The Schneider Electric TA1AD4L16H4TPE is a TransferPacT automatic transfer switch (ATS) rated for 1600 A uninterrupted duty, 4 poles, with a PC-class switch per IEC 60947-6-1. It automatically transfers the load between two AC sources (typically utility and generator) when one source fails or returns — no operator action needed. The AC-33B utilization category means it handles mixed motor, resistive, and lightly inductive loads including switching of motors, transformers, and discharge lamps, which is the common mix in commercial and industrial backup-power panels.
Short-time withstand (Icw) is 50 kA for 0.5 s and 70 kA for 0.1 s, meaning the switch can survive a fault current of that magnitude for that duration without welding or damage — critical for selective coordination with upstream breakers. Short-circuit making capacity (Icm) is 105 kA as a standalone switch-disconnector, rising to 154 kA when paired with an upstream circuit breaker; that tells you the switch can close onto a fault without failing. Impulse withstand (Uimp) is 12 kV for the switch, 6 kV for the controller — covers typical surge environments in industrial panels.
This is a fixed-mount, plate-mounted transfer switch — not DIN-rail or panel-door. Dimensions: 540 mm wide, 391 mm high, 383.5 mm deep. Connection pitch is 115 mm. Both upside and downside connections are screwed terminals, so plan for busbar or cable lugs. The front face is IP40 in auto mode (finger-safe), and inside the enclosure it's IP20 manual mode. Mechanical interlocking between sources is built in, preventing both sources from closing simultaneously. A padlockable OFF position is provided for lockout/tagout. The LCD screen shows operating mode and status. Signal contacts include 1 NO + 2 NC or 1 NC + 2 NO or 2 NO configurations (field-configurable).