SVC Series Varistors
Details
    
Introduction
 
SVC series Varistors are gapless ceramic surge absorbers of a new type made of metal oxide which is designed to protect various kinds of electronic devices and semiconducting elements from surges.
 
Features
 
• High discharge current capability up to 4000 Amps.
• Excellent clamping characteristics.
• Fast response time under 50 nanesesconds.
• Improve Product safety
• UL, CSA, VDE recognized
* special specification like a Automobile, Medical, Military, Aviation should be discuss with our sales representatives

 
 
1 Basic Type
 
ZnO Varistor
2 Varistor Nominal Voltage
(The first two digit indicate significaticant digits) (The 3rd digit indicate the number of zeros following)
3 Style
 
D : Disk Type Varistor
 
4 Chip Element Size(Dia)
05 : Ø5mm, 07 : Ø7mm,
10 : Ø10mm, 14 : Ø14mm,
20 :Ø20mm
5 Classification
 
A : High Voltage(82V and above) B : Low Voltage(less then 68V)
6 Packing Style & Lead Variation
 
 
7 Lead Spacing & Pitch of Component

 
Packing Style Lead Variation Packing Style Lead Variation  
 
 
 
F
 
 
 
Taping Type Flat Pack
S Straight Type  
 
 
B
 
 
 
Bulk
S Straight Long Type  
W Kink Short Type  
 
K
 
In-Kink Type
 
K Kink Long Type  
L Kink Short Type  
 
F
 
Out-Kink Type
 
N Straight Short Type  
 
 

Suffix Code
 
Taping Type Bulk Type
Code Lead Spacing(mm) Pitch of Component(mm) Code Lead Spacing(mm)
5 5.0 12.7 5 5.0
7 7.5 15.0 7 7.5
8 7.5 30.0 1 10.0
9 7.5 25.4    
1 10.0 30.0    
 

SVC Characteristic Curves

V - Ⅰ Curve
•Small - current region of V -Ⅰcurve •Temporary power frequency over voltage capability
B Type

Withstand discharge impulse
  current   characteristics(Typical)

 
A Type

•Withstand  discharge  impulse current  characteristics(Typical)
 


 
 
 
 

Device Type
 
Chip Element Size
Maximum Ratings Characteristics
Applied Voltage Transient  
Nominal Varistor
Peak Voltage
 
Max. ClampingVoltage @ Test Current(8/20)
RMS 50/60Hz (25)  
DC (25)
 
Energy
Average Power Dissipation Peak Current (8/20)
Dia (mm) Vacm (Volts) Vdcm (Volts) Wtm (Joules) Ptam (Watts) Itm (Amps) Vnom (Volts) Tolerance Vc (Volts) Ip (Amps)
Min.(Volts) Max.(Volts)
SVC 180D-05B SVC 180D-07B SVC 180D-10B SVC 180D-14B SVC 180D-20B 5
7
10
14
20
 
 
 
11
 
 
 
14
0.3
0.8
1.5
3.5
10.0
0.01
0.02
0.05
0.1
0.2
125
250
500
1000
2000
 
 
 
18
 
 
 
16
 
 
 
20
40
36
36
36
36
1
2.5
5
10
20
SVC 220D-05B SVC 220D-07B SVC 220D-10B SVC 220D-14B SVC 220D-20B 5
7
10
14
20
 
 
14
 
 
18
0.4
0.9
2.0
4.0
13.0
0.01
0.02
0.05
0.1
0.2
125
250
500
1000
2000
 
 
22
 
 
20
 
 
24
48
43
43
43
43
1
2.5
5
10
20
SVC 270D-05B SVC 270D-07B SVC 270D-10B SVC 270D-14B
SVC 270D-20B
5
7
10
14
20
 
 
 
17
 
 
 
22
0.5
1.0
2.5
5.0
15.0
0.01
0.02
0.05
0.1
0.2
125
250
500
1000
2000
 
 
 
27
 
 
 
24
 
 
 
30
60
53
53
54
53
1
2.5
5
10
20
SVC 330D-05B SVC 330D-07B SVC 330D-10B SVC 330D-14B
SVC 330D-20B
5
7
10
14
20
 
 
 
20
 
 
 
