CA Series S E M I C O N D U C T O R Industrial High Energy Metal-Oxide Disc Varistors March 1995 Features * Provided Unpackaged For Unique Packaging By Customer * Solderable Electrode Finish Also Provides Pressure Contacts for Stacking Applications * Available Disc Sizes . . . . . . . . . . . 32mm, 40mm, and 60mm Diameter * Wide Operating Voltage Range VM(AC)RMS . . . . . . . . . . 130V to 2800V * Wide Peak Pulse Current Range ITM . . . . . . . . . . . 20,000A to 70,000A CA SERIES * Very High Energy Capability WTM . . . . . . . . . . . . . . . . 200J to 10,000J Description CA series transient surge suppressors are industrial highenergy disc varistors intended for special applications requiring unique contact or packaging considerations. The electrode finish of these devices is solderable and can also be used as pressure contacts for stacking applications. These CA series industrial disc varistors are available in Absolute Maximum Ratings three diameter sizes: 32, 40, and 60mm, with disc thicknesses ranging from 1.8mm minimum to 32mm maximum. They offer a wide voltage range of from 130 to 2800 VM(AC)RMS. For information on mounting considerations refer to Applications Brief AB-8820. For ratings of individual members of a series, see Device Ratings and Specifications chart Continuous: Steady State Applied Voltage: AC Voltage Range (VM(AC)RMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DC Voltage Range (VM(DC)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Transient: Peak Pulse Current (ITM) For 8/20s Current Wave (See Figure 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Single Pulse Energy Range For 10/1000s Current Wave (WTM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . CA SERIES UNITS 130 to 2800 175 to 3500 V V 20,000 to 70,000 A 200 to 10,000 J Operating Ambient Temperature Range (TA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +85 oC Storage Temperature Range (TSTG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +125 oC Temperature Coefficient (V) of Clamping Voltage (VC) at Specified Test Current. . . . . . . . . . . . . . <0.01 %/oC Copyright (c) Harris Corporation 1995 File Number 4-34 2187.3 Specifications CA Series Device Ratings and Specifications MAXIMUM RATINGS (+85oC) CONTINUOUS SPECIFICATIONS (+25oC) TRANSIENT VRMS VDC ENERGY (2ms) PEAK CURRENT (8/20s) VARISTOR VOLTAGE AT 1mA DC TEST CURRENT MAX CLAMPING VOLT VC AT 200A CURRENT (8/20s) TYPICAL CAPACITANCE f = 1MHz MODEL NUMBER SIZE VM(AC) VM(DC) WTM ITM MIN VN(DC) MAX VC (mm) (V) (V) (J) (A) (V) (V) (V) (V) (pF) V131CA32 V131CA40 32 40 130 175 200 270 20000 30000 184 200 228 350 345 4700 10000 V151CA32 V151CA40 32 40 150 200 220 300 20000 30000 212 240 268 410 405 4000 8000 V251CA32 V251CA40 V251CA60 32 40 60 250 330 330 370 880 20000 30000 50000 354 390 429 680 650 620 2500 5000 10000 V271CA32 V271CA40 V271CA60 32 40 60 275 369 360 400 950 20000 30000 50000 389 430 473 750 730 680 2200 4500 9000 V321CA32 V321CA40 V321CA60 32 40 60 320 420 390 460 1100 20000 30000 50000 462 510 539 850 830 760 1900 3800 7500 V421CA32 V421CA40 V421CA60 32 40 60 420 560 400 600 1500 25000 40000 70000 610 680 748 1200 1130 1060 1500 3000 6000 V481CA32 V481CA40 V481CA60 32 40 60 480 640 450 650 1600 25000 40000 