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V130LA1 Datasheet(PDF) 4 Page - Littelfuse |
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V130LA1 Datasheet(HTML) 4 Page - Littelfuse |
4 / 11 page 59 www .littelfuse .com 2 Varistor Products LA Varistor Series Line Voltage Operation, Radial Lead Device Ratings and Specifications (Continued) Power Dissipation Ratings 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 Figure 1. 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. V660LA10 10 660L 660 850 70 2500 940 1210 1820 25 70 V660LA50A 14 660L50 660 850 140 4500 940 1210 1820 50 200 V660LA100B 20 660L100 660 850 250 6500 940 1100 1650 100 400 V1000LA80A 14 1000L80 1000 1200 220 4500 1425 1800 2700 50 130 V1000LA160B 20 1000L160 1000 1200 360 6500 1425 1600 2420 100 250 NOTE: Average power dissipation of transients not to exceed 0.25W, 0.4W, 0.6W or 1W for model sizes 7mm, 10mm, 14mm and 20mm, respectively. PART NUMBER MODEL SIZE DISC DIA. (mm) DEVICE MODEL NUMBER BRAND- ING MAXIMUM RATING (85 oC) SPECIFICATIONS (25oC) CONTINUOUS TRANSIENT VARISTOR VOLT- AGE AT 1mA DC TEST CURRENT MAXIMUM CLAMPING VOLTAGE 8 x 20µs TYPICAL CAPACI- TANCE f = 1MHz VRMS VDC ENERGY 10 x 1000µs PEAK CURRENT 8 x 20µs VM(AC) VM(DC) WTM ITM VNOM MIN VNOM MAX VC IPK C (V) (V) (J) (A) (V) (V) (A) (pF) 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) FIGURE 1. CURRENT, ENERGY AND POWER DERATING CURVE FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM 100 90 50 10 O1 T T1 T2 TIME O1 = Virtual Origin of Wave T = Time From 10% to 90% of Peak T1 = Virtual Front time = 1.25 • t T2 = Virtual Time to Half Value (Impulse Duration) Example: For an 8/20µs Current Waveform: 8µs = T1 = Virtual Front Time 20µs = T2 = Virtual Time to Half Value |
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