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V14E275 Datasheet(PDF) 4 Page - Littelfuse |
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V14E275 Datasheet(HTML) 4 Page - Littelfuse |
4 / 12 page 39 www .littelfuse .com 2 Varistor Products UltraMOV™ Varistor Series High Surge Current, Radial Lead Device Ratings and Specifications (Continued) V10E550 10V550 550 745 90 819 1001 1500 25 100 V14E550 14V550 550 745 180 819 1001 1500 50 180 V20E550 20V550 550 745 360 819 1001 1500 100 300 V10E625 10V625 625 825 100 900 1100 1650 25 90 V14E625 14V625 625 825 200 900 1100 1650 50 160 V20E625 20V625 625 825 400 900 1100 1650 100 250 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. Device Ratings and Specifications (Continued) BRANDING MAXIMUM RATING (85 oC) SPECIFICATIONS (25oC) CONTINUOUS TRANSIENT VARISTOR VOLTAGE AT 1mA DC TEST CURRENT MAXIMUM CLAMPING VOLTAGE 8 x 20 µs TYPICAL CAPACI- TANCE RMS VOLTS DC VOLTS ENERGY 2ms PEAK CURRENT 8 x 20 µs V M(AC) VM(DC) WTM VNOM MIN VNOM MAX VC IPK f = 1MHz (V) (V) (J) ITM 1 x PULSE (A) 3500 6000 10000 3500 6000 10000 2500 4500 6500 2500 4500 6500 ITM 2 x PULSE (A) (V) (V) (A) (pF) V10E550P P10V550 V14E550P P14V550 V20E550P P20V550 V10E625P P10V625 V14E625P P14V625 V20E625P P20V625 LEAD-FREE AND RoHS COMPLIANT MODELS STANDARD MODELS Pb RoHS BRANDING PART NUMBER PART NUMBER 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 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 = VirtualTime 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 2. PEAK PULSE CURRENT TEST WAVEFORM Power Dissipation Ratings Should transients occur in rapid succession, the average power dissipa- tion 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. Furthermore, the operating values need to be derated at high temperatures as shown in Figure 1. Because varistors can only dissipate a relatively small amount of average power they are, therefore, not suitable for repetitive applications that involve substantial amounts of average power dissipation. Pb RoHS |
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