70000 670 750 825 1300 1240 1160 1300 2700 5500 V511CA32 V511CA40 V511CA60 32 40 60 510 675 500 700 1800 25000 40000 70000 735 820 910 1440 1350 1300 1200 2500 5000 V571CA32 V571CA40 V571CA60 32 40 60 575 730 550 770 2100 25000 40000 70000 805 910 1000 1600 1480 1420 1100 2200 4500 V661CA32 V661CA40 V661CA60 32 40 60 660 850 600 900 2300 25000 40000 70000 940 1050 1160 1820 1720 1640 1000 2000 4000 V751CA32 V751CA40 V751CA60 32 40 60 750 970 700 1050 2600 25000 40000 70000 1080 1200 1320 2050 2000 1880 800 1800 3500 V881CA60 60 880 1150 3200 70000 1290 1500 1650 2340 2700 V112CA60 V142CA60 V172CA60 V202CA60 V242CA60 V282CA60 60 60 60 60 60 60 1100 1400 1700 2000 2400 2800 1400 1750 2150 2500 3000 3500 3200 5000 6000 7500 8600 10000 70000 70000 70000 70000 70000 70000 1620 2020 2500 2970 3510 4230 1800 2200 2700 3300 3900 4700 2060 2550 3030 3630 4290 5170 2940 3600 4300 5200 6200 7400 2200 1800 1500 1200 1000 800 NOTE: Average power dissipation of transients not exceed 1.5W, 2.0W and 2.5W for model 32mm, 40mm and 60mm, respectively. Power Dissipation Ratings Continuous power dissipation capability is not an applicable design requirement for a suppressor, unless transients occur in rapid succession. Under this condition, the average power dissipation required 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. 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. 4-35 PERCENT OF PEAK VALUE CA Series PERCENT OF RATED VALUE 100 90 80 70 100 90 50 10 O1 60 T TIME T1 50 40 T2 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) 30 20 10 0 -55 50 60 Example: For an 8/20s Current Waveform: 8s = T1 = Virtual Front Time 20s = T2 = Virtual Time to Half Value 70 80 90 100 110 120 130 140 150 AMBIENT TEMPERATURE (oC) FIGURE 2. FIGURE 1. CURRENT, ENERGY AND POWER DERATING CURVE PEAK PULSE CURRENT TEST WAVEFORM Transient V-I Characteristics Curves 6,000 5,000 6,000 5,000 3,000 MAXIMUM PEAK VOLTS (V) V481CA40 2,000 V751CA32 V661CA32 V571CA32 V511CA32 V481CA32 V421CA32 1,000 900 800 700 600 500 V321CA32 V271CA32 V251CA32 400 300 V151CA32 V131CA32 200 10-3 10-2 10-1 100 101 102 PEAK AMPERES 103 104 2,000 1,000 900 800 700 600 V321CA40 500 V271CA40 V251CA40 400 V151CA40 V131CA40 200 10-1 10-2 105 30,000 MAX CLAMPING VOLTAGE DISC SIZE 60mm 250 TO 880VM(AC) RATING TA = -55oC TO +85oC V511CA60 V481CA60 V421CA60 101 102 PEAK AMPERES 103 104 105 MAX CLAMPING VOLTAGE DISC SIZE 60mm 1100 TO 2800VM(AC) RATING TA = -55oC TO +85oC 20,000 V881CA60 V751CA60 V661CA60 V571CA60 1,000 900 800 700 600 V321CA60 500 V271CA60 V251CA60 400 10,000 9,000 8,000 7,000 6,000 V282CA60 5,000 V242CA60 4,000 V202CA60 V172CA60 3,000 V142CA60 300 200 10-2 100 FIGURE 4. CLAMPING VOLTAGE FOR V131CA40 - V751CA40 MAX PEAK VOLTS (V) MAXIMUM PEAK VOLTS (V) 3,000 V421CA40 300 FIGURE 3. CLAMPING VOLTAGE FOR V131CA32 - C751CA32 6,000 5,000 4,000 2,000 TA = -55oC to +85oC V751CA40 V661CA40 V571CA40 V511CA40 TA = -55oC to +85oC 3,000 MAXIMUM PEAK VOLTS (V) 4,000 MAXIMUM CLAMPING VOLTAGE DISC SIZE 32mm 130 TO 750 VM(AC) RATING 4,000 MAXIMUM CLAMPING VOLTAGE DISC SIZE 40mm 130 TO 750 VM(AC) RATING V112CA60 10-1 100 101 102 103 PEAK AMPERES (A) 104 105 FIGURE 5. CLAMPING VOLTAGE FOR V251CA60 - V881CA60 2,000 10-2 10-1 100 101 102 PEAK AMPERES (A) 103 