Metal-Oxide Varistors (MOVs) High Energy Industrial Disc Varistors > CA Series CA Varistor Series Description The CA Series of transient surge suppressors are industrial high-energy disc varistors (MOVs) intended for special applications requiring unique electrical contact or packaging methods provided by the customer. The electrode finish of these devices is solderable and can also be used with pressure contacts. Discs of the same diameter may be stacked. This series of industrial disc varistors are nominal 60mm diameter, with disc thickness ranging from 2.7mm to 32mm. The voltage range is 250V to 2800 V(AC)RMS. For information on soldering considerations, refer to EC637 "Recommendations for Soldering Terminal Leads to MOV Varistor Discs." Additional Information Features Datasheet Resources Samples • Standard disc size nominal 60mm diameter • High peak pulse current range 50000A to 70000A • Discs have edge passivation insulation • Very high–energy capability Wtm 880J to 10000J Absolute Maximum Ratings • For ratings of individual members of a series, see Device Ratings and Specifications chart Continuous CA Series Units Steady State Applied Voltage: AC Voltage Range (VM(AC)RMS) 250 to 2800 V DC Voltage Range (VM(DC)) 330 to 3500 V 20,000 to 70,000 A Transient: Peak Pulse Current (ITM) For 8/20µs Current Wave(See Figure 2) Single-Pulse Energy Range For 2ms Current Square Wave (WTM) 880 to 10,000 J Operating Ambient Temperature Range (TA) -55 to +85 °C Storage Temperature Range (TSTG) - 55 to +85 °C <0.01 %/°C Temperature Coefficient (V) of Clamping Voltage (VC) at Specified Test Current CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 02/23/15 Metal-Oxide Varistors (MOVs) High Energy Industrial Disc Varistors > CA Series CA Series Ratings & Specifications Maximum Rating (85°C) Continuous Part Number Device Branding Size Specifications (25°C) Transient VRMS VDC Energy (2ms) Peak Current (8/20µs) Varistor Voltage at 1mA DC Test Current Max Clamping Volt Vc at 200A Current (8/20µs) Typical Capacitance VM(AC) VM(DC) WTM ITM Min VNOM Max VC f = 1MHz (mm) (V) (V) (J) (A) (V) (V) (V) (A) (pF) V251CA60 60 250 330 880 50000 351 390 429 620 10000 V271CA60 60 275 369 950 50000 387 430 473 680 9000 V321CA60 60 320 420 1100 50000 459 510 561 760 7500 V421CA60 60 420 560 1500 70000 612 680 748 1060 6000 V481CA60 60 480 640 1600 70000 675 750 825 1160 5500 V511CA60 60 510 675 1800 70000 738 820 902 1300 5000 V571CA60 60 575 730 2100 70000 819 910 1001 1420 4500 V661CA60 60 660 850 2300 70000 945 1050 1155 1640 4000 V751CA60 60 750 970 2600 70000 1080 1200 1320 1880 3500 V881CA60 60 880 1150 3200 70000 1350 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 3800 5000 6000 7500 8800 10000 70000 70000 70000 70000 70000 70000 1665 2070 2500 2970 3510 4230 1850 2300 2700 3300 3900 4700 2035 2530 3030 3630 4290 5170 2940 3600 4300 5200 6200 7400 2200 1800 1500 1200 1000 800 NOTE: Average power dissipation of transients should not exceed 2.5W for CA60 discs. Peak Pulse Current Test Waveform Power Dissipation Ratings PERCENT OF PEAK VALUE PERCENT OF RATED VALUE 100 90 80 70 60 50 40 30 20 10 0 -55 Figure 1 50 60 70 80 90 100 110 120 130 140 150 AMBIENT TEMPERATURE ( oC) FIGURE 1. CURRENT, AND POWER Should transients occur inENERGY rapid succession, theDERATING average power CURVE dissipation result 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 above. 