The Schneider Electric A9S60391 is a 3-pole switch disconnector from the Acti9 iSW series, rated for 100 A at 415 V AC 50/60 Hz. It is designed for isolation and control duties, certified to IEC 60947-3 with a suitability-for-isolation marking — meaning it provides visible contact gap and positive break indication for safe lockout/tagout. The 6 kV impulse withstand voltage (Uimp) and pollution degree 3 rating confirm it handles industrial environments with conductive contamination. Mechanical durability of 50,000 cycles and electrical durability of 10,000 cycles give a realistic service life for infrequent manual isolation — not a daily-operating switch.
Mounts on DIN rail (35 mm), fixed position. Occupies 54 mm width (6 x 9 mm pitches) — standard for a 3-pole 100 A switch disconnector in the Acti9 range. Depth 70 mm, height 77 mm; check gland plate clearance if retrofitting into a shallow enclosure. Strip 9 mm. The IP4 rating means protection against solid objects >1 mm — fine for dry indoor panels, not washdown areas. Comb busbar compatible (standard profile). Toggle control with ON/OFF indication and contact position indicator gives clear visual status for isolation verification.