The BSP3 Series are 3-leaded devices that protect Line-Ground, Line-Neutral, and Neutral-Ground connectionsProtects against surges and transients per ANSI C62.41-2002category C low (6KV, 1.250S & 3KA, 820S) standard Combowaves and (6KV, 100KHz) Ring waveProtects against surges and transients per new ANSI C82.77-5 2015category C medium (10KV, 1.250S & 5KA, 820S) standard Combowaves and (6KV, 100KHz) Ring waveUL Recognized Component in the United States and Canada(UL935, UL1029), Some models Recognized to UL1449 (see below)High temperature, flameproof plastic enclosure, 85C max surface temp rating120V Model: Protection for LED drivers capable of operating at120V nominal input voltage.240V Model: Protection for LED drivers capable of operating at240V nominal input voltage or with universal input range of 120Vthrough 240V. Not suitable for 120V-only devices.347V Model: Protection for LED drivers capable of operating at347V nominal input voltage or with universal input range of 277Vthrough 347V. Not suitable for 120V, 240V or 277V -only devices.277V Model: Protection for LED drivers capable of operating at277V input voltage or with universal input range of 120V through 277V.Not suitable for 120V- or 240V-only devices.480V Model: Protection for LED drivers capable of operating at 480Vinput voltage or with universal input ranges of 277V through 480V or347V through 480V. Not suitable for 277V- or 347V-only devices.