SIOV metal oxide varistor interface module, 8 channels individual connect. Continuous maximum working voltage: 60VAC(RMS) / 85VDC. Breakdown voltage(at 1mA): 100V, Clamping voltage: 165V(50A), Transient peak current: 4500A. Ease of connection with the use of screw connection terminal blocks. High quality FR-4 fiber glass PCB.