Varistor Products Industrial High Energy Terminal Varistors > DA/DB Series DA/DB Varistor Series RoHS Description DA SERIES The DA and DB Series transient surge suppressors are heavy-duty industrial Metal-Oxide Varistors (MOVs) designed to provide surge protection for motor controls and power supplies used in oildrilling, mining, and transportation equipment. These UL recognized varistors have identical ratings and specifications but differ in case construction to provide flexibility in equipment designs. DB SERIES DA Series devices feature rigid terminals to ensure secure wire contacts. Both the DA and DB Series feature improved creep and strike distance capability to minimize breakdown along the package surface design that provides complete electrical isolation of the disc subassembly. Agency Approvals Agency Agency File Number See DA/DB Series Device Ratings and Specifications table for part number and brand information. E320116 • RoHS compliant and Lead–free • High energy absorption capability WTM up to 1050J • Wide operating voltage range VM(AC)RMS 130V to 750V • Screw terminals (DA Series),quick connect push-on connectors (DB Series) • Case design provides complete electrical isolation of disc subassembly • 40mm diameter disc • No derating up to 85ºC ambient Absolute Maximum Ratings • For ratings of individual members of a series, see Device Ratings and Specifications chart Continuous DA/DB Series Units AC Voltage Range (VM(AC)RMS) 130 to 750 V DC Voltage Range (VM(DC)) 175 to 970 V 40,000 A Steady State Applied Voltage: Transients: Peak Pulse Current (ITM) For 8/20μs Current Wave (See Figure 2) Single Pulse Energy Range 270 to 1050 J Operating Ambient Temperature Range (TA) For 2ms Current Squarewave (WTM) -55 to +85 ºC Storage Temperature Range (TSTG) -55 to +125 ºC <0.01 %/ºC Temperature Coefficient (aV) of Clamping Voltage (VC) at Specified Test Current Hi-Pot Encapsulation (COATING Isolation Voltage Capability) (Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301) COATING Insulation Resistance 5000 V 1000 MΩ 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/da or /db.html for current information. DA/DB Varistor Series Revision: October 29, 2009 HI–ENERGY DA/DBMOV’S Series Features Varistor Products Industrial High Energy Terminal Varistors > DA/DB Series DA/DB Series Ratings & Specifications Maximum Rating (85ºC) Continuous Part Number Device Branding Specifications (25ºC) Transient VRMS VDC Energy (2ms) Peak Current 8 x 20μs VM(AC) VM(DC) WTM ITM Varistor Voltage at 1mA DC Test Current Min VNOM Maximum Clamping Volt VC at 200A Current (8/20μs) Typical Capacitance f = 1MHz VC C Max DA DB (V) (V) (J) (A) (V) (V) (V) (A) (pF) V131DA40 V131DB40 130 175 270 400001 184 200 228 345 10000 V151DA40 V151DB40 150 200 300 400002 212 240 268 405 8000 V251DA40 V251DB40 250 330 370 40000 354 390 429 650 5000 V271DA40 V271DB40 275 369 400 40000 389 430 473 730 4500 V321DA40 V321DB40 320 420 460 40000 462 510 561 830 3800 V421DA40 V421DB40 420 560 600 40000 610 680 748 1130 3000 V481DA40 V481DB40 480 640 650 40000 670 750 825 1240 2700 V511DA40 V511DB40 510 675 700 40000 735 820 910 1350 2500 V571DA40 V571DB40 575 730 770 40000 805 910 1000 1480 2200 V661DA40 V661DB40 660 850 900 40000 940 1050 1160 1720 2000 V751DA40 V751DB40 750 970 1050 40000 1080 1200 1320 2000 1800 Note : Average power dissipation of transients not to exceed 2.0W. Power Dissipation Ratings PERCENT OF PEAK VALUE Peak