Metal Oxide Varistors
20D Series
Features
Wide operating voltage (V1mA) range from 18V to 1800V
Fast responding to transient over-voltage
Large absorbing transient energy capability
Low clamping ratio and no follow-on current
Meets MSL level1, per J-STD-020
Operating temperature: -40℃ ~ +85℃
Storage Temperature:-40℃ ~ +125℃
Applications
Transistor, diode, IC, SCR or SCR semiconductor protection
Surge protection in consumer electronics
Surge protection in industrial electronics
Surge protection in electronic home appliances, gas and petroleum appliances
Relay and electromagnetic valve surge absorption
Part Number Code and Marking Code
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掌握芯技术Core Technology
(V2)
Metal Oxide Varistors
20D Series
Dimensions
Item
D
H
H1
L
L1
d
P
T
Dimension
(mm)
20.0~23.0
21.0~26.0
24.0~28.0
≥20.0
≥15.0
1.0±0.05
10.0±1.0
W
Refer to the
following table
Model
T
W
Model
T
W
Model
T
W
180K
2.1~4.3
1.7±0.8
201K
2.5~4.7
2.2±0.8
681K
4.1~7.1
4.4±0.8
220K
2.2~4.4
1.8±0.8
221K
2.6~4.8
2.3±0.8
751K
4.4~7.5
4.5±0.8
270K
2.2~4.6
2.0±0.8
241K
2.7~4.9
2.4±0.8
781K
4.5~7.7
4.6±0.8
330K
2.3~4.8
1.9±0.8
271K
2.7~5.0
2.6±0.8
821K
4.7~7.9
4.8±0.8
390K
2.2~4.5
2.0±0.8
301K
2.8~5.0
2.7±0.8
911K
4.9~8.1
5.2±0.8
470K
2.3~4.7
2.1±0.8
331K
2.8~5.2
2.7±0.8
102K
5.5~8.6
5.2±0.8
560K
2.4~5.0
2.3±0.8
361K
3.0~5.4
2.9±0.8
112K
5.9~9.1
5.6±0.8
680K
2.5~5.3
2.6±0.8
391K
3.1~5.5
3.0±0.8
122K
6.0~9.7
6.0±0.8
820K
2.2~4.5
2.0±0.8
431K
3.3~5.7
3.2±0.8
142K
7.0~11.2
6.8±0.8
101K
2.5~4.6
2.2±0.8
471K
3.4~6.0
3.4±0.8
162K
7.5~11.8
7.6±0.8
121K
2.5~4.8
2.4±0.8
511K
3.5~6.2
3.6±0.8
182K
7.7~12.8
8.4±0.8
151K
2.3~4.5
2.0±0.8
561K
3.7~6.5
3.8±0.8
181K
2.4~4.6
2.1±0.8
621K
3.9~6.8
4.1±0.8
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掌握芯技术Core Technology
(V2)
Metal Oxide Varistors
20D Series
Electrical Characteristics
Model
Varistor
Voltage
Maximum
Allowable
Voltage
Maximum
Clamping
Voltage
Surge
Current
Maximum
Energy
(10/1000μs)
Maximum
Leakage
Current
@83% of V1mA
Rated
Power
Typical
Capacitance
(Reference)
V1mA (V)
VAC (V)
VDC (V)
IP (A)
VC (V)
I (A)
E (J)
IR (μA)
P (W)
@1KHz (pF)
180KD20
18(15~21.6)
11
14
20
36
2000
11
50
0.2
28500
180KD20J
18(15~21.6)
11
14
20
36
3000
13
50
0.2
28500
220KD20
22(19.5~26)
14
18
20
43
2000
14
50
0.2
18500
220KD20J
22(19.5~26)
14
18
20
43
3000
16
50
0.2
18500
270KD20
27(24~31)
17
22
20
53
2000
16
50
0.2
13000
270KD20J
27(24~31)
17
22
20
53
3000
19
50
0.2
13000
330KD20
33(29.5~36.5)
20
26
20
65
2000
23
50
0.2
11500
330KD20J
33(29.5~36.5)
20
26
20
65
3000
24
50
0.2
11500
390KD20
39(35~43)
25
31
20
77
2000
26
50
0.2
8500
390KD20J
39(35~43)
25
31
20
77
3000
28
50
0.2
8500
470KD20
47(42~52)
30
38
20
93
2000
30
50
0.2
7400
470KD20J
47(42~52)
30
38
20
93
3000
34
50
0.2
7400
560KD20
56(50~62)
35
45
20
110
2000
38
50
0.2
6500
560KD20J
56(50~62)
35
45
20
110
3000
44
50
0.2
