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V131HB34 Datasheet(PDF) 3 Page - Littelfuse |
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V131HB34 Datasheet(HTML) 3 Page - Littelfuse |
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3 / 4 page  2 HB34 Varistor Series Varistor Products High Energy Industrial 87 www .littelfuse .com Power Dissipation Ratings Should transients occur in rapid succession, the average power dissipation result is simply 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 must be derated as shown in Figure 1. Transient V-I Characteristics Curves 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 8/20 µs Current Waveform: 8 µs = T1 = Virtual Front Time 20 µs = T2 = Virtual Time to Half Value FIGURE 3. CLAMPING VOLTAGE FOR V131HB34 - V751HB34 10000 1000 100 CURRENT (A) V751HB34 V131HB34 V321HB34 V511HB34 V481HB34 V571HB34 V661HB34 TA = -55 oC TO 85oC MAXIMUM CLAMPINGVOLTAGE VARISTOR SIZE 34mm 130 TO 750 VM(AC) RATING V271HB34 V251HB34 V151HB34 V421HB34 -5 -4 1E-3 0.01 0.1 1 10 100 1,000 10,000 100,000 Next Previous |
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