26
0.6
1.2
3.0
6.0
20.0
0.01
0.02
0.05
0.1
0.2
125
250
500
1000
2000
 
 
 
33
 
 
 
30
 
 
 
36
73
65
65
65
65
1
2.5
5
10
20
SVC 390D-05B SVC 390D-07B SVC 390D-10B SVC 390D-14B
SVC 390D-20B
5
7
10
14
20
 
 
 
25
 
 
 
31
0.8
1.5
3.5
7.0
24.0
0.01
0.02
0.05
0.1
0.2
125
250
500
1000
2000
 
 
 
39
 
 
 
35
 
 
 
43
86
77
77
77
77
1
2.5
5
10
20
SVC 470D-05B SVC 470D-07B SVC 470D-10B SVC 470D-14B
SVC 470D-20B
5
7
10
14
20
 
 
 
30
 
 
 
38
1.0
1.8
4.5
8.5
30.0
0.01
0.02
0.05
0.1
0.2
125
250
500
1000
2000
 
 
 
47
 
 
 
42
 
 
 
52
104
93
93
93
93
1
2.5
5
10
20
SVC 560D-05B SVC 560D-07B SVC 560D-10B SVC 560D-14B
SVC 560D-20B
5
7
10
14
20
 
 
 
35
 
 
 
45
1.0
2.2
5.5
10.5
35.0
0.01
0.02
0.05
0.1
0.2
125
250
500
1000
2000
 
 
 
56
 
 
 
50
 
 
 
62
123
110
110
110
110
1
2.5
5
10
20
SVC 680D-05B SVC 680D-07B SVC 680D-10B SVC 680D-14B
SVC 680D-20B
5
7
10
14
20
 
 
 
40
 
 
 
56
1.2
2.5
6.5
12.0
40.0
0.01
0.02
0.05
0.1
0.2
125
250
500
1000
2000
 
 
 
68
 
 
 
61
 
 
 
75
150
135
135
135
135
1
2.5
5
10
20
SVC 820D-05A SVC 820D-07A SVC 820D-10A SVC 820D-14A SVC 820D-20A 5
7
10
14
20
 
 
 
50
 
 
 
65
1.7
3.5
8.0
14.0
27.0
0.1
0.25
0.4
0.6
1.0
400
1200
2500
4500
6500
 
 
 
82
 
 
 
74
 
 
 
90
145
135
135
135
135
5
10
25
50
100
SVC 101D-05A SVC 101D-07A SVC 101D-10A SVC 101D-14A
SVC 101D-20A
5
7
10
14
20
 
 
 
60
 
 
 
85
2.0
4.0
10.0
18.0
30.0
0.1
0.25
0.4
0.6
1.0
400
1200
2500
4500
6500
 
 
 
100
 
 
 
90
 
 
 
110
175
165
165
165
165
5
10
25
50
100
 
 
 
 
 
 
 
Device Type
 
Chip Element Size
Maximum Ratings Characteristics
Applied Voltage Transient  
Nominal Varistor
Peak Voltage
 
Max. ClampingVoltage @ Test Current(8/20)
RMS 50/60Hz (25)  
DC (25)
 
Energy
Average Power Dissipation Peak Current (8/20)
Dia (mm) Vacm (Volts) Vdcm (Volts) Wtm (Joules) Ptam (Watts) Itm (Amps) Vnom (Volts) Tolerance Vc (Volts) Ip (Amps)
Min.(Volts) Max.(Volts)
SVC 121D-05A SVC 121D-07A SVC 121D-10A SVC 121D-14A SVC 121D-20A 5
7
10
14
20
 
 
 
75
 
 
 
100
2.5
5.0
12.0
20.0
40.0
0.1
0.25
0.4
0.6
1.0
400
1200
2500
4500
6500
 
 
 
120
 
 
 
108
 
 
 
132
210
200
200
200
200
5
10
25
50
100
SVC 151D-05A SVC 151D-07A SVC 151D-10A SVC 151D-14A SVC 151D-20A 5
7
10
14
20
 
 
95
 
 
125
3.0
6.0
16.0
25.0
50.0
0.1
0.25
0.4
0.6
1.0
400
1200
2500
4500
6500
 
 
150
 
 
135
 
 
165
260
250
250
250
250
5
10
25
50
100
SVC 201D-05A SVC 201D-07A SVC 201D-10A SVC 201D-14A
SVC 201D-20A
5
7
10
14
20
 
 
 
