The PA Series of transient surge suppressors are metal-oxide varistors Array (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 85o C Ambient
AGENCY APPROVALS:Recognized under the components program of Underwriters Laboratories.Certified by CSA.
AGENCY FILE NUMBERS:UL E75961, CSA LR91788.
2V A R I S T O R P R O D U C T S
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 660V DC Voltage Range (V M(DC)) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 175 to 850V
Transient:
Peak Pulse Current (I TM )
For 8/20μs Current Wave (See Figure 2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6500A Single Pulse Energy Range
For 10/1000μs Current Wave (W TM ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 to 250J
Operating Ambient Temperature Range (T A ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 85O
C
Storage Temperature Range (T STG ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to 125O
C Temperature Coefficient (αV) of Clamping Voltage (V C ) 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 (85o C)
SPECIFICATIONS (25o C)
CONTINUOUS
TRANSIENT
VARISTOR VOLTAGE
AT 1mA DC TEST CURRENT MAX CLAMPING VOLT V C AT TEST CURRENT (8/20μs)TYPICAL CAPACI-TANCE V 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)(p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
660
850
250
6500
940
1050
1210
1820
100
400
V350PA40A V350PA40C
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 DERA TING
CURVE
1009080706050403020100P E R C E N T O F R A T E D V A L U E
AMBIENT TEMPERA TURE (o C)
FIGURE 2.PEAK PULSE CURRENT TEST WA VEFORM
O P E R C E N T O F P E A K V A L U E
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 8/20μs Current Waveform:8μs = T 1 = Virtual Front Time
20μs = T 2 = Virtual Time to Half Value
FIGURE 3.CLAMPING VOL TAGE FOR V130PA20A -
V660PA100A
200
900
800
700600500
400
300
10101010101010M A X I M U M P E A K V O L T S (V )
PEAK AMPERES (A)
10FIGURE 4.CLAMPING VOL TAGE FOR V130PA20C -
V660PA100C
200
6,0005,0004,000
3,0001,000900800
700600500
400300
M A X I M U M P E A K V O L T S (V )
PEAK AMPERES (A)
2,000
2
V A R I S T O R P R O D U C T S
PA Varistor Series
Pulse Rating Curves
Mechanical Dimensions
FIGURE 5.SURGE CURRENT RA TING CURVES FOR
V130PA20A - V320PA40C FIGURE 6.SURGE CURRENT RA TING CURVES FOR
V420PA40A - V660PA100C
10,0002,00020010050201052500
IMPULSE DURA TION (μs)
S U R G E C U R R E N T (A )1,0005,000110,0002,00020010050201052
50020
100
1,000
10,000
IMPULSE DURA TION (μs)
S U R G E C U R R E N T (A )1,0005,0001NOTE: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 V N(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.
T ab 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.T
ypical weight: 30g.
TING SYM-BOL MILLIMETERS INCHES NOTES MIN NOM MAX MIN NOM MAX A --14.3--0.570-b -- 6.6
-
-0.2601b2 3.94 4.06 4.180.1550.1600.165-b3 3.05 3.17 3.290.1200.1250.130-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 7.507.627.750.2950.3000.305-h -0.8 1.0-0.0300.040-H 1--25.6-- 1.0103H 2--28.3-- 1.1203H 3--32.8-- 1.2903J --8.1--0.320-?P 5.6- 6.00.220-0.240-Q 50.650.851.0 1.990 2.000 2.010-S 18.419.220.00.720.750.78-T -- 1.0--0.040-?T 2.8--0.110---T C
- 3.2
--
0.126
-2
PA Varistor Series
Suggested Hardware and Mounting Arrangements
TYPICAL NON-ISOLATED MOUNTING
TYPICAL ISOLATED MOUNTING
THERMAL
GREASE LA YER
#10-32 PAN HEAD SCREW
#10 FLA T WASHER
VARISTOR
MOUNTING LOCK WASHER
#10-32 NUT
SURFACE
THERMAL GREASE LA YER
#6 FLA T WASHER
PHENOLIC SHOULDER SPACER
VARISTOR
MOUNTING LOCK W ASHER #6-32 NUT
SURFACE
MICA INSULA TOR 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
SERIES DESIGNATOR