2CTB803973R0500

The ABB OVR T2 3N 40-275 P TS QS (2CTB803973R0500) is a four-pole Type 2 surge protective device designed to protect low-voltage electrical installations and connected equipment against transient overvoltage's caused by indirect lightning effects and switching operations. It is suitable for three-phase 230/400 V AC distribution systems using TT and TN-S earthing arrangements.

The device provides protection for three phases and neutral, with a maximum continuous operating voltage of 275 V AC (L–PE), a nominal discharge current of 20 kA and a maximum discharge current of 40 kA (8/20 μs waveform). It features a plug-in cartridge design for convenient replacement and includes an auxiliary signaling contact (TS) for remote monitoring of its operating status. The device is designed for 35 mm DIN-rail mounting and is suitable for residential, commercial and industrial electrical distribution boards.