Varistor Metal Oxide Varistor Products Page 106 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 TM 25S Varistor Series Ratings & Specifications Part Number Branding Maximum Rating (85C) Specifications (25C) Continuous Transient Varistor Voltage at 1mA DC Test Current Maximum Clamping Voltage at 100A, 8 x 20 s UL 1449 Voltage Protection Rating Typical Capaci- tance f = 1MHz AC Volts DC Volts Energy 2ms Peak Surge Current 8 x 20 s V M(AC)RMS V M(DC) W TM 1 x Pulse I TM 1 x Pulse V NOM Min V NOM Max V C VPR C (V) (J) (A) (V) (pF) V25S115P P25S115 115 150 230 22000 162 198 295 400 4500 V25S130P P25S130 130 170 255 22000 184.5 225.5 335 500 3900 V25S140P P25S140 140 180 285 22000 198 242 355 500 3500 V25S150P P25S150 150 200 300 22000 216 264 390 500 3200 V25S175P P25S175 175 225 315 22000 243 297 450 600 2550 V25S230P P25S230 230 300 400 22000 324 396 585 700 1900 V25S250P P25S250 250 320 435 22000 351 429 640 800 1750 V25S275P P25S275 275 350 470 22000 387 473 700 900 1610 V25S300P P25S300 300 385 500 22000 423 517 765 1000 1450 V25S320P P25S320 320 420 540 22000 459 561 825 1000 1350 V25S385P P25S385 385 505 630 22000 558 682 1010 1200 1080 V25S420P P25S420 420 560 655 22000 612 748 1100 1500 1000 V25S440P P25S440 440 585 675 22000 643.5 786.5 1160 n/a 900 V25S460P P25S460 460 615 690 22000 675 825 1220 n/a 870 V25S510P P25S510 510 670 700 22000 738 902 1335 n/a 820 V25S550P P25S550 550 745 765 22000 819 1001 1475 n/a 750 V25S625P P25S625 625 825 800 22000 900 1100 1625 n/a 660 V25S750P P25S750 750 970 890 22000 1080 1320 1950 n/a 550 Note: Average powder dissipation of transients should not exceed 1.5 watts. For applications exceeding 85C ambient temperature, the peak surge current and energy ratings must be reduced as shown above. Peak Current, Energy and Power Derating Curve 0 20 40 60 80 100 55 50 60 70 80 90 100 110 120 130 PERCENT OF RATED VALUE AMBIENT TEMPERATURE (C) 0 50 100 PERCENT OF PEAK VALUE TIM E t 1 t 2 t O 1 Peak Pulse Current Test Waveform for Clamping Voltage Transient V-I Characteristics Curves 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 Figure 1 Figure 2

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