The Schneider Electric Acti9 K60 miniature circuit-breaker A9KF71410BQ is a 4-pole, C-curve 10 A MCB rated for 10 kA breaking capacity at 415 V AC per EN/IEC 60898-1. It is a current-production part.
C-curve means magnetic trip between 5 and 10 times rated current — 50 to 100 A for this 10 A breaker. Thermal-magnetic trip technology — the thermal bimetal handles overloads (slow, inverse-time), the solenoid handles short-circuits (instantaneous above the magnetic threshold). No electronics to fail, no auxiliary power needed. Simple, field-serviceable, and what every MRO guy wants on the van. Saves a separate isolator in many distribution boards.
Snap-on DIN rail mount, 72 mm wide (8 x 9 mm pitches). Occupies 4 pole spaces on the rail. Tunnel terminals accept 1 to 25 mm² rigid or 1 to 16 mm² flexible — enough for most 10 A branch circuits. Tightening torque 2 N.m top and bottom. Wire strip length 14 mm. IP20 finger-safe terminals. Set of 3 — so you get three identical 4P breakers in one order. That's handy for a three-phase panel where you need the same rating on multiple feeders.