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Data Sheet
AS Series
January 1998 File Number 2492.4
[ /Title
(AS
Series)
/Sub-
ject
(High
Energy
Metal-
Oxide
Arreste
r
Blocks
)
/Autho
r ()
/Key-
words
(TVS,
Tran-
sient
Sup-
pres-
sion,
Protec-
tion,
Arreste
r,
Light-
ning
Protec-
tion,
High Energy Metal-Oxide Arrester Blocks
The AS Series of Arrester blocks is primarily designed to be
used as the surge suppression element within a lightning
arrester assembly. These arrester blocks provide the high
peak surge current and energy ratings required for the
protection of high voltage AC power utility distribution
systems. Typically, these devices are placed within a special
arrester housing provided by the customer, and stacked to
achieve the necessary continuous working voltage ratings
for the specific application. (See the CA or NA series of
Varistor discs for lower voltage and energy applications.)
NoFtoRPrerNBocedeoWwuemnciDtmthDeSeiNsnesiorcgdioneeRndssetHp–inlaausceedment
Features
• Provided in Disc Form for Unique Packaging by
Customer
• Electrode Finish Enables Pressure Contact for Stacking
Application
• Available Disc Sizes: 32mm, 42mm and 60mm Diameter
• No Follow Current
• High Surge Current Capability
• Conforms to IEC 99-4 and ANSI/IEEE C62.11 Industry
Standards
• Characterized for Lightning Arrester Parameters
Applications
• Lightning Protection of Electrical AC Distribution
Transformers and Systems
• Arrester Assemblies of the Porcelain Polymeric,
“Under-oil” and Metal Clad Variety
Packaging
AS SERIES
OBSOLETE
PART
8-3 1-800-999-9445 or 1-847-824-1188 | Copyright © Littelfuse, Inc. 1998

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AS Series
Absolute Maximum Ratings For ratings of individual members of a series, see Device Ratings and Specifications chart
Rated Voltage
AC Voltage Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steady State Applied Voltage
AC Voltage (MCOV) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transient
Peak Pulse Current (ITM) for 4/10 µs Current Wave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Energy Rating for 2ms Current Wave . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Ambient Temperature (TA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AS SERIES
3.00 to 6.00
2.55 to 5.10
65 to 100
2.2 to 12
60
UNITS
kV
kV
kA
kJ
oC
STORAGE AND HANDLING NOTES:
1. Arrester blocks should be stored in a moisture free environment at all times.
2. Use caution during handling to prevent damage or chipping of edges of the arrester blocks.
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 25oC Unless Otherwise Specified
PART NUMBER
PARAMETER
V302AS32 V402AS32 V502AS32 V602AS32 V302AS42 V402AS42 V502AS42 V402AS60 UNITS
Rated Voltage (RMS)
3.0 4.0 5.0 6.0 3.0 4.0 5.0 4.0
Maximum Continuous
2.55
3.40
4.25
5.1
2.55
3.40
4.25
3.40
Operating Voltage (MCOV)
Reference Current, IREF
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
Minimum Reference
OBSOLETEVoltage,VREF
3.12
4.16
5.20
6.24
3.12
4.16
5.20
4.16
Nominal Discharge
Current, IP (8/20µs)
Residual Voltage (Max) at
IP
Energy Rating at 60oC
(2ms)
Peak Current, 4/10µs at
60oC (Note 4)
5.0
9.8
2.2
65.0
5.0
5.0
5.0
10.0
10.0
10.0
10.0
PART13.1
16.3
19.6
10.0
13.3
16.7
12.5
2.9 3.6 4.3 3.5 4.7 5.8 12.0
65.0
65.0
65.0
100.0
100.0
100.0
100.0
kV
kV
mA
kVRMS
kA
kV
kJ
kA
Maximum Steep Current
11.3
15.0
18.8
22.5
-
-
-
- kV
Residual Voltage at 5kA
(1/20µs)
Maximum Steep Current
-
-
-
-
11.5
15.3
19.2
14.4 kV
Residual Voltage at 10kA
(1/20µs)
Maximum Dissipation
Power at MCOV
0.23
0.30
0.38
0.45
0.36
0.48
0.60
0.50 W
Maximum Conduction
Current at MCOV
75.0
75.0
75.0
75.0
110.0
110.0
110.0
140.0
µA
NOTES:
3. In addition to above standard types, custom ratings and dimensions can be provided.
4. Parts should be wrapped using a secondary insulating film or encased by polymeric housing.
8-4

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AS Series
Performance Curves
1.3
1.25
1.2
1.15
1.1
1.05
1
0.1
1
10
100
1000
10000
TIME (s)
FIGURE 1. TEMPORARY OVERVOLTAGE CAPABILITY (TOV)
FOR AS SERIES ARRESTERS
35
30
25
V602AS32
20
V502AS32
V402AS32
V302AS32
15
10
5
0
0.001 0.01
0.1 1 10 100 1000 10,000 100,000
PEAK IMPULSE CURRENT (A)
FIGURE 2. V-I CHARACTERISTIC AS32 SIZE
30 20
25
15
20
V502AS42
V402AS42
15 V302AS42
10
OBSOLETE5
10 V402AS60
5
0
0.001
0
0.01 0.1 1 10 100 1000 10,000 100,000
0.001 0.01 0.1 1 10 100 1000 10,000 100,000
PARTPEAK IMPULSE CURRENT (A)
FIGURE 3. V-I CHARACTERISTIC AS42 SIZE
PEAK IMPULSE CURRENT (A)
FIGURE 4. V-I CHARACTERISTIC AS60 SIZE
8-5

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Dimensions
ELECTRODE
OF SPRAYED
ALUMINUM
PARTICLES
AS Series
PASSIVATION COLLAR
TYPICAL THICKNESS = 0.07mm
FACE CAMBER
= 0.15mm MAX
D
ELECTRODE
= 0.10mm TYPICAL
H
DIMENSIONS (IN MILLIMETERS)
PARAMETER
Diameter (D)
OBSOLETEMin
PART NUMBER
V302AS32 V402AS32 V502AS32 V602AS32 V302AS42 V402AS42 V502AS42 V402AS60 UNITS
32.3
32.3
32.3
32.3
40.9
40.9
40.9
60.0 mm
Max
33.7
33.7
33.7
33.7
42.3
42.3
42.3
62.0 mm
Height (H)
Min
20.0
27.0
34.0
41.0
20.0
27.0
34.3
35.3 mm
Max
21.5
28.5
35.5
42.5
21.5
28.5
35.8
36.8 mm
PARTOrdering Information
VXXX ASXX TYPES
V 30 2 AS 60
AS SERIES
VARISTOR
TECHNOLOGY
MCOV BASE VALUE
DIAMETER SIZE (mm)
ARRESTER SERIES
MCOV DECADE MULTIPLIER
8-6