132
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Varistor Products
Base Mount
PA Varistor Series
The PA Series of transient surge suppressors are metal-oxide varistors
(MOVs) featuring a rigid base mount package construction, and are
useful in applications which are subject to vibration.
These UL and CSA recognized varistors are available in a wide range of
operating voltages, from 130V to 660V VM(AC)RMS . The base-mount
package has a quick-connect tab terminal that provides a fast, secure
lead attach. The mounting base forms the second electrical connection,
usually chassis ground. Meeting rigid NEMA standards, PA series
varistors have a creep and strike distance capability that minimizes
breakdown along the package surface.
See PA Series Device Ratings and Specifications table for part number
and brand information.
Features
Wide Operating Voltage Range
VM(AC)RMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .130V to 660V
Creep and Strike Distance Capability Meets Rigid NEMA Standards
Base Mount Construction Forms One Electrical Connection
Quick Connect Tab Terminal
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.
133
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Varistor Products
2
V
ARIST
OR
PR
ODUCTS
Base Mount
PA 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) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 to 660
V
DC Voltage Range (VM(DC)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175 to 850
V
Transient:
Peak Pulse Current (ITM)
For 8/20s Current Wave (See Figure 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6500
A
Single Pulse Energy Range
For 10/1000s Current Wave (WTM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 to 250
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
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
PA 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
MAX CLAMPING
VOLT V
C
AT TEST
CURRENT (8/20
s)
TYPICAL
CAPACI-
TANCE
V
RMS
V
DC
ENERGY
(10/1000
s)
PEAK
CURRENT
(8/20
s)
V
M(AC)
V
M(DC)
W
TM
I
TM
MIN
V
N(DC)
MAX
V
C
I
P
f = 1MHz
(V)
(V)
(J)
(A)
(V)
(V)
(V)
(V)
(A)
(pF)
V130PA20A
130
175
70
6500
184
200
243
360
100
1900
V130PA20C
130
175
70
6500
184
200
220
325
100
1900
V150PA20A
150
200
80
6500
212
240
284
420
100
1600
V150PA20C
150
200
80
6500
212
240
243
360
100
1600
V250PA40A
250
330
130
6500
354
390
453
675
100
1000
V250PA40C
250
330
130
6500
354
390
413
620
100
1000
V275PA40A
275
369
140
6500
389
430
494
740
100
900
V275PA40C
275
369
140
6500
389
430
453
680
100
900
V320PA40A
320
420
160
6500
462
510
565
850
100
750
V320PA40C
320
350
350
420
460
460
160
165
165
6500
6500
6500
462
500
500
510
559
535
540
618
570
800
910
840
100
100
100
750
700
700
V420PA40A
420
560
170
6500
610
680
790
1160
100
600
V420PA40C
420
560
170
6500
610
680
690
1050
100
600
V480PA80A
480
640
180
6500
670
750
860
1280
100
550
V480PA80C
480
640
180
6500
670
750
790
1160
100
550
V510PA80A
510
675
190
6500
735
820
963
1410
100
500
V510PA80C
510
675
190
6500
735
820
860
1280
100
500
V575PA80A
575
730
220
6500
805
910
1050
1560
100
450
V575PA80C
575
730
220
6500
805
910
960
1410
100
450
V660PA100A
660
850
250
6500
940
1050
1210
1820
100
400
V350PA40A
V350PA40C
134
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Varistor Products
PA Varistor Series
Power Dissipation Ratings
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.