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. 100 90 50 10 O1 T T1 Figure 2 TIME T2 O1 = Virtual Origin of Wave T = Time From 10% to 90% of Peak 0 = Virtual Origin of Wave T 1 1= Virtual Front Time = 1.25 • t T = Time from 10% to 90% of Peak T 2 = Virtual Time to Half Value (Impulse Duration) T1 = Rise Time = 1.25 x T Example: For an 8/20 s Current Waveform: T2 = Decay Time 8 sExample = T 1 = Virtual - For anFront 8/20 Time µs Current Waveform: Time to Half Value 20 s = T8µs 2 = Virtual = T = Rise Time 1 20µs = T2 = Decay Time FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 02/23/15 5 SURGE CURRENT (A) 1 20,000 6 2 10,000 High Energy Industrial Disc Varistors > CA Series 1,000 10 5,000 SURGE CURRENT (A) 900 800 700 600 V321CA32 500 10 4 500 V271CA32 V251CA32 200 400 100 300 V151CA32 V131CA32 50 2 2,000 10 1,000 10 3 500 10 4 DISC SIZE 32mm V421CA32 - V751CA32 50,000 3,000 20,000 1 V751CA40 2 V511CA40 V661CA40 V481CA40 V571CA40 32mm 10,000 DISC SIZE 2,000 V421CA40 - V321CA32 10 5,000 V131CA32 10 5 2,000 10 2 1,000 10 6 900 1,000 10 3 800 700 500 10 4 600 V321CA40 500 V271CA40 200 200 400 300 20,000 10 6 V251CA40 V151CA40 100 50 1 DIS V42 2 10,000 10 5 SURGE CURRENT (A) 2,000 10 Metal-Oxide Varistors (MOVs) 10 DISC SIZE 32mm V131CA32 - V321CA32 50,000 SURGE CURRENT (A) TA = -55o C TO 851o C 20,000 2 10,000 V751CA32 10 5,000 V661CA32 V571CA32 2 V511CA322,000 10 V481CA32 1,000 10 3 V421CA32 MAXIMUM PEAK VOLTS (V) MAXIMUM PEAK VOLTS ( 3,000 5,000 10 10 5 2,000 10 2 10 6 1,000 10 3 500 10 4 200 100 20 INDEFINITE 200 INDEFINITE 50 5 10 -1 10 0 10 1 10 2 10 3 -2 -1 0 1 2 3 4 10 10 10 10 10 10 10 10 10 10 PEAK AMPERES PEAK AMPERES 20 INDEFINITE 20 INDEFINITE 20 100 1,000 10,000 20 100 1,000 10,000 IMPULSE DURATION ( µs) IMPULSE DURATION ( µs) FIGURE 3. CLAMPING VOLTAGE FOR V131CA32 - C751CA32 FIGURE 4. CLAMPING VOLTAGE FOR V131CA40 - V751CA40 10 10 V251CA60 - V881CA60FIGURE 7. SURGE CURRENT RATING CURVES V251CA60 V321CA60 FIGURE 8. SURGE CURRENT 20FOR 100 1,000 10,000 RATING CURVES 20 FOR 100 1,000 IMPULSE DURATION ( µs) V421CA32 - V751CA32 IMPULSE DURATION ( µ V131CA32 - V321CA32 200 10 -3 10 -2 100 10 4 5010 5 20 V131CA40 Maximum Clamping Voltage for 60mm Parts 10 4 10 5 V131CA32 - C751CA32 FIGURE 4. CLAMPING VOLTAGE FOR V131CA40 - V751CA40 FIGURE 9. V112CA60 - V282CA60 100,000 50,000 2 MAX CLAMPING VOLTAGE DISC SIZE 60mm 1100 TO 2800VM(AC) RATING MAX PEAK VOLTS (V) 20,000 10,000 9,000 8,000 7,000 6,000 TA = -55o C TO 85o C V282CA60 5,000 V242CA60 4,000 V202CA60 10 4 10 5 V251CA60 - V881CA60 2,000 10 -2 Figure 5 10 -1 10,000 1 2 10 5,000 10 2 2,000 10 3 1,000 10 4 500 10 5 10 6 10 1 10 2 PEAK AMPERES (A) SURGE CURRENT (A) 10 5,000 10 2 2,000 10 3 1,000 10 4 500 10 5 100 DISC SIZE 60mm V421CA60 - V282CA60 