90
w w w . l i t t e l f u s e . c o m
Varistor Products
High Energy Industrial
HA Varistor Series
HA Series transient surge suppressors are industrial high energy
metal-oxide varistors (MOVs). They are designed to provide secondary
surge protection in the outdoor and service entrance environment
(distribution panels) of buildings, and also in industrial applications for
motor controls and power supplies used in the oil-drilling, mining, and
transportation fields.
The design of the HA Series of metal oxide varistors provide rigid
terminals for screw mounting. Also available in a clipped lead version
for through hole board placement or to accommodate soldered leads -
designation "HC".
See Ratings and Specifications table for part number and brand information.
Features
Wide Operating Voltage Range
VM(AC)RMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .110V to 750V
Two Disc Sizes Available . . . . . . . . . . . . . . . . . . . . . 32mm and 40mm
High Energy Absorption
Capability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .WTM = 170J to 1050J
High Peak Pulse Current
Capability,. . . . . . . . . . . . . . . . . . . . . . . . . . .ITM = 25,000A to 40,000A
Rigid Terminals for Secure Mounting
Available in Trimmed Version for Through Hole Board Mounting -
Designation "HC"
No Derating Up to 85
o
C Ambient
AGENCY APPROVALS:
Recognized under the components program of
Underwriters Laboratories. Certified by CSA.
AGENCY FILE NUMBERS:
UL E75961, CSA LR91788.
ALSO SEE
HB34 SERIES
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Varistor Products
2
V
ARIST
OR
PR
ODUCTS
High Energy Industrial
HA Varistor Series
Absolute Maximum Ratings
For ratings of individual members of a series, see Device Ratings and Specifications Chart
Continuous:
Steady State Applied Voltage:
AC Voltage Range (VM(AC)RMS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110 to 750
V
DC Voltage Range (VM(DC)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 148 to 970
V
Transient:
Peak Pulse Current (ITM)
For 8/20s Current Wave (See Figure 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25,000 to 40,000
A
Single Pulse Energy Range
For 2ms Current Square Wave (WTM ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 170 to 1050
J
Operating Ambient Temperature Range (TA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 85
o
C
Storage Temperature Range (TSTG) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 125
o
C
Temperature Coefficient (
V) of Clamping Voltage (VC) at Specified Test Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <0.01
%/
o
C
Hi-Pot Encapsulation (Isolation Voltage Capability). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2500
V
(Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202,
Method 301)
Insulation Resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1000M
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
HA SERIES UNITS
PART
NUMBER AND
DEVICE
BRANDING
MAXIMUM RATINGS (85
o
C)
SPECIFICATIONS (25
o
C)
CONTINUOUS
TRANSIENT
VARISTOR VOLTAGE
AT 1mA DC TEST
CURRENT
MAXIMUM
CLAMPING
VOLTAGE
(V
C
) AT 200A
(8/20
s)
TYPICAL
CAPACITANCE
AT f = 1MHz
V
RMS
V
DC
ENERGY
(2ms)
PEAK
CURRENT
(8/20
s)
V
M(AC)
V
M(DC)
W
TM
I
TM
MIN
V
N(DC)
MAX
V
C
C
(V)
(V)
ENERGY
(A)
(V)
(V)
(V)
(V)
(pF)
V131HA32
V131HA40
130
130
175
175
200
270
25000
40000
184
184
200
200
228
228
350
345
4700
10000
V151HA32
V151HA40
150
150
200
200
220
300
25000
40000
212
212
240
240
268
268
410
405
4000
8000
V251HA32
V251HA40
250
250
330
330
330
370
25000
40000
354
354
390
390
429
429
650
630
2500
5000
V181HA32
V181HA40
180
180
240
240
240
330
25000
40000
254
254
282
282
310
310
475
468
3200
6800
V201HA32
V201HA40
200
200
265
265
260
350
25000
40000
283
283
314
314
345
345
540
533
3180
6350
V271HA32
V271HA40
275
275
369
369
360
400
25000
40000
389
389
430
430
473
473
710
690
2200
4500
V301HA32
V301HA40
300
300
410
410
370
430
25000
40000
433
433
478
478
526
526
795
780
2050
4100
V321HA32
V321HA40
320
320
420
420
390
460
25000
40000
462
462
510
510
561
561
845
825
1900
3800
V331HA32
V331HA40
330
330
435
435
385
475
25000
40000
467
467
519
519
570
570
860
843
1870
3750
V351HA32
V351HA40
350
350
460
460
390
500
25000
40000
495
495
550
550
604
604
910
894
1800
3600
NOTE: Average power dissipation of transients not to exceed 2.0W per varistor
1. 40kA capability depends on applications rated up to 97Vrms. 30kA applies if >97 Vrms.
