ELECTRONICS
Metal
Oxide
Varistors
20D Series
Circuit Protection
System
Specifications are subject to change without notice.
Please refer to
http://www.ruilon.com
for current information.
Metal Oxide Varistors - 20D Series
Features
1. Wide operating voltage (V1mA) range from 8V to 1800V.
2. Fast responding to transient over-voltage.
3. Large absorbing transient energy capability.
4. Low clamping ratio and no following-on current.
General Information
The MOV-20DxxxK Series of 20mm radial leaded varistor devices protects against overvoltage transients such as lightning,
power contact and power induction. The metal oxide varistors offer a choice of varistor voltages from 18 V to 1800 V and Vrms
voltages from 11 V to 1000 V. The devices have a high current handling, high energy absorption capability and fast response
times to protect against transient faults up to rated limits.
General Characteristics
No Radioactive Material Storage Temperature: -55ºC to +125ºC
Operating Temperature: -55ºC to +85ºC
Body: Nickel Plated
Leads: Surface-mount, Axial Devices: Tin Plated
Devices with No Leads: Nickel Plated
Product Name
2
0
D
4
7
1
K
Disc Diameter
20=20MM
Type
D: Disk
S: Square
Nominal Varistor Voltage
471=47*101V
Varistor Voltage
Tolerance
K = 10 %
Circuit Protection
System
Specifications are subject to change without notice.
Please refer to
http://www.ruilon.com
for current information.
Page:1
Metal Oxide Varistors - 20D Series
Electriacl Characteristics
Type Number
Maximum
Allowable Voltage
V
AC
(V) V
DC
(V)
11
14
17
20
25
30
35
40
50
60
75
95
115
130
140
150
175
190
210
230
250
275
300
320
350
385
420
460
485
510
550
625
680
740
850
900
1000
1000
14
18
22
26
31
38
45
56
65
85
100
125
150
170
180
200
225
250
275
300
320
350
385
415
460
505
560
615
640
670
745
825
895
975
1100
1220
1280
1465
Varistor Voltage
Maximum
Clamping
Voltage
I
P
(A) V
C
(V)
20
20
20
20
20
20
20
20
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
36
43
53
65
77
93
100
135
135
165
200
250
300
340
360
395
455
500
550
595
650
710
775
845
925
1025
1120
1240
1290
1355
1500
1650
1815
2010
2255
2475
2640
2970
Withstanding
Surge Current
I(A)
I(A)
Maximum Energy Rated
(10/1000μs)
Power
(J)
11
14
16
23
26
30
41
46
38
45
55
70
85
95
100
108
127
136
150
163
180
190
220
220
220
220
230
255
265
282
310
342
383
412
470
529
606
625
(J)
13
16
19
24
28
34
41
49
56
70
85
106
130
140
155
168
190
210
228
255
275
305
350
360
380
390
400
420
440
460
510
565
620
660
725
815
896
660
(W)
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
Typical
Capacitance
(Reference)
@1KHz(pf)
28500
18500
13000
11500
8500
7400
6500
5800
4900
4000
3300
2700
2200
2000
1800
1650
1500
1300
1200
1100
1000
930
850
780
710
650
600
580
560
525
495
480
460
440
415
400
330
320
Standard
20D180K
20D220K
20D270K
20K330K
20D390K
20D470K
20D560K
20D680K
20D820K
20D101K
20D121K
20D151K
20D181K
20D201K
20D221K
20D241K
20D271K
20D301K
20D331K
20D361K
20D391K
20D431K
20D471K
20D511K
20D561K
20D621K
20D681K
20D751K
20D781K
20D821K
20D911K
20D102K
20D112K
20D122K
20D142K
20D152K
20D162K
20D182K
High Surge
20D180KJ
20D220KJ
20D270KJ
20K330KJ
20D390KJ
20D470KJ
20D560KJ
20D680KJ
20D820KJ
20D101KJ
20D121KJ
20D151KJ
20D181KJ
20D201KJ
20D221KJ
20D241KJ
20D271KJ
20D301KJ
20D331KJ
20D361KJ
20D391KJ
20D431KJ
20D471KJ
20D511KJ
20D561KJ
20D621KJ
20D681KJ
20D751KJ
20D781KJ
20D821KJ
20D911KJ
20D102KJ
20D112KJ
20D122KJ
20D142K
20D152K
20D162KJ
20D182KJ
V
1mA
(V)
18(15~21.6)
22(19.5~26)
27(24~30)
33(29.5~36.5)
39(35~43)
47(42~54)
56(50~62)
68(61~75)
82(74~90)
100(90~110)
120(108~132)
150(135~165)
180(162~198)
200(180~220)
220(198~242)
240(216~264)
270(243~297)
300(270~330)
330(297~363)
360(324~396)
390(351~429)
430(387~473)
470(423~517)
510(459~561)
560(504~616)
620(558~682)
680(612~748)
750(675~825)
780(702~858)
820(738~902)
910(819~1001)
1000(900~1100)
1100(990~1210)
1200(1080~1320)
1400(1260~1540)
1500(135~1650)
1600(1440~1760)
1800(1620~1980)
Standard
High Surge
Standard
High Surge
2000
2000
2000
2000
2000
2000
2000
2000
6500
6500
6500
6500
6500
6500
6500
6500
6500
6500
6500
6500
6500
6500
6500
6500
6500
6500
6500
6500
6500
6500
6500
6500
6500
6500
6500
6500
6500
6500
3000
3000
3000
3000
3000
3000
3000
3000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
10000
Circuit Protection
System
Specifications are subject to change without notice.
