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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.
(R)
BA SERIES BB SERIES
Features
* 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.
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Varistor Products
High Energy Industrial
BA/BB Varistor Series
Absolute Maximum Ratings
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 8/20s 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 (V) 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
2
VARISTOR PRODUCTS
A J C 0 C
0
%/0C V
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 ENERGY (2ms) WTM (J) 450 530 880 950 1100 1500 1600 1800 2100 2300 2600 3200 3800 5000 6000 7500 8600 10000 PEAK CURRENT (8/20s) ITM (A) 50000 50000 50000 50000 50000 70000 70000 70000 70000 70000 70000 70000 70000 70000 70000 70000 70000 70000 VARISTOR VOLTAGE AT 1mA DC TEST CURRENT MIN (V) 184 212 354 389 462 610 670 735 805 940 1080 1290 1620 2020 2500 2970 3510 4230 VN(DC) (V) 200 240 390 430 510 680 750 820 910 1050 1200 1500 1800 2200 2700 3300 3900 4700 MAX (V) 228 268 429 473 561 748 825 910 1000 1160 1320 1650 2060 2550 3030 3630 4290 5170 MAX CLAMPING VOLT V C AT 200A CURRENT (8/20s) VC (V) 340 400 620 680 760 1060 1160 1300 1420 1640 1880 2340 2940 3600 4300 5200 6200 7400 TYPICAL CAPACITANCE f = 1MHz (pF) 20000 16000 10000 9000 7500 6000 5500 5000 4500 4000 3500 2700 2200 1800 1500 1200 1000 800 SPECIFICATIONS (25 oC)
VRMS PART NUMBER AND DEVICE BRANDING V131BA60 V151BA60 V251BA60 V271BA60 V321BA60 V421BA60 V481BA60 V511BA60 V571BA60 V661BA60 V751BA60 V881BA60 V112BB60 V142BB60 V172BB60 V202BB60 V242BB60 V282BB60 VM(AC) (V) 130 150 250 275 320 420 480 510 575 660 750 880 1100 1400 1700 2000 2400 2800
VDC VM(DC) (V) 175 200 330 369 420 560 640 675 730 850 970 1150 1400 1750 2150 2500 3000 3500
NOTE: Average power dissipation of transients not to exceed 2.5W. See Figures 3 and 4 for more information on power dissipation.
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Varistor Products
High Energy Industrial
BA/BB 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 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.
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)
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
Typical Performance Curves
TYPICAL TEMPERATURE COEFFICIENT OF POWER DISSIPATION = 2.2%/ oC 1.0 0.8 POWER DISSIPATION (W) PER kV OF RATED V RMS 0.6 0.4 MAX A TA = 25oC T MAX A TA = 85oC T POWER DISSIPATION (W) PER kV OF RATED V RMS 0.5 1,000 HOURS, TA = 85oC
0.4
0.3
0.2
0.2
0.1 0.08 0.06 0.04
TYP AT TA = 25oC
0.1
80
90
100
110
0 0 10 100 TIME AT RATED V RMS (HOURS) 1,000
PERCENTAGE OF MAXIMUM RA TED V RMS (%)
FIGURE 3. STANDBY POWER DISSIPATION vs APPLIED VRMS AT VARIED TEMPERATURES
FIGURE 4. TYPICAL STABILITY OF STANDBY POWER DISSIPATION AT RATED V RMS vs TIME
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Varistor Products
High Energy Industrial
BA/BB Varistor Series
Transient V-I Characteristics Curves
6,000 5,000 4,000 MAXIMUM PEAK VOLTS (V) 3,000 2,000 MAX CLAMPING VOLTAGE DISC SIZE 60mm 130 TO 880VM(AC) RATING TA = -55oC TO 85oC
V881BA60 V751BA60 V661BA60 V571BA60
30,000 V511BA60 V481BA60 V421BA60 MAX PEAK VOLTS (V)
20,000
MAX CLAMPING VOLTAGE DISC SIZE 60mm 1100 TO 2800VM(AC) RATING TA = -55oC TO 85oC
2
VARISTOR PRODUCTS
1,000 900 800 700 600 V321BA60 500 V271BA60 V251BA60 400 300 V151BA60
V131BA60
10,000 9,000 8,000 7,000 6,000
V282BB60
5,000 V242BB60 4,000 V202BB60 3,000 V142BB60
V112BB60 V172BB60
200 10-2
10-1
100
101 102 103 PEAK AMPERES (A)
104
105
2,000 10-2
10-1
100
101 102 PEAK AMPERES (A)
103
104
105
FIGURE 5. CLAMPING VOLTAGE FOR V131BA60 - V881BA60
FIGURE 6. CLAMPING VOLTAGE FOR V112BB60 - V282BB60
Pulse Rating Curves
50,000 20,000 10,000 SURGE CURRENT (A) SURGE CURRENT (A) 5,000 2,000 1,000 500 200 100 106 50 20 10 20 INDEFINITE 102 103 104 105 10 1 2 DISC SIZE 60mm V131BA60 - V321BA60 100,000 50,000 20,000 10,000 5,000 2,000 1,000 500 200 100 50 20 1,000 IMPULSE DURATION (s) 10,000 10 20 INDEFINITE 100 1,000 10,000 106 102 103 104 105 1 10 2 DISC SIZE 60mm V421BA60 - V282BB60
100
IMPULSE DURA TION ( s)
FIGURE 7. SURGE CURRENT RATING CURVES FOR V131BA60 - V321BA60
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.
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Varistor Products
High Energy Industrial
BA/BB Varistor Series
Mechanical Dimensions
BA SERIES
1001 (3.94 .039")
BB SERIES
C L
7.0 (0.28)
C L
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)
VM(AC) First Significant Digits VM(AC) Decade Multiplier
SERIES DESIGNATOR
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