104 105 FIGURE 6. CLAMPING VOLTAGE FOR V112CA60 - V282CA60 4-36 CA Series Pulse Rating Curves 50,000 2 10,000 5,000 SURGE CURRENT (A) 105 10 1,000 103 104 200 100 50 20 100 1,000 IMPULSE DURATION (s) 20,000 100 50 5,000 2,000 105 106 100 50 INDEFINITE 20 100 1,000 IMPULSE DURATION (s) 100 106 50 INDEFINITE 20 2 10 DISC SIZE 60mm V251CA60 - V321CA60 50,000 20,000 10,000 102 2,000 103 1,000 104 1,000 IMPULSE DURATION (s) 10,000 DISC SIZE 60mm V421CA60 - V282CA60 1 10 2 10,000 SURGE CURRENT (A) 5,000 100 FIGURE 10. SURGE CURRENT RATING CURVES FOR V421CA40 - V751CA40 100,000 1 105 200 6 100 10 50 5,000 102 2,000 103 1,000 104 500 105 200 100 106 50 INDEFINITE 20 10 20 200 10 10,000 50,000 500 103 500 20 FIGURE 9. SURGE CURRENT RATING CURVES FOR V131CA40 - V321CA40 20,000 104 105 102 1,000 104 20 10,000 DISC SIZE 40mm V421CA40 - V751CA40 10,000 10 103 200 1,000 IMPULSE DURATION (s) 1 2 20,000 5,000 102 500 100 FIGURE 8. SURGE CURRENT RATING CURVES FOR V421CA32 - V751CA32 SURGE CURRENT (A) SURGE CURRENT (A) 104 200 10 20 2 10 10,000 SURGE CURRENT (A) 500 10,000 DISC SIZE 40mm V131CA40 - V321CA40 1 1,000 106 1,000 103 50,000 50,000 2,000 105 2,000 102 20 INDEFINITE FIGURE 7. SURGE CURRENT RATING CURVES FOR V131CA32 - V321CA32 10 10 5,000 INDEFINITE 10 20 DISC SIZE 32mm V421CA32 - V751CA32 2 10,000 106 2 2,000 10 500 1 20,000 SURGE CURRENT (A) 20,000 50,000 DISC SIZE 32mm V131CA32 - V321CA32 1 100 20 1,000 IMPULSE DURATION (s) FIGURE 11. SURGE CURRENT RATING CURVES FOR V251CA60 - V321CA60 10 20 10,000 INDEFINITE 100 1,000 IMPULSE DURATION (s) 10,000 FIGURE 12. SURGE CURRENT RATING CURVES FOR V421CA60 - V282CA60 NOTE: If pulse ratings are exceeded, a shift of VN(DC) (at specified current) of more than 10% could result. This type of shift, which normally results in a decrease of VN(DC), may result in the device not meeting the original published specifications, but does not prevent the device from continuing to function, and to provide ample protection. 4-37 CA Series Series Dimensions DISC DIAMETER PASSIVATION COLLAR ELECTRODE 2.0 MILLIMETERS 0.25 INCHES NOMINAL SIZE MIN MAX MIN MAX 32 31.0 33.0 1.220 1.299 40 38.0 40.0 1.496 1.575 60 58.0 62.0 2.283 2.441 ELECTRODE DIAMETER (SEE TABLE) THICKNESS THICKNESS (32mm DISC) MILLIMETERS THICKNESS (40mm AND 60mm DISC) INCHES MILLIMETERS INCHES VRMS VM(AC) MIN MAX MIN MAX MIN MAX MIN MAX 130 1.8 2.4 0.071 0.094 2.5 3.4 0.098 0.134 150 2.1 2.8 0.083 0.110 2.8 3.8 0.110 0.150 250 1.6 2.2 0.063 0.087 2.0 2.7 0.079 0.106 275 1.8 2.5 0.071 0.098 2.2 3.0 0.087 0.118 320 2.1 2.9 0.083 0.114 2.6 3.5 0.102 0.138 420 2.9 3.9 0.114 0.154 3.5 4.7 0.138 0.185 480 3.1 4.3 0.122 0.169 3.8 5.2 0.150 0.205 510 3.5 4.7 0.138 0.185 4.2 5.7 0.165 0.224 575 3.8 5.1 0.150 0.201 4.6 6.3 0.181 0.248 660 4.4 6.0 0.173 0.236 5.3 7.2 0.209 0.283 750 5.1 6.9 0.240 0.327 6.1 8.3 0.240 0.327 880 - - - - 7.3 10.3 0.287 0.406 1100 - - - - 9.2 13.0 0.362 0.512 1400 - - - - 11.5 16.0 0.453 0.630 1700 - - - - 14.0 19.0 0.551 0.748 2000 - - - - 17.0 22.5 0.669 0.886 2400 - - - - 20.0 27.0 0.787 1.063 2800 - - - - 24.0 32.0 0.945 1.260 Available in 60mm size only. Available in 32mm and 40mm only. NOTE: Parts available with soldered tabs, to customer specific requirements or standard design. 4-38