2CTB803871R1200

The ABB OVR T2 40-440 P QS (2CTB803871R1200) is a single-pole Type 2 surge protective device designed to protect low-voltage electrical installations and connected equipment against transient overvoltages caused by indirect lightning strikes and switching operations. Tested in accordance with IEC/EN 61643-11, it is suitable for compatible TT, TN-C, TN-S and IT electrical distribution systems. The device has a rated voltage of 230 V AC, a maximum continuous operating voltage of 440 V AC, a nominal discharge current of 20 kA and a maximum discharge current of 40 kA using an 8/20 μs current waveform. It provides a voltage protection level of 1.8 kV and is designed for installation in main and sub-distribution boards. Its compact, plug-in construction is compatible with ABB System pro M compact products and allows mounting on a standard 35 mm DIN rail. The device has an IP20 protection rating and supports suitable upstream backup protection. It is intended for residential, commercial and industrial installations requiring Type 2 surge protection.