Pulse Current Test Waveform PERCENT OF RATED VALUE 100 90 80 70 60 50 40 30 20 10 0 -55 100 90 50 10 O1 50 Figure 1 60 70 80 90 100 110 120 130 140 T T1 15 AMBIENT TEMPERATURE ( oC) Figure 2 NOTES: 1. Peak current Applies to applications rated up to 115VRMS. Peak current is 30kA for applications greater than 115V. 2. Peak current applies to applications rated up to 132VRMS. Peak Current is 30kA for applications greater than 132V. Should transients occur in rapid succession, 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 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. 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 ©2009 Littelfuse, Inc. DA/DB Varistor Series Revision: October 29, 2009 Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/da or /db.html for current information. Varistor Products Industrial High Energy Terminal Varistors > DA/DB Series Repetitive Surge Capability Maximum Clamping Voltage V131DA40 - V751DA40 and V131DB40 - V751DB40 3,000 2,000 1,000 900 800 700 600 500 400 300 50,000 TA = -55o C to 85 o C MAXIMUM CLAMPING VOLTAGE DISC SIZE 40mm V751DA/DB40 130 TO 750 VM(AC) RATING V661DA/DB40 V571DA/DB40 V511DA/DB40 V421DA/DB40 V131DA/DB40 200 10 -1 10 0 10 -2 Figure 3 10 3 10 4 DISC SIZE 40mm V131DA40 - V751DA40 V131DB40 - V751DB40 10 5,000 10 2 2,000 10 3 1,000 10 4 5 10 6 10 500 200 100 50 V321DA/DB40 V271DA/DB40 V251DA/DB40 10 1 10 2 PEAK AMPERES (A) 2 10,000 V481DA/DB40 V151DA/DB40 1 20,000 SURGE CURRENT (A) MAXIMUM PEAK VOLTS (V) 6,000 5,000 4,000 V131DA40 - V751DA40 and V131DB40 - V751DB40 INDEFINITE 20 10 10 5 20 Figure 4 100 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 it does not prevent the device from continuing to function, and to provide ample protection. Physical Specifications Lead Material DA - Copper, Tin–plated DB - Brass, Tin–plated Operating/Storage Temperature -55°C to +85°C/ -55°C to +125°C Insulating Material Cured, flame retardant epoxy polymer meets UL94V–0 requirements. Humidity Aging Device Labeling Marked with LF, part number and date code +85°C, 85% RH, 1000 hours +/- 5% typical resistance change Thermal Shock +85°C to -40°C 10 times +/- 5% typical resistance change Solvent Resistance MIL–STD–202, Method 215F Moisture Sensitivity Level 1, J–STD–020C ©2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/da or /db.html for current information. DA/DB Varistor Series Revision: October 29, 2009 HI–ENERGY DA/DBMOV’S Series Environmental Specifications Varistor Products Industrial High Energy Terminal Varistors > DA/DB Series Product Dimensions (mm) DA SERIES DB SERIES 60.3 (2.37) “A” DIMENSION: FILISTER HEAD SCREW - 51mm (2.01) PAN HEAD SCREW - 53mm (2.09) ALL DIMENSIONS ARE MAXIMUM EXCEPT WHERE NOTED 44.45 0.75 (1.75 0.03) A 4.3mm (0.170) 15mm (0.59) 25.4 (1.00 46.8 (1.84) 23mm 1mm (0.90 0.04) 0.75 0.03) M4 INTERNATIONAL THREAD HOLES 0.23 THRU BORE 0.370 x 0.370 DP 1.6 (0.06) 67mm (2.64) 40.5 (1.6) 12.7 (0.50) 2 HOLES 6.60 (0.26) 57mm (2.24) 23 (0.90) 62mm (2.44) 12.7 (0.50) 6.60 (0.26) 41 (1.61) 4.5mm (0.18) Dimensions in millimeters and (inches). Part Numbering System V XX X DA 40 VARISTOR DISC SIZE (60mm) VM(AC) SERIES DESIGNATOR First Two Significant Digits* DA or DB VM(AC) Decade Multiplier* *Refer to Rating & Specifications table Example: 130 VM(AC) = 131 ©2009 Littelfuse, Inc. DA/DB Varistor Series Revision: October 29, 2009 Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/da or /db.html for current information.