2. 40kA capability depends on applications rated up to 115Vrms. 30kA applies if >115 Vrms.
3. 40kA capability depends on applications rated up to 123Vrms. 30kA applies if >123 Vrms.
1. 40kA capability depends on applications rated up to 132Vrms. 30kA applies if >132Vrms.
1
V111HA32
V111HA40
110
110
148
148
160
220
25000
40000
156
156
173
173
190
190
293
288
5450
11600
1
2
V141HA32
V141HA40
140
140
188
188
210
290
25000
40000
198
198
220
220
248
248
380
375
4230
9000
3
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Varistor Products
HA Varistor Series
High Energy Industrial
PART
NUMBER AND
DEVICE
BRANDING
MAXIMUM RATINGS (85
o
C)
SPECIFICATIONS (25
o
C)
CONTINUOUS
TRANSIENT
VARISTOR VOLTAGE
AT 1mA DC TEST
CURRENT
MAXIMUM
CLAMPING
VOLTAGE
(V
C
) AT 200A
(8/20
s)
TYPICAL
CAPACITANCE
AT f = 1MHz
V
RMS
V
DC
ENERGY
(2ms)
PEAK
CURRENT
(8/20
s)
V
M(AC)
V
M(DC)
W
TM
I
TM
MIN
V
N(DC)
MAX
V
C
C
(V)
(V)
ENERGY
(A)
(V)
(V)
(V)
(V)
(pF)
V391HA32
V391HA40
385
385
510
510
395
550
25000
40000
545
545
604
604
663
663
1020
1000
1750
3500
V421HA32
V421HA40
420
420
560
560
400
600
25000
40000
610
610
680
680
748
748
1120
1100
1500
3000
V441HA32
V441HA40
440
440
585
585
420
630
25000
40000
622
622
691
691
759
759
1200
1147
1450
2900
V481HA32
V481HA40
480
480
640
640
450
650
25000
40000
670
670
750
750
825
825
1290
1230
1300
2700
V511HA32
V511HA40
510
510
675
675
500
700
25000
40000
735
735
820
820
910
910
1355
1295
1200
2500
V551HA32
V551HA40
550
550
710
710
530
755
25000
40000
778
778
864
864
949
949
1515
1430
1190
2390
V571HA32
V571HA40
575
575
730
730
550
770
25000
40000
805
805
910
910
1000
1000
1570
1480
1100
2200
V661HA32
V661HA40
660
660
850
850
600
900
25000
40000
940
940
1050
1050
1160
1160
1820
1720
1000
2000
V681HA32
V681HA40
680
680
875
875
610
925
25000
40000
962
962
1068
1068
1173
1173
1830
1780
850
1900
V751HA32
V751HA40
750
750
970
970
700
1050
25000
40000
1080
1080
1200
1200
1320
1320
2050
2000
800
1800
Device Ratings and Specifications
100
1000
10000
10000
0.001
0.01
0.1
1
10
100
1000
10000
100000
Maximum Clamping Voltage
HA40 Series
110 to 750V AC Rating
TA = -55 C to 85C
Current - (A)
Vo
l
tage
(V)
V751
V571
V551
V511
V481
V441
V421
V391
V351
V111
V131
V141
V151
V681
V331
V321
V301
V271
V251
V201
V181
V661
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Varistor Products
2
V
ARIST
OR
PR
ODUCTS
HA Varistor Series
High Energy Industrial
Power Dissipation Ratings
Should transients occur in rapid succession, the average power dissipa-
tion 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 for average power dissipation.