130
 
 
 
170
4.0
10.0
20.0
35.0
70.0
0.1
0.25
0.4
0.6
1.0
400
1200
2500
4500
6500
 
 
 
200
 
 
 
185
 
 
 
225
355
340
340
340
340
5
10
25
50
100
SVC 221D-05A SVC 221D-07A SVC 221D-10A SVC 221D-14A
SVC 221D-20A
5
7
10
14
20
 
 
 
140
 
 
 
180
4.5
10.0
23.0
40.0
75.0
0.1
0.25
0.4
0.6
1.0
400
1200
2500
4500
6500
 
 
 
220
 
 
 
198
 
 
 
242
380
360
360
360
360
5
10
25
50
100
SVC 241D-05A SVC 241D-07A SVC 241D-10A SVC 241D-14A
SVC 241D-20A
5
7
10
14
20
 
 
 
150
 
 
 
200
5.0
10.0
25.0
40.0
80.0
0.1
0.25
0.4
0.6
1.0
400
1200
2500
4500
6500
 
 
 
240
 
 
 
216
 
 
 
264
415
395
395
395
395
5
10
25
50
100
SVC 271D-05A SVC 271D-07A SVC 271D-10A SVC 271D-14A
SVC 271D-20A
5
7
10
14
20
 
 
 
175
 
 
 
225
6.0
12.0
30.0
50.0
90.0
0.1
0.25
0.4
0.6
1.0
400
1200
2500
4500
6500
 
 
 
270
 
 
 
247
 
 
 
303
475
455
455
455
455
5
10
25
50
100
SVC 361D-07A SVC 361D-10A SVC 361D-14A
SVC 361D-20A
5
7
10
14
20
 
 
 
230
 
 
 
300
7.5
15.0
35.0
65.0
120.0
0.1
0.25
0.4
0.6
1.0
400
1200
2500
4500
6500
 
 
 
360
 
 
 
324
 
 
 
396
620
595
595
595
595
5
10
25
50
100
SVC 391D-05A SVC 391D-07A SVC 391D-10A SVC 391D-14A
SVC 391D-20A
5
7
10
14
20
 
 
 
250
 
 
 
320
8.0
17.0
40.0
70.0
130.0
0.1
0.25
0.4
0.6
1.0
400
1200
2500
4500
6500
 
 
 
390
 
 
 
351
 
 
 
429
675
650
650
650
650
2.55
10
25
50
100
SVC 431D-05A SVC 431D-07A SVC 431D-10A SVC 431D-14A SVC 431D-20A 5
7
10
14
20
 
 
 
275
 
 
 
350
9.0
20.0
45.0
75.0
140.0
0.1
0.25
0.4
0.6
1.0
400
1200
2500
4500
6500
 
 
 
430
 
 
 
387
 
 
 
473
754
710
710
710
710
5
10
25
50
100
SVC 471D-05A SVC 471D-07A SVC 471D-10A SVC 471D-14A
SVC 471D-20A
5
7
10
14
20
 
 
 
300
 
 
 
385
10.0
20.0
45.0
80.0
150.0
0.1
0.25
0.4
0.6
1.0
400
1200
2500
4500
6500
 
 
 
470
 
 
 
423
 
 
 
517
810
775
775
775
775
5
10
25
50
100
 
 


 
 
 
 
 

Device Type
 
Chip Element Size
Maximum Ratings Characteristics
Applied Voltage Transient  
Nominal Varistor
Peak Voltage
 
Max. ClampingVoltage @ Test Current(8/20)
RMS 50/60Hz (25)  
DC (25)
 
Energy
Average Power Dissipation Peak Current (8/20)
Dia (mm) Vacm (Volts) Vdcm (Volts) Wtm (Joules) Ptam (Watts) Itm (Amps) Vnom (Volts) Tolerance Vc (Volts) Ip (Amps)
Min.(Volts) Max.(Volts)
SVC 561D-10A SVC 561D-14A SVC 561D-20A 10
14
20
 