2 10 6 50 100 1,000 IMPULSE DURATION ( µs) 20 10 3 CURRENT RATING CURVES20FOR 10FIGURE 10 411. SURGE 10 5 V421CA60 - V282CA60 Figure FIGURE 6. CLAMPING VOLTAGE FOR V112CA60 - V282CA60 FIGURE 10. SURGE CURRENT RATING CU V251CA60 - V321CA60 200 INDEFINITE 10 20 10 0 SURGE CURRENT (A) 10,000 200 100 V421CA60 - V282CA60 100,000 1 50,000 20,000 20 V112CA60 10 3 FIGURE 8. SURGE CURRENT RATING CU V251CA60 - V321CA60 SURGE CURRENT RATING CURVES FOR V421CA60 - V282CA60 V131CA40 - V751CA40 DISC SIZE 60mm 50 V172CA60 3,000 V142CA60 S (A) 20,000 SURGE CURRENT (A) 30,000 V511CA60 V481CA60 V421CA60 MAX PEAK VOLTS (V) SURGE CURRENT (A) SURGE CURRENT (A) 6,000 6,000 5,000 5,000 4,000 4,000 3,000 3,000 2,000 2,000 SURGE CURRENT (A) 10 3 FIGURE 7. SURGE CURRENT RATING CURVES FOR 50,000 1 MAX CLAMPING VOLTAGE 2 MAXIMUM VOLTAGE DISC 20,000 SIZECLAMPING 60mm DISC SIZE 40mm RATING 250 TO 880VM(AC) 10 RATING 130 TO 750 VM(AC) 10,000 o o TA = -55 C TO 85 C 5,000 10 2 V751CA40 V511CA40 V661CA40 V481CA40 V881CA602,000 V571CA40 10 3 V751CA60 V421CA40 V661CA601,000 50,000 30,000 1 DISC SIZE 40mmV131CA32 - V321CA32 MAX CLAMPING VOLTAGE DISC SIZE 60mmV421CA32 - V751CA32 TA = -55o CV131CA40 TO 85o C - V751CA40 V511CA60 DISC20,000 SIZE 60mm V251CA60 - V321CA60 2 50,000 1 10 V481CA60 50,000 1100 TO 2800VM(AC) RATING V421CA60 10,000 1 20,000 DISC SIZE 40mm DIS o o 2 TA = -55 C TOV131CA40 85 C 10 4 - V751CA40 V25 20,000 20,000 2 5 2 10 10 10 5,000 10 10,000 10,000 4 10 2,000 10 3 5,000 10 5 10,000 10 2 5,000 10 2 9,000 1,000 10 4 V571CA60 3 8,000 2,000 2,000 3 10 1,000 500 10 500 7,000 900 10 5 1,000 1,000 1,000 6,000 4 800 10 900 V282CA60 700 200 800 5,000 V242CA60 200 500 500 600 V321CA60 700 10 5 6 V271CA60 100 10 6 500 V321CA40 600 4,000 V202CA60 100 10 V251CA60 V271CA40 200 200 500 400 50 V172CA60 50 V251CA40 3,000 V142CA60 100 10 6 100 10 6 400 300 INDEFINITE INDEFINITE 20 V151CA40 V112CA60 20 50 50 300 10 10 200 INDEFINITE INDEFINITE 20 0 100 1,000 10,000 2,000 -2 -2 10,000 10 -1 10 10 1 10 2 10 3 10 4 2010 5 10V131CA40 10 10 -1 20 10 0 10 1100 10 2 10 3 1,000 10 4 10 5 20 200 IMPULSE ( µµ s) IMPULSE PEAK AMPERES (A) DURATION ( µs) 10 PEAK AMPERES (A) DURATION -2 -1 0 1 2 3 4 5 Figure 4 10 10 10 10 10 10 10 10 Figure 3 10 20 100 1,000 10,000 1,000 100 FIGURE 9. SURGE CURRENT RATING CURVES FOR FIGURE 10. SURGE CURRENT RATING CURVES20FOR PEAK AMPERES FIGURE 5. CLAMPING VOLTAGE FOR V251CA60 - V881CA60 FIGURE 6. CLAMPING FOR V112CA60 - V282CA60 IMPULSE DURATION (VOLTAGE µµ s) IMPULSE DURATION ( µ V131CA40 - V751CA40 MAXIMUM PEAK VOLTS MAXIMUM PEAK VOLTS (V)(V) 10 2 ES Repetitive Surge Capability for 60mm Parts 6 10,000 INDEFINITE 100 1,000 IMPULSE DURATION ( µs) 10,000 FIGURE 11. 