The MGN60888 is a 3-pole C60N miniature circuit-breaker from the Multi9 range, rated 1 A at 50 °C per EN/IEC 60947-2. The 20 kA Icu at 240 V AC phase-to-phase gives headroom for high-fault panels; at 415 V AC the breaking capacity is 10 kA Icu, and at 440 V AC it drops to 6 kA Icu — so the voltage class of your supply determines the available fault-clearing capability. This is a Category A breaker (no intentional short-time delay), so it's suited for branch-circuit protection where selectivity with upstream devices relies on current-limiting performance rather than time grading. The thermal-magnetic trip unit provides overload protection via the bimetal element and short-circuit protection via the solenoid — no electronic adjustment, so set it and forget it.
The 3-pole body occupies 6 x 9 mm pitches (54 mm wide), 81 mm tall, 73 mm deep — standard footprint for a Multi9 C60N. IP20 finger-safe terminals suit enclosed panel use.