LITTELFUSE PA User Manual
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 V
M(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
V
M(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.
®
®
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Varistor Products
2
VARISTOR
PRODUCTS
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 (V
M(AC)RMS
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130 to 660 V
DC Voltage Range (V
M(DC)
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175 to 850 V
Transient:
Peak Pulse Current (ITM)
For 8/20µs Current Wave (See Figure 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6500 A
Single Pulse Energy Range
For 10/1000µs Current Wave (WTM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 to 250 J
Operating Ambient Temperature Range (TA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 85
O
C
Storage Temperature Range (T
STG
) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 125
O
C
Temperature Coefficient (αV) of Clamping Voltage (VC) at Specified Test Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <0.01 %/OC
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 RA TINGS (85
o
C) SPECIFICATIONS (25oC)
CONTINUOUS TRANSIENT
VARISTOR VOLTAGE
AT 1mA DC
TEST CURRENT
MAX CLAMPING
VOLT V
C
AT TEST
CURRENT (8/20µs)
TYPICAL
CAPACI-
TANCEV
RMS
V
DC
ENERGY
(10/1000µs)
PEAK
CURRENT
(8/20µs)
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
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