The Schneider Electric A9F68320 is an Acti9 iT60 miniature circuit breaker (MCB) rated at 20 A with a C-curve trip characteristic, 3-pole configuration, and a 54 mm width for DIN-rail mounting in distribution panels.
This MCB carries dual certification to EN/IEC 60898-1 and EN/IEC 60947-2, so it qualifies for both household-style distribution (Icn) and industrial circuit protection (Icu). The breaking capacity varies by voltage: 36 kA at 12–133 V AC, 20 kA at 220–240 V AC, 10 kA at 380–415 V AC, and 6 kA at 440 V AC per IEC 60947-2; at 400 V AC it also meets 6 kA Icn per IEC 60898-1. The limitation class is 3 per IEC 60898-1, meaning it limits let-through energy enough to protect downstream equipment in most fault scenarios — useful when coordinating with downstream sub-circuits.
Installation notes
Mounts on DIN rail, occupies 6 x 9 mm pitches (54 mm total). Terminals accept 1–25 mm² rigid or 1–16 mm² flexible copper; strip length 14 mm, tighten to 2 N·m. The removable comb busbar is pre-installed for daisy-chaining phases across multiple MCBs in the same panel row. Ambient operating range is -35 to 70 °C; storage from -40 to 85 °C at up to 95% RH.