350
 
460
45.0
85.0
150.0
0.4
0.6
1.0
2500
4500
8000
 
560
 
504
 
616
920
920
920
25
50
100
SVC 621D-10A SVC 621D-14A
SVC 621D-20A
10
14
20
 
385
 
550
45.0
85.0
150.0
0.4
0.6
1.0
2500
4500
8000
 
620
 
558
 
682
1025
1025
1025
25
50
100
SVC 681D-10A SVC 681D-14A SVC 681D-20A 10
14
20
 
420
 
560
45.0
90.0
160.0
0.4
0.6
1.0
2500
4500
8000
 
680
 
612
 
748
1120
1120
1120
25
50
100
SVC 751D-10A SVC 751D-14A SVC 751D-20A 10
14
20
 
460
 
615
50.0
100.0
175.0
0.4
0.6
1.0
2500
4500
8000
 
750
 
675
 
825
1240
1240
1240
25
50
100
SVC 781D-10A
SVC 781D-14A SVC 781D-20A
10
14
20
 
485
 
640
50.0
105.0
180.0
0.4
0.6
1.0
2500
4500
6500
 
780
 
702
 
858
1290
1290
1290
25
50
100
SVC 821D-10A SVC 821D-14A
SVC 821D-20A
10
14
20
 
510
 
670
55.0
110.0
190.0
0.4
0.6
1.0
2500
4500
6500
 
820
 
738
 
902
1355
1355
1355
25
50
100
SVC 911D-10A SVC 911D-14A SVC 911D-20A 10
14
20
 
550
 
745
60.0
120.0
215.0
0.4
0.6
1.0
2500
4500
6500
 
910
 
819
 
1001
1500
1500
1500
25
50
100
SVC 102D-10A SVC 102D-14A
SVC 102D-20A
10
14
20
 
625
 
825
65.0
130.0
230.0
0.4
0.6
1.0
2500
4500
6500
 
1000
 
900
 
1100
1650
1650
1650
25
50
100
SVC 112D-10A SVC 112D-14A SVC 112D-20A 10
14
20
 
680
 
895
70.0
140.0
250.0
0.4
0.6
1.0
2500
4500
6500
 
1100
 
990
 
1210
1815
1815
1815
25
50
100
SVC 182D-14A
SVC 182D-20A
14
20
 
1000
 
1465
24.0
400.0
0.6
1.0
4500
6500
 
1800
 
1620
 
1980
2970
2970
50
100
   
                         


 
 
① The waveform of the maximum DC applied voltage is flat.
When a ripple voltage as from a rectifier source is supplied make sure that the peak voltage is kept under th Vdcm An AC applied voltage(50/60Hz) form a since waveshape. When the distortion in the waveform is extensive make sure that the peak voltage is less than      times the Vacm.
④ Nominal varistor voltage : Vnom
Indicates the varistor terminal voltage measured with a 1mA DC applied. -0.1mA DC in the case of the 0.5A and 05B series.
② Energy : Wtm
Transient energy ratings are given in the Wtm column of the specifications in Joules(watt-second). The rating is the maximum allowable energy for a single impulse of 2ms square-waveform current with continuous voltage applied. Energy ratings are based on a shift of Vnom of less than
±10% of initial value.
⑤ Maximum clamping voltage : Vc
Indicates the peak teminal voltage measured with an 8/20㎲ impulse current applied.
③ Transient peak current(Itm)
The peak current rating. Itm. of varistor is based on an 8/20
㎲ test impulse waveshape. This peak current is the maximum peak current in which the nominal varistor voltage shift does not exceed ±10% when the test impulse is applied once at 5 mimutes intervals.
•Operating ambient temperature : -40℃  to +80℃
•Storage temperature : -40℃  to +125℃
•UL and CSA recognized(UL 1449, UL 497B or UL 1414, CSA)
SVC varistors have been tested by Underwiter’s Laboratories, Inc. and Canadian Standards Association
UL File No. E97754, E151195, E154171. CSA File No. LR78923.

