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| Datasheet File OCR Text: |
| Varistor Products High Energy Industrial DA/DB Varistor Series The DA and DB Series transient surge suppressors are heavy-duty industrial metal-oxide varistors 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 flexibility in equipment designs. DA series devices feature rigid terminals to insure 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. See DA/DB Series Device Ratings and Specifications table for part number and brand information. (R) DA SERIES Features * 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 DB SERIES AGENCY APPROVALS: Recognized under the components program of Underwriters Laboratories. AGENCY FILE NUMBERS: UL E75961. 86 w w w. l i t t e l f u s e . c o m Varistor Products High Energy Industrial DA/DB Varistor Series Absolute Maximum Ratings For ratings of individual members of a series, see Device Ratings and Specifications chart Continuous: DA/DB SERIES Steady State Applied Voltage: AC Voltage Range (VM(AC)RMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 to 750 DC Voltage Range (VM(DC)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175 to 970 Transient: Peak Pulse Current (ITM) For 8/20s Current Wave (See Figure 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40,000 Single Pulse Energy Range For 2ms Current Square Wave (WTM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 270 to 1050 Operating Ambient Temperature Range (TA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 85 Storage Temperature Range (TSTG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 125 Temperature Coefficient (V) of Clamping Voltage (VC) at Specified Test Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <0.01 Hi-Pot Encapsulation (Isolation Voltage Capability) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5000 (Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301) UNITS V V 2 A J C o C %/oC V o Insulation Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000 M 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. Device Ratings and Specifications MAXIMUM RATINGS (85 oC) CONTINUOUS TRANSIENT PEAK CURRENT (8/20s) ITM (A) 40000 40000 40000 40000 40000 40000 40000 40000 40000 40000 40000 1 2 SPECIFICATIONS (25 oC) MAX CLAMPING VOLT V C AT 200A CURRENT (8/20s) VC (V) 345 405 650 730 830 1130 1240 1350 1480 1720 2000 PART NUMBER AND DEVICE BRANDING DA V131DA40 V151DA40 V251DA40 V271DA40 V321DA40 V421DA40 V481DA40 V511DA40 V571DA40 V661DA40 V751DA40 DB V131DB40 V151DB40 V251DB40 V271DB40 V321DB40 V421DB40 V481DB40 V511DB40 V571DB40 V661DB40 V751DB40 VRMS VM(AC) (V) 130 150 250 275 320 420 480 510 575 660 750 VDC VM(DC) (V) 175 200 330 369 420 560 640 675 730 850 970 ENERGY (2ms) WTM (J) 270 300 370 400 460 600 650 700 770 900 1050 VARISTOR VOLTAGE AT 1mA DC TEST CURRENT MIN (V) 184 212 354 389 462 610 670 735 805 940 1080 VN(DC) (V) 200 240 390 430 510 680 750 820 910 1050 1200 MAX (V) 228 268 429 473 561 748 825 910 1000 1160 1320 TYPICAL CAPACITANCE f = 1MHz (pF) 10000 8000 5000 4500 3800 3000 2700 2500 2200 2000 1800 NOTE: Average power dissipation of transients not to exceed 2.0W. 1: Peak current applies to applications rated up to 115VRMS . Peak Current is 30kA for applications greater than 115VRMS . 2: Peak current applies to applications rated up to 132VRMS . Peak Current is 30kA for applications greater than 132VRMS . w w w. l i t t e l f u s e . c o m 87 VARISTOR PRODUCTS Varistor Products High Energy Industrial DA/DB Varistor Series Power Dissipation Ratings PERCENT OF RATED VALUE 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 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. 100 90 80 70 60 50 40 30 20 10 0 -55 50 60 70 80 90 100 110 120 130 140 150 AMBIENT TEMPERATURE ( oC) FIGURE 1. CURRENT, ENERGY AND POWER DERATING CURVE PERCENT OF PEAK VALUE 100 90 50 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) Example: For an 8/20s Current Waveform: 8s = T1 = Virtual Front Time 20s = T2 = Virtual Time to Half Value 10 O1 T T1 T2 TIME FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM Transient V-I Characteristics Curve 6,000 5,000 4,000 MAXIMUM PEAK VOLTS (V) 3,000 2,000 TA = -55oC to 85oC MAXIMUM CLAMPING VOLTAGE DISC SIZE 40mm V751DA/DB40 130 TO 750 VM(AC) RATING V661DA/DB40 V571DA/DB40 V511DA/DB40 V481DA/DB40 V421DA/DB40 1,000 900 800 700 600 500 400 300 V151DA/DB40 V131DA/DB40 200 -2 10 10-1 100 V321DA/DB40 V271DA/DB40 V251DA/DB40 101 102 103 PEAK AMPERES (A) 104 105 FIGURE 3. CLAMPING VOLTAGE FOR V131DA40, V131DB40 - V751DA40, V751DB40 88 w w w. l i t t e l f u s e . c o m Varistor Products High Energy Industrial DA/DB Varistor Series Pulse Rating Curves 50,000 20,000 10,000 SURGE CURRENT (A) 5,000 2,000 1,000 500 200 100 50 20 10 20 INDEFINITE 100 1,000 IMPULSE DURA TION ( s) 10,000 102 103 1 2 10 DISC SIZE 40mm V131DA40 - V751DA40 V131DB40 - V751DB40 104 5 10 6 10 2 VARISTOR PRODUCTS FIGURE 5. SURGE CURRENT RATING CURVES FOR V131DA40, V131DB40 - V751DA40, V751DB40 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. Mechanical Dimensions DA SERIES "A"DIMENSION: FILISTER HEAD SCREW - 51mm (2.01) PAN HEAD SCREW - 53mm (2.09) A 4.3mm (0.170) 60.3 (2.37) 44.45 0.75 (1.75 0.03) DB SERIES ALL DIMENSIONS ARE MAXIMUM EXCEPT WHERE NOTED 15mm (0.59) 46.8 (1.84) 23mm 1mm (0.90 0.04) M4 INTERNATIONAL THREAD HOLES 0.23 THRU BORE 0.370 x 0.370 DP 40.5 (1.6) 12.7 (0.50) 12.7 (0.50) 2 HOLES 6.60 (0.26) 23 (0.90) 41 (1.61) 6.60 (0.26) 25.4 0.75 (1.00 0.03) 67mm (2.64) 57mm (2.24) 1.6 (0.06) 62mm (2.44) 4.5mm (0.18) Dimensions in millimeters and (inches). w w w. l i t t e l f u s e . c o m 89 |
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