The Schneider Electric TA10D3L0804TPE is an automatic transfer switch from the TransferPacT range, designed to change the source of supply between two AC feeds — typically mains and generator or mains and mains — without interrupting the load. Rated 80 A at 400 V AC 50/60 Hz, it handles uninterrupted duty in AC-32B utilization category, which covers mixed resistive and moderate motor loads common in commercial and light industrial backup power schemes. It is a PC-class transfer switch (IEC 60947-6-1), meaning it is tested for both making and breaking load current but not for fault interruption — upstream protection (a circuit breaker or fuse) clears any downstream fault. The 3-pole configuration suits three-phase systems; the switch includes mechanical interlocking to prevent both sources closing simultaneously.
Short-time withstand (Icw) is 5 kA for 0.1 s, which tells you the switch can ride through a fault until the upstream breaker clears, provided the let-through energy stays below that threshold. Making capacity (Icm) is 15 kA for the switch-disconnector alone at 400 V AC, rising to 75 kA when paired with an upstream protection circuit breaker. That 75 kA figure is the coordination rating — it means the switch can close onto a fault and survive until the breaker opens, which is critical for generator transfer schemes where the switch might close onto a bolted fault. Impulse withstand (Uimp) is 6 kV for both switch and controller, adequate for surge environments in standard distribution panels.
Mounting and enclosure integration
The 310 mm width and 147 mm height mean it occupies roughly the footprint of a 3-pole MCCB; plan for that space in the enclosure layout. Front face is IP40 in auto mode (tools required to access terminals), and IP20 inside the enclosure in manual mode — adequate for indoor panel use, not for washdown environments. Connection is screwed terminals top and bottom, so expect to torque according to the manufacturer's specification. The switch includes a padlockable OFF position and a contact position indicator showing all three pole states. Signal contacts are configurable as 1 NO + 2 NC or 1 NC + 2 NO or 2 NO — wire these to the building management system or generator controller for status feedback.