 
Dimensions
 
A Type
Type T Max.   D Max.    H Max.  L Min. F Ød
SVC 471D-05A 6 7 10 25 5 0.5
SVC 820D-07A 4.5 9 12 25 5 0.5
SVC 101D-07A 4.5 9 12 25 5 0.5
SVC 121D-07A 4.5 9 12 25 5 0.5
SVC 151D-07A 4.5 9 12 25 5 0.5
SVC 201D-07A 4.5 9 12 25 5 0.5
SVC 221D-07A 4.5 9 12 25 5 0.5
SVC 241D-07A 4.5 9 12 25 5 0.5
SVC 271D-07A 4.5 9 12 25 5 0.5
SVC 361D-07A 5 9 12 25 5 0.5
SVC 391D-07A 5 9 12 25 5 0.5
SVC 431D-07A 6 9 12 25 5 0.5
SVC 471D-07A 6 9 12 25 5 0.5
SVC 820D-10A 4.5 14 17 25 7.5 0.7
SVC 101D-10A 4.5 14 17 25 7.5 0.7
SVC 121D-10A 4.5 14 17 25 7.5 0.7
SVC 151D-10A 4.5 14 17 25 7.5 0.7
SVC 201D-10A 4.5 14 17 25 7.5 0.7
SVC 221D-10A 4.5 14 17 25 7.5 0.7
SVC 241D-10A 4.5 14 17 25 7.5 0.7
SVC 271D-10A 4.5 14 17 25 7.5 0.7
SVC 361D-10A 5 14 17 25 7.5 0.7
SVC 391D-10A 5 14 17 25 7.5 0.7
SVC 431D-10A 6 14 17 25 7.5 0.7
SVC 561D-10A 7.5 14 17 25 7.5 0.7
SVC 621D-10A 7.5 14 17 25 7.5 0.7
SVC 681D-10A 7.5 14 17 25 7.5 0.7
SVC 751D-10A 8.5 14 17 25 7.5 0.7
SVC 781D-10A 8.5 14 17 25 7.5 0.7
SVC 821D-10A 8.5 14 17 25 7.5 0.7
SVC 911D-10A 10.5 14 17 25 7.5 0.7
SVC 102D-10A 10.5 14 17 25 7.5 0.7
SVC 112D-10A 10.5 14 17 25 7.5 0.7
SVC 820D-14A 4.5 17.5 21 25 7.5 0.7
SVC 101D-14A 4.5 17.5 21 25 7.5 0.7
SVC 121D-14A 4.5 17.5 21 25 7.5 0.7
SVC 151D-14A 4.5 17.5 21 25 7.5 0.7
SVC 201D-14A 4.5 17.5 21 25 7.5 0.7
SVC 221D-14A 4.5 17.5 21 25 7.5 0.7
SVC 241D-14A 4.5 17.5 21 25 7.5 0.7
SVC 271D-14A 4.5 17.5 21 25 7.5 0.7
SVC 361D-14A 5 17.5 21 25 7.5 0.7
SVC 391D-14A 5 17.5 21 25 7.5 0.7
SVC 431D-14A 6 17.5 21 25 7.5 0.7
SVC 471D-14A 6 17.5 21 25 7.5 0.7
SVC 561D-14A 7.5 17.5 21 25 7.5 0.7
SVC 621D-14A 7.5 17.5 21 25 7.5 0.7
SVC 681D-14A 7.5 17.5 21 25 7.5 0.7
SVC 751D-14A 8.5 17.5 21 25 7.5 0.7
SVC 781D-14A 8.5 17.5 21 25 7.5 0.7
SVC 821D-14A 8.5 17.5 21 25 7.5 0.7
SVC 911D-14A 10.5 17.5 21 25 7.5 0.7
SVC 102D-14A 10.5 17.5 21 25 7.5 0.7
SVC 112D-14A 10.5 17.5 21 25 7.5 0.7
SVC 182D-14A 15 17.5 21 25 7.5 0.7
SVC 820D-20A 4.5 23 28 30 10 0.7
SVC 101D-20A 4.5 23 28 30 10 0.7
SVC 121D-20A 4.5 23 28 30 10 0.7
SVC 151D-20A 4.5 23 28 30 10 0.7
SVC 201D-20A 4.5 23 28 30 10 0.7
SVC 221D-20A 4.5 23 28 30 10 0.7
SVC 241D-20A 4.5 24 28 30 10 0.7
SVC 271D-20A 4.5 24 28 30 10 0.7
SVC 361D-20A 5 24 28 30 10 0.7
SVC 391D-20A 5 24 28 30 10 0.7
SVC 431D-20A 6 24 28 30 10 0.7
SVC 471D-20A 6 24 28 30 10 0.7
SVC 561D-20A 7.5 24 28 30 10 0.8
SVC 621D-20A 7.5 24 28 30 10 0.8
SVC 681D-20A 7.5 24 28 30 10 0.8
SVC 751D-20A 8.5 24 28 30 10 0.8
SVC 781D-20A 8.5 24 28 30 10 0.8
SVC 821D-20A 8.5 24 28 30 10 0.8
SVC 911D-20A 10.5 24 28 30 10 0.8
SVC 102D-20A 10.5 24 28 30 10 0.8
SVC 112D-20A 10 24 28 30 10 0.8
SVC 182D-20A 15 24 28 30 10 0.8

