Next Previous Varistor Products High Energy Industrial BA/BB Varistor Series ® The BA and BB 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, transportation equipment and other heavy industrial AC line applications. These UL-recognized varistors have similar package construction but differ in size and ratings.The BA models are rated from 130 to 880VM(AC) . The BB models from 1100 to 2800VM(AC) . Both the BA and BB Series feature improved creep and strike capability to minimize breakdown along the package surface, a package design that provides complete electrical isolation of the disc subassembly, and rigid terminals to insure secure wire contacts. See BA/BB Series Device Ratings and Specifications table for part number and brand information. Features BB SERIES • High Energy Absorption Capability WTM BA Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3200J BB Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10,000J • Wide Operating Voltage Range VM(AC)RMS BA Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .130V to 880V BB Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1100V to 2800V • Rigid Terminals for Secure Wire Contact • Case Design Provides Complete Electrical Isolation of Disc Subassembly • Littelfuse Largest Packaged Disc . . . . . . . . . . . . . . .60mm Diameter • No Derating Up to 85oC Ambient AGENCY APPROVALS: Recognized under the components program of Underwriters Laboratories (BA Series only). AGENCY FILE NUMBERS: UL E75961. 72 BA SERIES w w w. l i t t e l f u s e . c o m Next Previous Varistor Products High Energy Industrial BA/BB Varistor Series For ratings of individual members of a series, see Device Ratings and Specifications chart BA SERIES BB SERIES Continuous: Steady State Applied Voltage: AC Voltage Range (VM(AC)RMS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 to 880 1100 to 2800 DC Voltage Range (VM(DC)). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175 to 1150 1400 to 3500 Transient: Peak Pulse Current (ITM) For 8/20µs Current Wave (See Figure 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50,000 to 70,000 70,000 Single Pulse Energy Range For 2ms Current Squarewave (WTM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 450 to 3200 3800 to 10,000 Operating Ambient Temperature Range (TA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 85 -55 to 85 Storage Temperature Range (TSTG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 125 -55 to 125 Temperature Coefficient (αV) of Clamping Voltage (VC) at Specified Test Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <0.01 <0.01 Hi-Pot Encapsulation (Isolation Voltage Capability) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5000 5000 (Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301) Insulation Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000 1000 UNITS V V A J C 0 C 0 %/0C V 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. Device Ratings and Specifications MAXIMUM RATINGS (85 oC) CONTINUOUS PART NUMBER AND DEVICE BRANDING SPECIFICATIONS (25 oC) TRANSIENT VRMS VDC ENERGY (2ms) VM(AC) VM(DC) WTM PEAK CURRENT (8/20µs) ITM VARISTOR VOLTAGE AT 1mA DC TEST CURRENT MIN VN(DC) MAX MAX CLAMPING VOLT V C AT 200A CURRENT (8/20µs) TYPICAL CAPACITANCE VC f = 1MHz (V) (V) (J) (A) (V) (V) (V) (V) (pF) V131BA60 130 175 450 50000 184 200 228 340 20000 V151BA60 150 200 530 50000 212 240 268 400 16000 V251BA60 250 330 880 50000 354 390 429 620 10000 V271BA60 275 369 950 50000 389 430 473 680 9000 V321BA60 320 420 1100 50000 462 510 561 760 7500 V421BA60 420 560 1500 70000 610 680 748 1060 6000 V481BA60 480 640 1600 70000 670 750 825 1160 5500 V511BA60 510 675 1800 70000 735 820 910 1300 5000 V571BA60 575 730 2100 70000 805 910 1000 1420 4500 V661BA60 660 850 2300 70000 940 1050 1160 1640 4000 V751BA60 750 970 2600 70000 1080 1200 1320 1880 3500 V881BA60 880 1150 3200 70000 1290 1500 1650 2340 2700 