The VDRUS series comes in four inner disc sizes: 7mm, 10mm, 14mm, and 20mm diameters. Maximum continuous voltage ranges from 115VRMS to 680VRMS and 150VDC to 895VDC. Maximum energy ranges from 19 to 720 Joules. Maximum non-repetitive transient current ranges from 1,800A for 7mm size to 13kA for 20mm size. The VDRUS varistors are UL/VDE recognized, RoHS compliant and halogen-free.