Varistor Products 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 2.0mm minimum to 32mm maximum. 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." Features t 4UBOEBSEEJTDTJ[F nominal 60mm diameter t )JHIQFBLQVMTF current range 50000A to 70000A t %JTDTIBWFFEHF passivation insulation t 7FSZIJHIoFOFSHZ capability Wtm 880J to 10000J Absolute Maximum Ratings t'PSSBUJOHTPGJOEJWJEVBMNFNCFSTPGBTFSJFTTFF%FWJDF3BUJOHTBOE4QFDJmDBUJPOTDIBSU Continuous CA Series Units 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 HI–ENERGY CAMOV’S Series Steady State Applied Voltage: Transient: Peak Pulse Current (ITM) For 8/20μs Current Wave(See Figure 2) Single-Pulse Energy Range 880 to 10,000 J Operating Ambient Temperature Range (TA) For 2ms Current Square Wave (WTM) -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. ©2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/ca.html for current information. 177 Revision: September 3, 2009 CA Varistor Series Varistor Products 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) VM(AC) VM(DC) WTM ITM Varistor Voltage at 1mA DC Test Current Min VNOM Max Clamping Volt Vc at 200A Current (8/20μs) Typical Capacitance VC f = 1MHz Max (mm) (V) (V) (J) (A) (V) (V) (V) (A) (pF) V251CA60 60 250 330 880 50000 354 390 429 620 10000 V271CA60 60 275 369 950 50000 389 430 473 680 9000 V321CA60 60 320 420 1100 50000 462 510 561 760 7500 V421CA60 60 420 560 1500 70000 610 680 748 1060 6000 V481CA60 60 480 640 1600 70000 670 750 825 1160 5500 V511CA60 60 510 675 1800 70000 735 820 910 1300 5000 V571CA60 60 575 730 2100 70000 805 910 1000 1420 4500 V661CA60 60 660 850 2300 70000 940 1050 1160 1640 4000 V751CA60 60 750 970 2600 70000 1080 1200 1320 1880 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 3800 5000 6000 7500 8800 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 should not exceed 2.5W for CA60 discs. Peak Pulse Current Test Waveform Power Dissipation Ratings 100 PERCENT OF RATED VALUE 100 90 90 80 70 60 50 50 40 30 20 10 10 0 -55 Figure 1 50 60 70 80 90 O1 100 110 120 130 140 150 AMBIENT TEMPERATURE ( oC) Figure 2 Should transients occur in rapid succession, the average power 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. CA Varistor Series T T1 TIME T2 01 = Virtual Origin of Wave T = Time from 10% to 90% of Peak T1 = Rise Time = 1.25 x T T2 = Decay Time Example - For an 8/20 μs Current Waveform: 8μs = T1 = Rise Time 20μs = T2 = Decay Time 178 Revision: September 3, 2009 ©2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/ca.html for current information. Varistor Products High Energy Industrial Disc Varistors > CA Series Maximum Clamping Voltage for 60mm Parts Repetitive Surge Capability for 60mm Parts V251CA60 - V881CA60 MAX CLAMPING VOLTAGE DISC SIZE 60mm 250 TO 880VM(AC) RATING TA = -55o C TO 85o C 2,000 1,000 900 800 700 600 V321CA60 500 V271CA60 V251CA60 5,000 10 2 2,000 10 3 1,000 10 4 500 100 10 6 50 300 200 10 -2 10 -1 10 0 Figure 3 10 1 10 2 PEAK AMPERES (A) 10 3 10 4 20 10 20 10 5 INDEFINITE MAX CLAMPING VOLTAGE DISC SIZE 60mm 1100 TO 2800VM(AC) RATING 20,000 50,000 20,000 SURGE CURRENT (A) TA = -55o C TO 85o C V282CA60 5,000 V242CA60 4,000 V202CA60 10,000 DISC SIZE 60mm V421CA60 - V282CA60 1 10 5,000 10 2 2,000 10 3 1,000 10 4 500 10 5 2 200 100 20 V112CA60 10 -1 10,000 10 6 50 V172CA60 3,000 V142CA60 2,000 10 -2 1,000 IMPULSE DURATION ( μs) V421CA60 - V282CA60 100,000 30,000 100 Figure 4 V112CA60 - V282CA60 MAX PEAK VOLTS (V) 10 5 200 400 Figure 5 DISC SIZE 60mm V251CA60 - V321CA60 2 10 10,000 V881CA60 V751CA60 V661CA60 V571CA60 10,000 9,000 8,000 7,000 6,000 1 20,000 10 0 10 1 10 2 PEAK AMPERES (A) 10 3 10 4 10 20 10 5 Figure 6 INDEFINITE 100 1,000 IMPULSE DURATION ( μs) 10,000 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. ©2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/ca.html for current information. 179 Revision: September 3, 2009 CA Varistor Series HI–ENERGY CAMOV’S Series 3,000 50,000 V511CA60 V481CA60 V421CA60 SURGE CURRENT (A) MAXIMUM PEAK VOLTS (V) 6,000 5,000 4,000 V251CA60 - V321CA60 Varistor Products High Energy Industrial Disc Varistors > CA Series Physical Specifications Environmental Specifications Soldering Characteristics 4PMEFSBCJMJUZQFS.*-o45%o Method 208E Operating/Storage Temperature -55°C to +85°C Insulating Material glass passivation on edge only Humidity Aging ¡$3)IPVST +/-10% typical voltage change Device Labeling none Thermal Shock +85°C to -55°C 10 times +/-10% typical voltage change Solvent Resistance .*-o45%o.FUIPE' Moisture Sensitivity -FWFM+o45%o$ Product Dimensions (mm) ELECTRODE OPTIONAL PASSIVATION COLLAR 2.5 mm 0.1 inch Weight ELECTRODE DIAMETER (SEE TABLE) THICKNESS Disc Diameter Model Size 60 Model VRMS VM(AC) Millimeters Inches Min Max Min Max 58.0 62.0 2.283 2.441 Disc Thickness Millmeters Inches Min. Max. Min. Max. 250 2.0 2.7 0.079 0.106 275 2.2 3.0 0.087 0.118 320 2.6 3.5 0.102 0.138 420 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 CA Varistor Series 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 V142CA60 220 V172CA60 265 V202CA60 317 V242CA60 377 V282CA60 450 180 Revision: September 3, 2009 ©2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/ca.html for current information. Varistor Products 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 Encapsulated Recommendations 250 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. TEMPERATURE ( oC) 200 150 100 50 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). 0 0 100 200 300 400 500 600 700 800 900 TIME (SEC) Part Numbering System Packaging and Shipping V 25 1 CA 60 The CA Series is supplied in bulk for shipment. Discs are QBDLBHFEJODPNQBSUNFOUBMJ[FEDBSUPOTUPQSPUFDUGSPN scratching or edge-chipping during shipment. VARISTOR DESIGNATOR MAX AC RMS WORKING VOLTAGE (FIRST SIGNIFICANT DIGITS) V M(AC) VM(AC) VOLTAGE DECADE MULTIPLIER CA60 discs are supplied as standard with sintered Silver electrodes and glass passivation. For other available options please contact factory. SERIES DESIGNATOR DISC SIZE (mm) DIAMETER ©2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/ca.html for current information. 181 Revision: September 3, 2009 CA Varistor Series HI–ENERGY CAMOV’S Series No branding or any other type of marking appears on the CA disc itself.