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VC181256U111 Datasheet(PDF) 10 Page - AVX Corporation |
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VC181256U111 Datasheet(HTML) 10 Page - AVX Corporation |
10 / 10 page 10 TransGuard ® AVX Multilayer Ceramic Transient Voltage Suppressors Repetitive Peak Current Strikes TransGuard ® 1210 1.5J Product 10% 8% 4% 2% 0% 6% 0 100 200 300 400 500 600 Number of Strikes VC121018J390 Figure 3 30% 25% 15% 5% 10% 0% 20% 0 100 200 300 400 500 600 Number of Strikes VC08LC18A500 Figure 4 Repetitive Peak Current Strikes StaticGuard 0805 0.1J Product PULSE DEGRADATION Traditionally varistors have suffered degradation of electrical perfor- mance with repeated high current pulses resulting in decreased breakdown voltage and increased leakage current. It has been suggested that irregular intergranular boundaries and bulk material result in restricted current paths and other non-Schottky barrier paralleled conduction paths in the ceramic. Repeated pulsing of both 5.6 and 14V TransGuard ® transient voltage suppressors with 150 Amp peak 8 x 20μS waveforms shows negligible degradation in breakdown voltage and minimal increases in leakage current. This does not mean that TransGuard ® suppressors do not suffer degradation, but it occurs at much higher current. The plots of typical breakdown voltage vs number of 150A pulses are shown below. TYPICAL PERFORMANCE CURVES (0603, 0805, 1206 & 1210 CHIP SIZES) VC060305A150 VC060326A580 VC06LC18X500 100 80 60 40 20 0 020 40 Frequency (MHz) 60 80 100 VC080518C400 VC080514A300 VC080505C150 100 80 60 40 20 0 020 40 Frequency (MHz) 60 80 100 VC120648D101 VC12LC18A500 VC120614D300 100 80 60 40 20 0 020 40 Frequency (MHz) 60 80 100 TransGuard® Capacitance vs Frequency 0603 TransGuard® Capacitance vs Frequency 0805 TransGuard® Capacitance vs Frequency 1206 10% 8% 4% 2% 0% 6% 0 100 200 300 400 500 600 Number of Strikes VC120618D400 VC120626D580 VC120614D300 VC120605D150 Figure 1 Repetitive Peak Current Strikes TransGuard ® 0805 0.1J and 0.3J Products 0% 5% 10% 15% 0 100 200 300 400 500 600 Number of Strikes VC080518C400 VC080518A400 Figure 2 Repetitive Peak Current Strikes TransGuard ® 1206 0.4J Product CAPACITANCE/FREQUENCY CHARACTERISTICS |
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