V per IEC 60947-2. At 480 V AC under UL 60947-4-1 it holds 50 kA. Rated for isolation (EN/IEC 60947-2), pollution degree 3, overvoltage category III. Suitability for isolation means you can use it as a visible-break disconnect for the motor circuit — no separate isolator needed.
Integration notes for the panel
IP40 front face, IK07 impact resistance. Five accessory slots for auxiliary contacts, shunt trips, or under-voltage releases. Electrical durability: 20,000 cycles at 440 V at In/2, 10,000 at full In. Mechanical durability 20,000 cycles. That's typical for a motor-circuit breaker — not a switching device, but rated for occasional isolation and fault clearing.