The Schneider Electric A9KF21106BQ is a 1-pole miniature circuit breaker from the Acti9 K60 series, rated 6 A with a B-curve trip characteristic. It is designed for AC distribution networks at 50/60 Hz and carries a 10 kA breaking capacity (Icn) at 240 V AC, certified to EN/IEC 60898-1.
Height is 81 mm, depth 70 mm. Tunnel-type terminals accept 1 to 25 mm² rigid or 1 to 16 mm² flexible conductors; strip length is 14 mm, tightening torque 2 N.m. IP20 rated, suitable for dry indoor enclosures.
Limitation class 3 (energy let-through) means it restricts fault energy more tightly than class 1 or 2, reducing stress on downstream wiring and connected equipment.
Electrical and mechanical durability are both rated at 20,000 cycles.