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. © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 02/23/15 Metal-Oxide Varistors (MOVs) High Energy Industrial Disc Varistors > CA Series Physical Specifications Environmental Specifications Soldering Characteristics Solderability per MIL–STD–202, Method 208 Insulating Material glass passivation on edge only Device Labeling none Operating/Storage Temperature -55°C to +85°C Humidity Aging +85°C, 85% RH, 1000 hours +/-10% typical voltage change Thermal Shock +85°C to -55°C 10 times +/-10% typical voltage change Solvent Resistance MIL–STD–202, Method 215 Moisture Sensitivity Level 1, J–STD–020 Product Dimensions (mm) ELECTRODE OPTIONAL PASSIVATION COLLAR 2.5 mm 0.1 inch Weight ELECTRODE DIAMETER (SEE TABLE) Model Size 60 Model VRMS VM(AC) 250 THICKNESS Disc Diameter Millimeters Inches Min Max Min Max 58.0 62.0 2.283 2.441 Disc Thickness Millmeters Inches Model Number Typical Discweight (Grams) V251CA60 39 V271CA60 42 V321CA60 50 V421CA60 66 V481CA60 71 V511CA60 80 V571CA60 88 V661CA60 101 V751CA60 116 V881CA60 141 V112CA60 178 Min. Max. Min. Max. V142CA60 220 2.0 2.7 0.079 0.106 V172CA60 265 317 275 2.2 3.0 0.087 0.118 V202CA60 320 2.6 3.5 0.102 0.138 V242CA60 377 V282CA60 450 420 3.5 4.7 0.138 0.185 510 4.2 5.7 0.165 0.224 575 4.6 6.3 0.181 0.248 660 5.3 7.2 0.209 0.283 750 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 © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 02/23/15 Metal-Oxide Varistors (MOVs) High Energy Industrial Disc Varistors > CA Series Passivation Layer Electrode Metallization The standard CA Series is supplied with passivation layer around the outside perimeter of the disc forming an electrical insulator as detailed in the dimensional drawing. For other options contact factory. (See Ordering Information) CA60 discs are supplied as standard with sintered Silver electrodes. For other available options please contact Littelfuse. Recommended Reflow Temperature Profile TYPICAL BELT OVEN TEMPERATURE PROFILE Encapsulated Recommendations 250 Stacking and Contact Pressure Recommendations When applications require the stacking of CA60 discs, or when an electrical connection is made by pressure contacts, the pressure applied to the CA60 disc electrode surface should be minimum 2.2kgs (5 pounds) and maximum 4N/CM2 (5.7LBs/IN2). Part Numbering System 200 TEMPERATURE ( oC) After lead attachment, the disc/lead assembly may be coated or encapsulated in a package to provide electrical insulation and isolation from environmental contamination as required by the application. Coating/Filler materials for containers may include silicones, polyurethanes, and some epoxy resins. Materials containing halogens, sulfides, or alkalines are not recommended. 150 100 50 0 0 100 200 300 400 500 600 700 800 900 TIME (SEC) Packaging and Shipping V 25 1 CA 60 VARISTOR DESIGNATOR MAX AC RMS WORKING VOLTAGE (FIRST SIGNIFICANT DIGITS) V M(AC) VM(AC) VOLTAGE DECADE MULTIPLIER SERIES DESIGNATOR DISC SIZE (mm) DIAMETER © 2015 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 02/23/15 The CA Series is supplied in bulk for shipment. Discs are packaged in compartmentalized cartons to protect from scratching or edge-chipping during shipment. No branding or any other type of marking appears on the CA disc itself. CA60 discs are supplied as standard with sintered Silver electrodes and glass passivation. For other available options please contact factory.