Transient V-I Characteristics Curves
100
90
80
70
60
50
40
30
20
10
0
-55
50
60
70
80
90
100
110
120
130
140 150
PERCENT OF RA
TED
V
ALUE
AMBIENT TEMPERATURE (
o
C)
FIGURE 1. CURRENT, ENERGY AND POWER DERATING
CURVE
FIGURE 2. PEAK PULSE CURRENT WAVEFORM
100
90
50
10
O
1
T
T
1
T
2
TIME
PERCENT OF PEAK V
ALUE
O
1
= Virtual Origin of Wave
T = Time From 10% to 90% of Peak
T
1
= Virtual Front Time = 1.25 t
T
2
= Virtual Time to Half Value (Impulse Duration)
Example: For an 8/20
s Current Waveform:
8
s = T
1
= Virtual Front Time
20
s = T
2
= Virtual Time to Half Value
100
1000
10000
0.001
0.01
0.1
1
10
100
1000
10000
100000
Current (A)
Vo
lt
ag
e (V)
TA = -55 C to 85C
V681CA32
V751CA32
V481CA32
V441CA32
V421CA32
V391CA32
V571CA32
V661HA32
V551CA32
V511CA32
V301CA32
V331CA32
V321CA32
V351CA32
V271CA32
V251CA32
V201CA32
V181CA32
V151CA32
V141CA32
V131CA32
C111CA32
Maximum Clamping Voltage
HA32 Series
110 to 750V AC Rating
FIGURE 3. MAXIMUM CLAMPING VOLTAGE (V111HA32 - V751HA32)
FIGURE 4. MAXIMUM CLAMPING VOLTAGE (V111HA40 - V751HA40)
Current (A)
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Varistor Products
High Energy Industrial
HA Varistor Series
D
H
B
X
T
T1
S
MAX
MAX
MIN
NOM
NOM MAX
OFFSET
HA32 35.5
52.00
3.0
25
9.3
10.4
Depends on
Device
Voltage
(See Table 2)
HA40 42.5
57.00
3.0
25
9.3
10.4
oA
MAX
4.2
4.2
D
H
B
X
T
R
S
C
MAX
MAX
MIN
NOM
NOM MAX
OFFSET
HC32
35.5
52.00
5.0
25
9.30
1.0
Depends on
Device
Voltage
(See Table 4)
HC40
42.5
57.00
5.0
25
9.30
1.0
VOLTAGE
THICKNESS "W"
DIMENSION "S"
(
1mm)
HA32
HA40
HA32
HA40
V111 - V351
9.00
9.00
3.90
3.90
V391 - V511
11.00
11.00
2.60
2.60
V551 - V751
13.00
13.00
1.00
1.00
TABLE 2. HA SERIES MAXIMUM THICKNESS AND TERMINAL
OFFSETS
(Dimensions in Millimeters)
(
)
VOLTAGE
THICKNESS "W"
DIMENSION "S
C
"
(
1mm)
HC32
HC40
HC32
HC40
V111 - V351
9.00
9.00
6.00
6.00
V391 - V511
11.00
11.00
7.30
8.10
V551 - V751
13.00
13.00
8.90
10.00
TABLE 4. HC SERIES MAXIMUM THICKNESS AND
TERMINAL OFFSETS
(Dimensions in Millimeters)
Ordering Information
VARISTOR
V
M(AC)
First Two Significant
Digits
DISC SIZE (mm)
V XX X HA XX
SERIES DESIGNATOR
HA or HC
V
M(AC)
Decade Multiplier
Pulse Rating Curves
FIGURE 5. SURGE CURRENT RATING CURVES FOR
V111HA32 - V751HA32
DISC SIZE 32mm
V111HA32 - V751HA32
50,000
20,000
10,000
5,000
2,000
1,000
500
200
100
50
20
10
20
100
1,000
10,000
SURGE CURRENT (A)
IMPULSE DURATION (
s)
10
2
1
INDEFINITE
10
2
10
3
10
4
10
5
10
6
FIGURE 7. SURGE CURRENT RATING CURVES FOR
V111HA40 - V751HA40
DISC SIZE 40mm
V111HA40 - V751HA40
50,000
20,000
10,000
5,000
2,000
1,000
500
200
100
50
20
10
20
100
1,000
10,000
SURGE CURRENT (A)
IMPULSE DURATION (
s)
2
1
INDEFINITE
10
2
10
3
10
4
10
5
10
6
10
Mechanical Dimensions
TABLE 1. HA SERIES OUTLINE SPECIFICATIONS
(Dimensions in Millimeters)
TABLE 3. HC SERIES OUTLINE SPECIFICATIONS
(Dimensions in Millimeters)
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