Metal-Oxide Varistors (MOVs) Industrial High Energy Terminal Varistors > DA/DB Series RoHS DA/DB Varistor Series 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 oil- drilling, mining, and transportation equipment. These UL recognized varistors have identical ratings and specifications but differ in case construction to provide exibility 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 Agency Approvals breakdown along the package surface design that provides complete electrical isolation of the disc subassembly. Agency Agency Approval Agency File Number See DA/DB Series Device Ratings and Specifications UL1449 E320116 table for part number and brand information. Features Additional Information High energy Case design provides absorption capability complete electrical isolation of disc W up to 1050J TM subassembly Wide operating Datasheet Resources Samples 40mm diameter disc DA DA DA voltage range No derating up to V 130V to 750V M(AC)RMS 85C ambient Screw terminals (DA RoHS compliant Series),quick connect push-on connectors Datasheet Resources Samples DB DB DB (DB Series) Absolute Maximum Ratings For ratings of individual members of a series, see Device Ratings and Specifications chart Continuous DA/DB Series Units Steady State Applied Voltage: AC Voltage Range (V ) 130 to 750 V M(AC)RMS DC Voltage Range (V ) 175 to 970 V M(DC) Transients: Peak Pulse Current (I ) TM For 8/20s Current Wave (See Figure 2) 40,000 A Single Pulse Energy Range For 2ms Current Squarewave (W ) 270 to 1050 J TM Operating Ambient Temperature Range (T ) -55 to +85 C A Storage Temperature Range (T ) -55 to +125 C STG V Temperature Coefficient (a ) of Clamping Voltage (V ) at Specified Test Current <0.01 %/C C Hi-Pot Encapsulation (COATING Isolation Voltage Capability) 5000 V (Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301) COATING Insulation Resistance 1000 M CAUTION: Stresses above those listed inAbsolute Maximum Rating 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. 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/14/17Metal-Oxide Varistors (MOVs) Industrial High Energy Terminal Varistors > DA/DB Series DA/DB Series Ratings & Specifications Maximum Rating (85C) Specifications (25C) Maximum Continuous Transient Typical Clamping Part Number Varistor Voltage at 1mA Capaci- Peak Volt V at Energy C Device Branding DC Test Current tance f = V V Current 200A Current RMS DC (2ms) 1MHz 8 x 20s (8/20s) V V W I Min V Max V C M(AC) M(DC) TM TM NOM C DA DB (V) (V) (J) (A) (V) (V) (V) (A) (pF) 1 V131DA40 V131DB40 130 175 270 40000 184.5 205 225.5 345 10000 2 V151DA40 V151DB40 150 200 300 40000 216 240 264 405 8000 V251DA40 V251DB40 250 330 370 40000 351 390 429 650 5000 V271DA40 V271DB40 275 369 400 40000 387 430 473 730 4500 V321DA40 V321DB40 320 420 460 40000 459 510 561 830 3800 V421DA40 V421DB40 420 560 600 40000 612 680 748 1130 3000 V481DA40 V481DB40 480 640 650 40000 675 750 825 1240 2700 V511DA40 V511DB40 510 675 700 40000 738 820 902 1350 2500 V571DA40 V571DB40 575 730 770 40000 819 910 1001 1480 2200 V661DA40 V661DB40 660 850 900 40000 945 1050 1155 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 Peak Pulse Current Test Waveform 100 100 O = Virtual Origin of Wave 1 90 90 T = Time From 10% to 90% of Peak 80 T = Virtual Front time = 1.25 t 1 70 T = Virtual Time to Half Value (Impulse Duration) 2 60 50 Example: For an 8/20 s Current Waveform: 50 8s = T = Virtual Front Time 1 40 20 s = T = Virtual Time to Half Value 2 30 20 10 10 O T TIME 1 0 -55 50 60 70 80 90 100110 120130 140150 T 1 o Figure 1 AMBIENT TEMPERATURE ( C) T 2 Figure 2 NOTES: FIGURE 1. CURRENT, ENERGY AND POWER DERATING 1. Peak current Applies to applications rated up to 115VRMS. Peak CURVE FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM current is 30kA for applications greater than 115V. 0 = Virtual Origin of Wave 2. Peak current applies to applications rated up to 132VRMS. Peak 1 Current is 30kA for applications greater than 132V. T = Time from 10% to 90% of Peak T = Rise Time = 1.25 x T 1 Should transients occur in rapid succession, the T = Decay Time 2 average power dissipation required is simply the energy Example - For an 8/20 s Current Waveform: (watt- seconds) per pulse times the number of pulses 8s = T = Rise Time 1 per second. The power so developed must be within 20s = T = Decay Time 2 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. 2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 09/14/17 PERCENT OF RATED VALUE PERCENT OF PEAK VALUE