The Schneider Electric TA10D4L0404TPE is a TransferPacT automatic transfer switch (ATS) rated for 40 A continuous at 400 V AC, 50/60 Hz, with 4 poles. It is designed to change the source of supply — typically between a primary utility feed and a backup generator — in an uninterrupted duty cycle. The PC-class switch carries a mechanical interlock and a contact position indicator, with three positions (I, 0, II) and a padlockable OFF position.
Rated operational current (Ie) is 40 A at 400 V AC, with a conventional free-air thermal current (Ith) of 40 A at 60 °C — so the switch is sized for a 40 A feeder without derating at that ambient. The utilization category is AC-33B per IEC 60947-6-1, which covers motor loads plus resistive and mixed loads typical of emergency supply switching; AC-33B is the more demanding category for ATS gear, meaning the switch is tested for combined motor and lighting/heating loads during transfer. Short-circuit performance: rated short-time withstand current (Icw) is 5 kA for 0.1 s, and the rated short-circuit making capacity (Icm) is 15 kA for the switch-disconnector alone at 400 V AC. With an upstream protection circuit breaker, the making capacity rises to 75 kA at 400 V AC — a key coordination figure for the panel designer sizing the upstream breaker. The switch is suitable for isolation, per the listing.
Dimensions: 310 mm wide, 147 mm high, 94 mm deep. Both upside and downside connections are screwed terminals. Control is via 4 push-buttons and an LCD screen, with automatic or manual operating mode selectable.