6500
680KD20
68(61~75)
40
56
20
135
2000
41
50
0.2
5800
680KD20J
68(61~75)
40
56
20
135
3000
49
50
0.2
5800
820KD20
82(74~90)
50
65
100
135
6500
45
25
1.0
4900
820KD20J
82(74~90)
50
65
100
135
10000
56
25
1.0
4900
101KD20
100(90~110)
60
85
100
165
6500
50
25
1.0
4000
101KD20J
100(90~110)
60
85
100
165
10000
70
25
1.0
4000
121KD20
120(108~132)
75
100
100
200
6500
55
25
1.0
3300
121KD20J
120(108~132)
75
100
100
200
10000
85
25
1.0
3300
151KD20
150(135~165)
95
125
100
250
6500
70
25
1.0
2700
151KD20J
150(135~165)
95
125
100
250
10000
106
25
1.0
2700
181KD20
180(162~198)
115
150
100
300
6500
85
25
1.0
2200
181KD20J
180(162~198)
115
150
100
300
10000
130
25
1.0
2200
201KD20
200(180~220)
130
170
100
340
6500
95
25
1.0
2000
201KD20J
200(180~220)
130
170
100
340
10000
140
25
1.0
2000
221KD20
220(198~242)
140
180
100
360
6500
100
25
1.0
1800
221KD20J
220(198~242)
140
180
100
360
10000
155
25
1.0
1800
241KD20
240(216~264)
150
200
100
395
6500
108
25
1.0
1650
241KD20J
240(216~264)
150
200
100
395
10000
168
25
1.0
1650
271KD20
270(243~297)
175
225
100
455
6500
127
25
1.0
1500
271KD20J
270(243~297)
175
225
100
455
10000
190
25
1.0
1500
301KD20
300(270~330)
190
250
100
500
6500
136
25
1.0
1300
301KD20J
300(270~330)
190
250
100
500
10000
210
25
1.0
1300
331KD20
330(297~363)
210
275
100
550
6500
150
25
1.0
1200
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掌握芯技术Core Technology
(V2)
Metal Oxide Varistors
20D Series
Electrical Characteristics
Model
Varistor
Voltage
Maximum
Allowable
Voltage
Maximum
Clamping
Voltage
Surge
Current
Maximum
Energy
(10/1000μs)
Maximum
Leakage
Current
@83% of V1mA
Rated
Power
Typical
Capacitance
(Reference)
V1mA (V)
VAC (V)
VDC (V)
IP (A)
VC (V)
I (A)
E (J)
IR (μA)
P (W)
@1KHz (pF)
331KD20J
330(297~363)
210
275
100
550
10000
228
25
1.0
1200
361KD20
360(324~396)
230
300
100
595
6500
163
25
1.0
1100
361KD20J
360(324~396)
230
300
100
595
10000
255
25
1.0
1100
391KD20
390(351~429)
250
320
100
650
6500
180
25
1.0
1000
391KD20J
390(351~429)
250
320
100
650
10000
275
25
1.0
1000
431KD20
430(387~473)
275
350
100
710
6500
190
25
1.0
930
431KD20J
430(387~473)
275
350
100
710
10000
305
25
1.0
930
471KD20
470(423~517)
300
385
100
775
6500
204
25
1.0
850
471KD20J
470(423~517)
300
385
100
775
10000
350
25
1.0
850
511KD20
510(459~561)
320
415
100
845
6500
210
25
1.0
780
511KD20J
510(459~561)
320
415
100
845
10000
360
25
1.0
780
561KD20
560(504~616)
350
460
100
925
6500
215
25
1.0
710
561KD20J
560(504~616)
350
460
100
925
10000
380
25
1.0
710
621KD20
620(558~682)
385
505
100
1025
6500
224
25
1.0
650
621KD20J
620(558~682)
385
505
100
1025
10000
390
25
1.0
650
681KD20
680(612~748)
420
560
100
1120
6500
230
25
1.0
600
681KD20J
680(612~748)
420
560
100
1120
10000
400
25
1.0
600
751KD20
750(675~825)
460
615
100
1240
6500
255
25
1.0
530
751KD20J
750(675~825)
460
615
100
1240
10000
420
25
1.0
