Voltage
Dependent Resistor
压敏电阻
20D Series
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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
Type
Nominal Varistor Voltage
Varistor Voltage
Tolerance
20=20MM
D: Disk
471=47*101V
K = 10 %
S: Square
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Metal Oxide Varistors - 20D Series
Electriacl Characteristics
Type Number
Maximum
Allowable Voltage
Varistor Voltage
Maximum
Clamping
Voltage
VAC(V) VDC(V)
V1mA(V)
IP(A) VC(V)
Standard
High Surge
20D180K
20D180KJ
11
20D220K
20D220KJ
20D270K
20D270KJ
20
36
Withstanding
Surge Current
(J)
Typical
Capacitance
(Reference)
Standard
High Surge
Standard
High Surge
(J)
(W)
@1KHz(pf)
2000
3000
11
13
0.2
28500
I(A)
I(A)
Maximum Energy Rated
(10/1000μs)
Power
14
18(15~21.6)
14
18
22(19.5~26)
20
43
2000
3000
14
16
0.2
18500
17
22
27(24~30)
20
53
2000
3000
16
19
0.2
13000
20K330K
20K330KJ
20
26
33(29.5~36.5)
20
65
2000
3000
23
24
0.2
11500
20D390K
20D390KJ
25
31
39(35~43)
20
77
2000
3000
26
28
0.2
8500
20D470K
20D470KJ
30
38
47(42~54)
20
93
2000
3000
30
34
0.2
7400
20D560K
20D560KJ
35
45
56(50~62)
20
100
2000
3000
41
41
0.2
6500
20D680K
20D680KJ
40
56
68(61~75)
20
135
2000
3000
46
49
0.2
5800
20D820K
20D820KJ
50
65
82(74~90)
100
135
6500
10000
38
56
1.0
4900
20D101K
20D101KJ
60
85
100(90~110)
100
165
6500
10000
45
70
1.0
4000
20D121K
20D121KJ
75
100
120(108~132)
100
200
6500
10000
55
85
1.0
3300
20D151K
20D151KJ
95
125
150(135~165)
100
250
6500
10000
70
106
1.0
2700
20D181K
20D181KJ
115
150
180(162~198)
100
300
6500
10000
85
130
1.0
2200
20D201K
20D201KJ
130
170
200(180~220)
100
340
6500
10000
95
140
1.0
2000
20D221K
20D221KJ
140
180
220(198~242)
100
360
6500
10000
100
155
1.0
1800
20D241K
20D241KJ
150
200
240(216~264)
100
395
6500
10000
108
168
1.0
1650
20D271K
20D271KJ
175
225
270(243~297)
100
455
6500
10000
127
190
1.0
1500
20D301K
20D301KJ
190
250
300(270~330)
100
500
6500
10000
136
210
1.0
1300
20D331K
20D331KJ
210
275
330(297~363)
100
550
6500
10000
150
228
1.0
1200
20D361K
20D361KJ
230
300
360(324~396)
100
595
6500
10000
163
255
1.0
1100
20D391K
20D391KJ
250
320
390(351~429)
100
650
6500
10000
180
275
1.0
1000
20D431K
20D431KJ
275
350
430(387~473)
100
710
6500
10000
190
305
1.0
930
20D471K
20D471KJ
300
385
470(423~517)
100
775
6500
10000
220
350
1.0
850
20D511K
20D511KJ
320
415
510(459~561)
100
845
6500
10000
220
360
1.0
780
20D561K
20D561KJ
350
460
560(504~616)
100
925
6500
10000
220
380
1.0
710
20D621K
20D621KJ
385
505
620(558~682)
100
1025
6500
10000
220
390
1.0
650
20D681K
20D681KJ
420
560
680(612~748)
100
1120
6500
10000
230
400
1.0
600
20D751K
20D751KJ
460
615
750(675~825)
100
1240
6500
10000
255
420
1.0
580
20D781K
20D781KJ
485
640
780(702~858)
100
1290
6500
10000
265
440
1.0
560
20D821K
20D821KJ
510
670
820(738~902)
100
1355
6500
10000
282
460
1.0
525
20D911K
20D911KJ
550
745
910(819~1001)
100
1500
6500
10000
310
510
1.0
495
20D102K
20D102KJ
625
825
1000(900~1100)
100
1650
6500
10000
342
565
1.0
480
20D112K
20D112KJ
680
895
1100(990~1210)
100
1815
6500
10000
383
620
1.0
460
20D122K
20D122KJ
740
975
1200(1080~1320)
100
2010
6500
10000
412
660
1.0
440
20D142K
20D142K
850
1100
1400(1260~1540)
100
2255
6500
10000
470
725
1.0
415
20D152K
20D152K
900
1220
1500(135~1650)
100
2475
6500
10000
529
815
1.0
400
20D162K
20D162KJ
1000
1280
1600(1440~1760)
100
2640
6500
10000
606
896
1.0
330
20D182K
20D182KJ
1000
1465
1800(1620~1980)
100
2970
6500
10000
625
660
1.0
320
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Metal Oxide Varistors - 20D Series
Electrical Rating
ltem
Varistor Voltage
Test Condition / Description
Requirement
The voltage between two terminals with the specified measuring current 1mA.
DC applied is call Vb.
Maximum Allowable
The recommended maximum sine wave voltage (RMS) or the maximum DC
Voltage
voltage can be applied continuously.
Rated Wattaget
IEnergy
The maximum average power that can be applied within the specified ambient
temperature.
To meet
the specified
value
The maximum energy within the varistor voltage change of ±10% when one impulse
of10/1000μsec. or 2 msec. is applied.
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
10A (8/20μsec.)
820K to 751K
20A (8/20μsec.)
180K to 680K
25A (8/20μsec.)
820K to 821K
50A (8/20μsec.)
180K to 680K
50A (8/20μsec.)
820K to 182K
100A (8/20μsec.)
180K to 680K
75A (8/20μsec.)
820K to 182K
150A (8/20μsec.)
180K to 680K
100A (8/20μsec.)
820K to 182K
200A (8/20μsec.)
5D series
7Dseries
Surge Life
Vb
Vb
_
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