Under UL 1077 it carries a 5 kA interrupting rating — the part is dual-rated for IEC and North American supplementary protection applications. This is a magnetic-only trip unit — no thermal bimetal. That makes it suitable for circuits where the overload protection is handled elsewhere (a motor starter or feeder breaker), and the MCB is there purely for short-circuit isolation. The 3-pole (3P) configuration with no neutral switching means it interrupts all three phases but leaves the neutral continuous — standard for three-phase motor branch circuits in European panel practice.
Occupies 3 width units at 54 mm wide. The sealable feature allows a lead seal or wire tag through the terminal cover to prevent tampering after commissioning.