UL 1449 Suppressed Voltage Rating: 330V ( L-N, L-G, N-G ) - The lower the clamping voltage number, the better your equipment is protected. 330V is the best clamping voltage recognized by UL.Response Time: <1 nanosecond - Exceptionally quick response time to prevent harmful surges from reaching your equipment.Electrical Rating: 125V / 60 Hz / 15A / 1875W.Joule Rating: 810 ( 8 x 20 uS ) - The joule rating indicates the amount of energy the surge protector can absorb. The higher the rating, the better the protection.Maximun Peak Pulse Current: 40,000A ( 8 X 20 uS )Maximun Surge Pulse Voltage: 6,000V ( 1.2 X 50 uS )EMI/RFI Noise Filtering: Up to 20 dB from 100KHz to 100MHz - EMI/RFI filtering provides more effective surge protection and power filtering against signal distortion.