Please refer to
http://www.ruilon.com
for current information.
Page:2
Metal Oxide Varistors - 20D Series
Electrical Rating
ltem
Test Condition / Description
The voltage between two terminals with the specified measuring current 1mA.
DC applied is call Vb.
Requirement
Varistor Voltage
Maximum Allowable
The recommended maximum sine wave voltage (RMS) or the maximum DC
Voltage
voltage can be applied continuously.
The maximum average power that can be applied within the specified ambient
temperature.
The maximum energy within the varistor voltage change of ±10% when one impulse
of10/1000μsec. or 2 msec. is applied.
To meet
the specified
value
Rated Wattaget
IEnergy
Withstanding Surge
The maximum current within the varistor voltage change of ±10% with the standard
Current
impulse current (8/20μsec.) applied one time.
The change of Vb shall be measured after the impulse listed below is applied 10,000
times continuously with the interval of ten seconds at room temperature.
180K to 680K
5D series
820K to 751K
180K to 680K
7Dseries
820K to 821K
Surge Life
10D series
820K to 182K
180K to 680K
14D series
820K to 182K
180K to 680K
20D series
820K to 182K
200A (8/20μsec.)
150A (8/20μsec.)
100A (8/20μsec.)
100A (8/20μsec.)
75A (8/20μsec.)
180K to 680K
50A (8/20μsec.)
50A (8/20μsec.)
20A (8/20μsec.)
25A (8/20μsec.)
Vb
Vb
_
<+10%
10A (8/20μsec.)
Circuit Protection
System
Specifications are subject to change without notice.
Please refer to
http://www.ruilon.com
for current information.
Page:3
Metal Oxide Varistors - 20D Series
Current Energy and Power Dissipation Ratings
Should transients occur in rapid succession, the average power dissipation is 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. The operating values of a MOV need to be derated at high temperatures as
shown above. Because varistors only dissipate a relatively small amount of average power they are not suitable for repetitive
applications that involve substantial amounts of average power dissipation.
Figure 1A - Power Derating for Epoxy Coated
Figure 1B - Power Derating for Pholenic Coated
100
100
PERCENT OF RATED VALUE
80
70
60
50
40
30
20
10
0
-55
50
60
70
80
90 100 110 120
AMBIENT TEMPERATURE (
o
C)
130
140 150
PERCENT OF RATED VALUE
90
90
80
70
60
50
40
30
20
10
0
-55
50
60
70
80
90 100 110 120
AMBIENT TEMPERATURE (
o
C)
130
140 150
Peak Pulse Current Test Waveform
PERCENT OF PEAK VALUE
100
90
0
1
T
1
T
2
Example
8µ
20µ
T
T
1
T
2
TIME
50
µs Current Waveform:
1
2
10
O
1
Figure 2
Packaging
Part Number
20D
Component
Package
20.0
Quantity
200
Packaging
Option
BOX
Packaging Specification
400PCS
Circuit Protection
System
Specifications are subject to change without notice.
Please refer to
http://www.ruilon.com
for current information.
Page:4
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