Surge Protection Device PanelNominal Discharge Current 10/20 kA Voltage 120/208 Phase 3YMax. Surge Current Per Phase 100kAMax. Continuing Operating Voltage 150 Voltage Protection Rating 1000V (L-N) 1500V (L-G) 700V (N-G). 1500V (L-L)Modes of Protection 4 Mounting Style Surface or Flush Material of Construction MetalNoise Reduction Rating NRR -20dB to -40dB (50KHz-10MHz)Length 14.9 In. Width 10.31 In. Depth 5 In. Standards UL1449 3rd Ed.Includes Flushmount Collar