ABB OVRT240440PTSU Overvoltage Relay

ABB OVRT240440PTSU is a one-pole surge protective device (SPD) designed for 600/347 V Wye systems, delivering ultra-fast transient suppression with a response time under 25 ns and a maximum discharge current of 40 kA (8/20 μs). The device uses a nominal voltage of 347 VAC (±15%), with a maximum continuous operating voltage of 440 VAC and a voltage protection level (U_res) of 1.3/1.4/1.5 kV depending on test class (UL 1449 3rd Ed Type 4 for Type 2 apps; IEC 61643-1 2nd Ed Type 2/II). It provides a nominal discharge current In of 10 kA and a maximum discharge current Imax of 40 kA, with an Isccr rating of 200 kA, and leakage current below 0.1 mA. The unit includes an integrated thermal disconnector, state indicator, and remote indicator, and offers disconnector options for B/C curves up to 125 A and a J-class fuse option up to 100 A. This ABB OVRT240440PTSU is designed for protection of downstream equipment such as motors, drives, and controls in commercial or industrial panels, helping to minimize damage from lightning and utility surges while enabling clear local/remote status monitoring.