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V625LA10P Datasheet(PDF) 4 Page - Littelfuse |
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V625LA10P Datasheet(HTML) 4 Page - Littelfuse |
4 / 13 page Varistor Products ©2010 Littelfuse, Inc. Revision: August 4, 2010 LA Varistor Series Radial Lead Varistors > LA Series Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/la.html for current information. 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 device.The operating values of a MOV need to be derated at high temperatures as shown in the diagram below. 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. Power Dissipation Ratings 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 ( oC) Peak Pulse Current Test Waveform Current Energy and Power Derating Curve 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 μs Current Waveform: 8μs = T 1 = Rise Time 20μs = T 2 = Decay Time 100 90 50 10 O1 T T1 T2 TIME Figure 1 Figure 2 |
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