The Schneider Electric A9KF21116BQ is a 1-pole Acti9 K60 miniature circuit-breaker rated 16 A with a B-curve trip characteristic and 10 kA breaking capacity at 240 V AC, compliant with EN/IEC 60898-1.
The thermal-magnetic trip unit combines a bimetal for overload protection and a solenoid for short-circuit response. Rated 16 A continuous, the breaker protects downstream wiring sized for that ampacity. The 20,000 electrical and 20,000 mechanical cycles indicate a service life typical for distribution panels — not a high-cycling motor-switching duty, but adequate for branch-circuit protection where the breaker operates infrequently.
Snap-on DIN rail mounting (EN/IEC 60715) with tunnel terminals accepting 1–25 mm² rigid or 1–16 mm² flexible conductors. Tightening torque 2 N·m top or bottom; strip length 14 mm. IP20 finger-safe terminals suit enclosed panel installation — not for wet or washdown environments. The white housing and toggle control are standard for the Acti9 K60 series.