530
781KD20
780(702~858)
485
640
100
1290
6500
265
25
1.0
510
781KD20J
780(702~858)
485
640
100
1290
10000
440
25
1.0
510
821KD20
820(738~902)
510
670
100
1355
6500
282
25
1.0
500
821KD20J
820(738~902)
510
670
100
1355
10000
460
25
1.0
500
911KD20
910(819~1001)
550
745
100
1500
6500
310
25
1.0
440
911KD20J
910(819~1001)
550
745
100
1500
10000
510
25
1.0
440
102KD20
1000(900~1100)
625
825
100
1650
6500
342
25
1.0
400
102KD20J
1000(900~1100)
625
825
100
1650
10000
565
25
1.0
400
112KD20
1100(990~1210)
680
895
100
1815
6500
383
25
1.0
360
112KD20J
1100(990~1210)
680
895
100
1815
10000
620
25
1.0
360
122KD20
1200(1080~1320)
750
990
100
1980
6500
408
25
1.0
350
122KD20J
1200(1080~1320)
750
990
100
1980
10000
660
25
1.0
350
142KD20
1400(1260~1540)
880
1140
100
2310
6500
532
25
1.0
340
142KD20J
1400(1260~1540)
880
1140
100
2310
10000
784
25
1.0
340
162KD20
1600(1440~1760)
1000
1280
100
2640
6500
606
25
1.0
330
162KD20J
1600(1440~1760)
1000
1280
100
2640
10000
896
25
1.0
330
182KD20
1800(1620~1980)
1100
1465
100
2970
6500
625
25
1.0
320
182KD20J
1800(1620~1980)
1100
1465
100
2970
10000
990
25
1.0
320
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掌握芯技术Core Technology
(V2)
Metal Oxide Varistors
20D Series
Electrical Ratings
Items
Varistor Voltage
Test Condition/Description
Requirement
The voltage between two terminals with the specified measuring
current 1mA.DC applied is called Vb.
Maximum
Allowable Voltage
The recommended maximum sine wave voltage (RMS) or the
Maximum DC voltage can be applied continuously.
Maximum
Clamping Voltage
The maximum voltage between two terminals with the specification
standard impulse current.
Applied waveform: 8/20μs
Surge Current
The maximum current within the varistor voltage change of ±10% with
the standard impulse current (8/20μs) applied one time.
Energy
The maximum energy within the varistor voltage change of ±10%
when one impulse of 10/1000μs is applied.
Leakage
Current
The current through the varistor when 0.83V1mA is applied to both end.
Rated
Power
The maximum average power that can be applied within the specified
ambient temperature.
Varistor Voltage
Temp. Coefficient
Surge Life
≤0.05%/℃
The change of V1mA shall be measured after the impulse listed below
which is applied 10,000 times continuously with the interval of ten
seconds at room temperature.
20D series
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To meet the
Specified value
180K to 680K
100A (8/20μs)
820K to 182K
200A (8/20μs)
掌握芯技术Core Technology
|ΔV1mA/V1mA |≤10%
(V2)
Metal Oxide Varistors
20D Series
Mechanical Characteristics and Reliability
Items
Test conditions / Methods
Specifications
Gradually applying the force specified and keeping the unit
fixed for 10±1 sec.
Tensile Strength
of Terminals
Terminal diameter (mm)
Force (kg)
0.5
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