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TMOV20R510M Datasheet(PDF) 6 Page - Littelfuse |
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TMOV20R510M Datasheet(HTML) 6 Page - Littelfuse |
6 / 9 page 2 Varistor Products 29 www .littelfuse .com TMOV® and iTMOV® Varistor Series * Figure 4: Typical time to open circuit under UL1449 Abnormal Overvoltage Limited Current Test 0.1 1 10 10 100 1000 10000 Time s 0.125A 0.5A 2.5A 5A Typical For applications exceeding 85ºC ambient temperature, the peak surge current and energy ratings must be reduced as shown in Figure 3. Figure 5: Peak Current & Energy Derating Curve 0 20 40 60 80 100 -55 50 60 70 80 90 100 110 120 130 AMBIENT TEMPERATURE (ºC) Thermal Characteristics Transient V-I Characteristic Curves 100 1000 10000 0.000001 0.00001 0.0001 0.001 0.01 0.1 1 10 100 1000 10000 Peak Current (A) 175V 150V 140V 130V 320V 275V 250V 230V Figure 6: V-I Characteristic Curves for 14mm Types 420V 385V 115V Maximum Leakage Current Maximum Clamping Voltage 14mm 200V 100 1000 10000 0.000001 0.00001 0.0001 0.001 0.01 0.1 1 10 100 1000 10000 Peak Current (A) 175V 150V 140V 130V 320V 275V 250V 230V Figure 7: V-I Characteristic Curves for 20mm Types 420V 385V 115V Maximum Leakage Current Maximum Clamping Voltage 20mm 200V 460V 510V 550V 575V 625V 750V 300V Figure 9: Pulse Rating Curves for 20mm types 1 10 100 1000 10000 10 100 1000 10000 Impulse Duration ( µs) 1 10 2 10 3 ∞ ∞ Model 20 mm 2 10 4 10 5 10 6 10 Figure 8: Pulse Rating Curves for 14mm types 1 10 100 1000 10000 10 100 1000 10000 Impulse Duration ( µs) 1 10 10 2 10 3 ∞ Model 14 mm 2 10 4 10 5 10 6 Pulse Rating Curves Note : The TMOV and iTMOV varistors are intended, in conjunction with appropriate enclosure design, to help facilitate TVSS module compliance to UL 1449, Section 37.4 (abnormal over-voltage limited current require- ments). Under these extreme abnormal over-voltage conditions, the units will exhibit substantial heating and potential venting prior to opening. Modules should be designed to contain this possibility. Application testing is strongly recommended. Thermally Protected |
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