NTE1V010 thru NTE1V300 NTE2V010 thru NTEV480 NTE524V13 thru NTE524V48 Metal Oxide Varistors (MOV) Description: The NTE Metal Oxide Varistors feature a barrier layer that gives the user fast response time. These devices have a high transient current handling capability when high voltage is applied. Static resistance is, however, very high under low voltage conditions, permitting low standby drain currents. The NTE 1V Series Varistors have a non–linear voltage/current characteristic as expressed by the relationship: I Where I V K n = = = = = KVn The current in amperes The voltage A constant A constant which shows the dependence of the voltage V upon the current I. It is called the voltage–dependant index Features: D High Transient Current Capability – up to 6500A D Fast Response Time – less than 35ns D Excellent Voltage Clamping Characteristics D Very Low Temperature Coefficient D Low Standby Current D D D D D High Energy Capability The Value for “n” is Greater Very Low Leakage Current Low Capacitance Low Overshoot Characteristics Electrical Ratings: Varistor Voltage The voltage across the varistor at a DC current of 1.0mA. Energy The maximum electrical energy which can be dissipated within the varistor by a single impulse of 10 x 1000µs current waveform with continuous voltage applied. Energy ratings are based on a shift of varistor voltage of less than 10% of the initial value. The unit is expressed in joules. Peak Current The maximum current allowable for a single pulse of 8 x 20µs exponential waveform. Operating Ambient Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +85°C Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –40° to +125°C Response Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . less than 35ns Voltage Temperature Coefficient . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . less than 0.05%/°C Non–Linear Exponent NTE1V010 to NTE1V075, NTE2V010 to NTE2V075 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 to 50 NTE1V095 to NTE1V300, NTE2V095 to NTE2V480, NTE524V13 to NTE542V48 . . . . . . . . . . . greater than 40 Maximum Leakage Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10µA Electrical Characteristics: Maximum Ratings (TA = 25°C) Continuous Characteristics Transient Peak Current (8/20µs) (Amps) Nominal Varistor Voltage @ 1mA DC Test Current (Volts) Maximum Clamping Voltage, VC @ Test Current (8/20µs) (Volts) Transient Power Dissipation (Watts) RMS Voltage (Volts) DC Voltage (Volts) Energy (10/1000µs) (Joules) Vm (AC) Vm (DC) WTM ITM VNOM VCL PD 10 12 0.8 250 18 45 0.25 16mm 10 12 3.5 1000 18 45 0.60 8.5mm 14 18 1.2 250 22 55 0.25 16mm 10 12 4.0 1000 22 55 0.60 8.5mm 15 20 1.0 250 24 52 0.25 16mm 15 20 4.5 1000 24 48 0.60 1V017 8.5mm 17 22 1.3 250 27 60 0.25 2V017 16mm 17 22 5.0 1000 27 60 0.60 1V020 8.5mm 20 26 1.5 250 33 70 0.25 2V020 16mm 20 26 6.0 1000 33 70 0.60 1V025 8.5mm 25 31 1.7 250 39 80 0.25 2V025 16mm 25 31 7.0 1000 39 80 0.60 1V030 8.5mm 30 38 2.3 250 47 95 0.25 2V030 16mm 30 38 8.5 1000 47 95 0.60 1V035 8.5mm 35 45 2.7 250 56 110 0.25 2V035 16mm 35 45 10.0 1000 56 110 0.60 1V040 8.5mm 43 55 3.2 250 68 135 0.25 2V040 16mm 43 55 13.0 1000 68 135 0.60 1V050 8.5mm 52 66 4.0 250 82 150 0.25 2V050 16mm 52 66 14.0 1000 82 150 0.60 1V060 8.5mm 63 80 6.0 1200 100 175 0.25 2V060 16mm 63 80 18.0 4500 100 175 0.60 1V075 8.5mm 75 95 5.0 1200 120 205 0.25 2V075 16mm 75 95 21.0 4500 120 205 0.60 1V095 8.5mm 95 125 7.0 1200 150 250 0.25 2V095 16mm 95 125 29.0 4500 150 250 0.60 1V115 8.5mm 115 150 10.0 1200 171 295 0.25 2V115 16mm 115 150 35.0 4500 171 300 0.60 1V130 8.5mm 135 180 10.0 1200 216 355 0.25 2V130 16mm 135 180 39.0 4500 216 355 0.60 524V13 23mm 135 180 72.0 6500 216 355 1.00 1V150 8.5mm 160 210 10.0 1200 240 410 0.25 2V150 16mm 160 210 40.0 4500 240 410 0.60 524V15 23mm 160 210 80.0 6500 240 410 1.00 1V175 8.5mm 170 225 12.0 1200 270 450 .025 524V17 23mm 170 225 90.0 6500 270 450 1.00 1V250 8.5mm 240 320 20.0 1200 390 630 0.25 NTE Type Number Case Diameter 1V010 8.5mm 2V010 1V014 2V014 1V015 2V015 2V250 16mm 240 320 70.0 4500 390 630 0.60 524V25 23mm 240 320 129.0 6500 390 630 1.00 1V275 8.5mm 260 330 20.0 1200 430 685 0.25 2V275 16mm 260 330 72.0 4500 430 685 0.60 524V27 23mm 260 330 135.0 6500 430 685 1.00 Electrical Characteristics (Cont’d): Maximum Ratings (TA = 25°C) Continuous Peak Current (8/20µs) (Amps) Nominal Varistor Voltage @ 1mA DC Test Current (Volts) WTM ITM VNOM VCL PD 22.0 1200 470 740 0.25 79.0 4500 470 740 0.60 370 149.0 6500 470 740 1.00 560 90.0 4500 680 1110 0.60 420 560 160.0 6500 680 1110 1.00 480 640 105.0 4500 750 1240 0.60 480 640 180.0 6500 750 1240 1.00 RMS Voltage (Volts) DC Voltage (Volts) Vm (AC) Vm (DC) 280 370 16mm 280 370 524V30 23mm 280 2V420 16mm 420 524V42 23mm 2V480 16mm 524V48 23mm NTE Type Number Case Diameter 1V300 8.5mm 2V300 Characteristics Transient Energy (10/1000µs) (Joules) Maximum Clamping Voltage, VC @ Test Current (8/20µs) (Volts) Transient Power Dissipation (Watts) Cautions: NTE varistors short–circuit when subjected to surges beyond their peak current and energy ratings. NTE varistors short–circuit when operated at steady–state voltages well beyond their voltage ratings, which may eventually result in open–circuiting leaving the circuit without protection. The following precautions should be taken to minimize this potential hazard: D D D Fusing the varistor to limit high fault currents. Protecting the surrounding circuitry by physical shielding. Locating the varistor away from other components. Typical Power Supply Circuit 100µH D + 0.1µF 150µF – D LS LL L LD D H 1V Series .345 (9.0) .235 (6.0) 2V Series .699 .275 (17.8) (7.0) H 524V Series .945 .291 (24.0) (7.4) L LL LS LD .475 1.000 .200 .024 (12.0) (25.4) (5.08) (0.6) .787 1.000 .315 (20.0) (25.4) (8.0) .031 (0.8) 1.230 1.063 .394 .039 (31.0) (27.0) (10.0) (1.0)