ABB OVRT23L40320PTSU Overvoltage Relay With Plug In Terminal

ABB System pro M compact OVRT23L40320PTSU is a 3‑pole Type 2 surge protective device (SPD) designed for 320/640 V AC systems and DIN rail mounting with a plug‑in terminal. It provides L–L and L–G protection for three‑phase installations, featuring a 200 kA SCCR, 40 kA peak surge current, and 20 kA nominal discharge current at 50/60 Hz. The unit responds in under 25 nanoseconds and includes a state/remote indicator to monitor protection status. Encased in a gray NEMA 1 enclosure, the compact housing measures about 53.4 mm wide, 64.8 mm deep, and 98.5 mm high, making it suitable for control cabinets where space is at a premium. This OVRT23L40320PTSU plug‑in terminal variant is part of ABB’s System pro M compact surge protection family, commonly deployed to safeguard drives, PLCs, and other sensitive equipment connected to 230/400 V networks, helping to contain voltage transients and extend the life of protected devices within industrial or commercial electrical systems.