Varistor Metal Oxide Varistor Products Page 96 Varistor Metal-Oxide Varistor Products

2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/14/17 Metal-Oxide Varistors (MOVs) Radial Lead Varistors > UltraMOV Varistor Series Epoxy Coated Models Phenolic Coated Models Maximum Rating (85C) Specifications (25C) Continuous Transient Varistor Voltage at 1mA DC Test Current Maximum Clamping Voltage 8 x 20 s Typical Capacitance RMS Volts DC Volts Energy 2ms Peak Current 8 x 20 s Part Number Branding Part Number Branding V M(AC) V M(DC) W TM I TM 1 x Pulse I TM 2 x Pulse V NOM Min V NOM Max V C I PK f = 1MHz (V) (V) (J) (A) (A) (V) (V) (V) (A) (pF) V14E460P P14V460 V14P460P P14P460 460 615 180 6000 4500 675 825 1240 50 220 V20E460P P20V460 V20P460P P20P460 460 615 360 10000 6500 675 825 1240 100 400 V07E510P P7V510 V07P510P P7P510 510 670 52 1750 1200 738 902 1355 10 40 V10E510P P10V510 V10P510P P10P510 510 670 92 3500 2500 738 902 1355 25 110 V14E510P P14V510 V14P510P P14P510 510 670 185 6000 4500 738 902 1355 50 200 V20E510P P20V510 V20P510P P20P510 510 670 365 10000 6500 738 902 1355 100 350 V10E550P P10V550 V10P550P P10P550 550 745 95 3500 2500 819 1001 1500 25 100 V14E550P P14V550 V14P550P P14P550 550 745 190 6000 4500 819 1001 1500 50 180 V20E550P P20V550 V20P550P P20P550 550 745 370 10000 6500 819 1001 1500 100 300 V10E625P P10V625 V10P625P P10P625 625 825 100 3500 2500 900 1100 1650 25 90 V14E625P P14V625 V14P625P P14P625 625 825 200 6000 4500 900 1100 1650 50 160 V20E625P P20V625 V20P625P P20P625 625 825 400 10000 6500 900 1100 1650 100 250 Ratings & Specifications (Continued...) NOTE: 1. Average power dissipation of transients should not exceed 0.25W, 0.4W, 0.6W and 1.0W for 7mm, 10mm, 14mm, and 20mm model sizes, respectively. Should transients occur in rapid succession, the average power dissipation is the energy (watt-seconds) per pulse times the number of pulses per second. The power so developed must be within the specifications shown on the Device Ratings and Specifications Table for the specific Current Energy and Power Dissipation Ratings Peak Pulse Current Test Waveform 100 90 50 10 O 1 T 1 T 2 TIME PERCENT OF PEAK VALUE 0 1 = Virtual Origin of Wave T = Time from 10% to 90% of Peak T 1 = Rise Time = 1.25 x T T 2 = Decay Time Example - For an 8/20 s Current Waveform: 8 s = T 1 = Rise Time 20 s = T 2 = Decay Time 100 90 80 70 60 50 40 30 20 10 0 -55 50 60 70 80 90 100 110 120 130 140 150 AMBIENT TEMPERATURE ( o C) PERCENT OF RATED VALUE Figure 1A - Power Derating for Epoxy Coated Figure 2 100 90 80 70 60 50 40 30 20 10 0 -55 50 60 70 80 90 100 110 120 130 140 150 AMBIENT TEMPERATURE ( o C) PERCENT OF RATED VALUE device. The operating values of a MOV need to be derated at high temperatures as shown above. Because varistors only dissipate a relatively small amount of average power they are not suitable for repetitive applications that involve substantial amounts of average power dissipation. Figure 1B - Power Derating for Phenolic Coated

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