V112BB60 1100 1400 3800 70000 1620 1800 2060 2940 2200 V142BB60 1400 1750 5000 70000 2020 2200 2550 3600 1800 V172BB60 1700 2150 6000 70000 2500 2700 3030 4300 1500 V202BB60 2000 2500 7500 70000 2970 3300 3630 5200 1200 V242BB60 2400 3000 8600 70000 3510 3900 4290 6200 1000 V282BB60 2800 3500 10000 70000 4230 4700 5170 7400 800 NOTE: Average power dissipation of transients not to exceed 2.5W. See Figures 3 and 4 for more information on power dissipation. w w w. l i t t e l f u s e . c o m 73 2 VARISTOR PRODUCTS Absolute Maximum Ratings Next Previous Varistor Products High Energy Industrial BA/BB Varistor Series Power Dissipation Ratings 100 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 Characteristics 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. 90 80 70 60 50 40 30 20 10 0 -55 50 60 70 80 90 100 110 120 130 140 150 PERCENT OF PEAK VALUE AMBIENT TEMPERATURE ( oC) 100 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) 90 50 Example: For an 8/20µs Current Waveform: 8µs = T1 = Virtual Front Time 20µs = T2 = Virtual Time to Half Value 10 O1 T TIME T1 T2 FIGURE 2. PEAK PULSE CURRENT TEST WAVEFORM Typical Performance Curves TYPICAL TEMPERATURE COEFFICIENT OF POWER DISSIPATION = 2.2%/ oC 0.5 MAX AT TA = 85oC POWER DISSIPATION (W) PER kV OF RATED V RMS POWER DISSIPATION (W) PER kV OF RATED V RMS 1.0 0.8 1,000 HOURS, TA = 85oC 0.6 0.4 0.2 MAX AT TA = 25oC 0.1 0.08 TYP AT TA = 25oC 0.06 0.04 80 90 100 0.2 0.1 0 PERCENTAGE OF MAXIMUM RATED V RMS (%) 74 0.3 0 110 FIGURE 3. STANDBY POWER DISSIPATION vs APPLIED VRMS AT VARIED TEMPERATURES 0.4 10 100 TIME AT RATED V RMS (HOURS) FIGURE 4. TYPICAL STABILITY OF STANDBY POWER DISSIPATION AT RATED V RMS vs TIME w w w. l i t t e l f u s e . c o m 1,000 Next Previous Varistor Products High Energy Industrial BA/BB Varistor Series Transient V-I Characteristics Curves TA = -55oC TO 85oC 3,000 2,000 30,000 V511BA60 V481BA60 V421BA60 MAX CLAMPING VOLTAGE DISC SIZE 60mm 1100 TO 2800VM(AC) RATING TA = -55oC TO 85oC 20,000 V881BA60 V751BA60 V661BA60 V571BA60 1,000 900 800 700 600 V321BA60 500 V271BA60 V251BA60 400 10,000 9,000 8,000 7,000 6,000 2 VARISTOR PRODUCTS MAX CLAMPING VOLTAGE DISC SIZE 60mm 130 TO 880VM(AC) RATING MAX PEAK VOLTS (V) MAXIMUM PEAK VOLTS (V) 6,000 5,000 4,000 V282BB60 5,000 V242BB60 4,000 V202BB60 V172BB60 3,000 V142BB60 300 V151BA60 V112BB60 V131BA60 200 10-2 10-1 100 101 102 103 PEAK AMPERES (A) 104 2,000 10-2 105 FIGURE 5. CLAMPING VOLTAGE FOR V131BA60 - V881BA60 10-1 100 101 102 PEAK AMPERES (A) 103 104 105 FIGURE 6. CLAMPING VOLTAGE FOR V112BB60 - V282BB60 Pulse Rating Curves 50,000 20,000 1 2 10 DISC SIZE 60mm V131BA60 - V321BA60 100,000 20,000 5,000 102 2,000 103 1,000 104 500 105 200 100 106 50 20 10 20 2 10 10,000 SURGE CURRENT (A) SURGE CURRENT (A) 10,000 DISC SIZE 60mm V421BA60 - V282BB60 1 50,000 5,000 102 2,000 103 1,000 104 500 105 200 100 106 50 INDEFINITE 100 20 1,000 IMPULSE DURATION (µs) FIGURE 7. SURGE CURRENT RATING CURVES FOR V131BA60 - V321BA60 10,000 10 20 INDEFINITE 100 1,000 10,000 IMPULSE DURATION ( µs) FIGURE 8. SURGE CURRENT RATING CURVES FOR V421BA60 - V282BB60 NOTE: If pulse ratings are exceeded, a shift of V N(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. w w w. l i t t e l f u s e . c o m 75 Next Previous Varistor Products High Energy Industrial BA/BB Varistor Series Mechanical Dimensions BA SERIES BB SERIES 100±1 (3.94± .039") CL 7.0 (0.28) 23.5±.75 (.925± .030") NOTES: 1. Typical weight: BA............................................................................................ ..250g BB...............................................................................................600g Dimensions are in mm; inches in parentheses for reference only. Ordering Information V XX X XX 60 VARISTOR DISC SIZE (60mm) SERIES DESIGNATOR VM(AC) First Significant Digits VM(AC) Decade Multiplier 76 w w w. l i t t e l f u s e . c o m CL