The Schneider Electric A9F04150 is an Acti9 iC60N miniature circuit breaker — 1 pole, 50 A rated current, C curve, thermal-magnetic trip. It carries dual certification to EN/IEC 60947-2 (industrial) and EN/IEC 60898-1 (domestic/commercial), so it qualifies for both distribution panels and machine control cubicles. The 18 mm width per pole means it snaps onto DIN rail at two 9 mm pitches, leaving the adjacent slots free for other breakers or accessories.
Breaking capacity varies by voltage and standard. Under EN/IEC 60947-2 the Icu is 36 kA at 12-60 VAC, 20 kA at 100-133 VAC, and 10 kA at 220-240 VAC. On the DC side it delivers 15 kA at 12-60 VDC and 10 kA at 60-72 VDC. Under EN/IEC 60898-1 the Icn is 6000 A at 230 VAC. That 36 kA figure at low AC voltages gives headroom for high-fault panels fed from large transformers — useful when coordinating downstream branch breakers.
Terminal and wiring
Double terminals top and bottom accept 1-35 mm² rigid or 1-25 mm² flexible. The IP20 finger-safe terminals suit enclosed panel mounting.
Rated for 10,000 electrical and 20,000 mechanical cycles. It is suitable for isolation per both standards — the contact position indicator shows open/closed status visibly on the toggle. The C curve magnetic trip fires at 8 x In ±20%, so it handles motor inrush up to around 400 A peak without nuisance tripping on moderate starts.