Transient V-I Characteristics Curves
FIGURE 1. CURRENT, ENERGY AND POWER DERATING
CURVE
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 2. PEAK PULSE CURRENT TEST 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
FIGURE 3. CLAMPING VOLTAGE FOR V130PA20A -
V660PA100A
200
6,000
5,000
4,000
3,000
1,000
900
800
700
600
500
400
300
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
4
MAXIMUM PEAK
V
O
L
TS (V)
PEAK AMPERES (A)
2,000
10
3
MAXIMUM CLAMPING VOLTAGE
"A" SUFFIX
130 TO 660V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
C
V320PA40A
A40A
V660PA80A
V575PA80A
V510PA80A
V480PA80A
V420PA80A
V275PA40A
V250PA40A
V150PA20A
V130PA20A
FIGURE 4. CLAMPING VOLTAGE FOR V130PA20C -
V660PA100C
200
6,000
5,000
4,000
3,000
1,000
900
800
700
600
500
400
300
10
-3
10
-2
10
-1
10
0
10
1
10
2
10
4
MAXIMUM PEAK
V
O
L
TS (V)
PEAK AMPERES (A)
2,000
10
3
MAXIMUM CLAMPING VOLTAGE
"C" SUFFIX
130 TO 660V
M(AC)
RATING
T
A
= -55
o
C TO 85
o
C
V150PA20C
V130PA20C
V660PA100C
V575PA80C
V510PA80C
V480PA80C
V420PA80C
V275PA40C
V250PA40C
V320PA40C
V350PA40C
Base Mount
135
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Varistor Products
2
V
ARIST
OR
PR
ODUCTS
Base Mount
PA Varistor Series
Pulse Rating Curves
Mechanical Dimensions
FIGURE 5. SURGE CURRENT RATING CURVES FOR
V130PA20A - V320PA40C
FIGURE 6. SURGE CURRENT RATING CURVES FOR
V420PA40A - V660PA100C
10,000
2,000
200
100
50
20
10
5
2
500
20
100
1,000
10,000
IMPULSE DURATION (
s)
SURGE CURRENT (A)
1
2
10
4
10
5
10
6
DISC SIZE 20mm
V130PA20A - V320PA40C
10
3
INDEFINITE
1,000
10
2
10
5,000
1
10,000
2,000
200
100
50
20
10
5
2
500
20
100
1,000
10,000
IMPULSE DURATION (
s)
SURGE CURRENT (A)
1
2
10
4
10
5
10
6
DISC SIZE 20mm
V420PA40A - V660PA100C
10
3
INDEFINITE
1,000
10
2
10
5,000
1
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 transient protection
NOTES:
1. Tab is designed to fit 1/4" quick-connect terminal.
2. Case temperature is measured at T
C
on top surface of base
plate.
3. H
1
(130-150V
RMS
devices).
H
2
(250-320V
RMS
devices).
H
3
(420-660V
RMS
devices).
4. Electrical connection: top terminal and base plate.
5. Typical weight: 30g.
D
Q
S
F
C
B
P
2 HOLES
D
1
T
T
C
H
1, 2, 3
J
h
E
b
b
3
T
TAB
b
2
A
SEATING
PLANE
SYM-
BOL
MILLIMETERS
INCHES
NOTES
MIN
NOM
MAX
MIN
NOM
MAX
A
-
-
14.3
-
-
0.570
-
b
-
-
6.6
-
-
0.260
1
b2
3.94
4.06
4.18 0.155
0.160
0.165
-
b3
3.05
3.17
3.29 0.120
0.125
0.130
-
B
-
-
12.9
-
-
0.510
-
C
-
-
6.6
-
-
0.260
-
D
-
-
66.3
-
-
2.610
-
D1
-
-
33.5
-
-
1.320
-
E
-
11.2
-
-
0.440
-
-
F
7.50
7.62
7.75 0.295
0.300
0.305
-
h
-
0.8
1.0
-
0.030
0.040
-
H
1
-
-
25.6
-
-
1.010
3
H
2
-
-
28.3
-
-
1.120
3
H
3
-
-
32.8
-
-
1.290
3
J
-
-
8.1
-
-
0.320
-
P
5.6
-
6.0
0.220
-
0.240
-
Q
50.6
50.8
51.0
1.990
2.000
2.010
-
S
18.4
19.2
20.0
0.72
0.75
0.78
-
T
-
-
1.0
-
-
0.040
-
T
2.8
-
-
0.110
-
-
-
T
C
-
3.2
-
-
0.126
-
2
136
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Varistor Products
PA Varistor Series
Suggested Hardware and Mounting Arrangements
TYPICAL NON-ISOLATED MOUNTING
TYPICAL ISOLATED MOUNTING
THERMAL
GREASE
LAYER
#10-32 PAN HEAD
SCREW
#10 FLAT WASHER
VARISTOR
MOUNTING
LOCK WASHER
#10-32 NUT
SURFACE
THERMAL
GREASE
LAYER
#6 FLAT WASHER
PHENOLIC SHOULDER
SPACER
VARISTOR
MOUNTING
LOCK WASHER
#6-32 NUT
SURFACE
THERMAL
QUICK
CONNECT
MICA INSULATOR
WASHER
#6-32 SCREW
(NOTE 6)
NOTE:
6. GE G623, Dow Corning, DC3, 4, 340, or 640 Thermal Grease recommended for best heat transfer.
1,000V Isolation Kit containing the following parts can be ordered by part #A7811055 (Qty).
Ordering Information
(1) MICA insulation 1"/3.1"/0.005" thick
(1) 1/4 " quick-connect terminal
(2) Phenolic shoulder washer
(1) Spacer
(2) #6-32/3 / 4 screw
(2) #6-32 nut
(2) #6 internal tooth lock washer
(2) #6 flat washer
VARISTOR
V
M(AC)
130V to 660V
CLAMPING VOLTAGE
SELECTION DESIGNATOR
A = Standard
C = Low Clamp Voltage Option
SERIES DESIGNATOR
V XXX PA XX X
RELATIVE ENERGY INDICATOR
Base Mount
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