B Type

Type T Max.   D Max.  H Max.   L Min. F Ød
SVC 180D-05B 4.5 7.5 10 25 5 0.5
SVC 220D-05B 4.5 7.5 10 25 5 0.5
SVC 270D-05B 4.5 7.5 10 25 5 0.5
SVC 330D-05B 4.5 7.5 10 25 5 0.5
SVC 390D-05B 4.5 7.5 10 25 5 0.5
SVC 470D-05B 4.5 7.5 10 25 5 0.5
SVC 560D-05B 4.5 7.5 10 25 5 0.5
SVC 680D-05B 4.5 7.5 10 25 5 0.5
SVC 180D-07D 4.5 9 10 25 5 0.5
SVC 220D-07D 4.5 9 10 25 5 0.5
SVC 270D-07D 4.5 9 10 25 5 0.5
SVC 330D-07D 4.5 9 10 25 5 0.5
SVC 390D-07D 4.5 9 10 25 5 0.5
SVC 470D-07D 4.5 9 10 25 5 0.5
SVC 560D-07D 4.5 9 10 25 5 0.5
SVC 680D-07D 4.5 9 10 25 5 0.5
SVC 180D-10B 5 13.5 16.5 25 7.5 0.7
SVC 220D-10B 5 13.5 16.5 25 7.5 0.7
SVC 270D-10B 5 13.5 16.5 25 7.5 0.7
SVC 330D-10B 5 13.5 16.5 25 7.5 0.7
SVC 390D-10B 5 13.5 16.5 25 7.5 0.7
SVC 470D-10B 5 13.5 16.5 25 7.5 0.7
SVC 560D-10B 5 13.5 16.5 25 7.5 0.7
SVC 680D-10B 5 13.5 16.5 25 7.5 0.7
SVC 180D-14B 5 17 20 25 7.5 0.7
SVC 220D-14B 5 17 20 25 7.5 0.7
SVC 270D-14B 5 17 20 25 7.5 0.7
SVC 330D-14B 5 17 20 25 7.5 0.7
SVC 390D-14B 5 17 20 25 7.5 0.7
SVC 470D-14B 5 17 20 25 7.5 0.7
SVC 560D-14B 5 17 20 25 7.5 0.7
SVC 680D-14B 5 17 20 25 7.5 0.7
SVC 180D-20B 6 23 27 30 10 0.8
SVC 220D-20B 6 23 27 30 10 0.8
SVC 270D-20B 6 23 27 30 10 0.8
SVC 330D-20B 6 23 27 30 10 0.8
SVC 390D-20B 6 23 27 30 10 0.8
SVC 470D-20B 6 23 27 30 10 0.8
SVC 560D-20B 6 23 27 30 10 0.8
SVC 680D-20B 6 23 27 30 10 0.8
Type T Max.   D Max.   H Max.  L Min. F Ød
SVC 820D-05A 4.5 7 10 25 5 0.5
SVC 101D-05A 4.5 7 10 25 5 0.5
SVC 121D-05A 4.5 7 10 25 5 0.5
SVC 151D-05A 4.5 7 10 25 5 0.5
SVC 201D-05A 4.5 7 10 25 5 0.5
SVC 221D-05A 4.5 7 10 25 5 0.5
SVC 241D-05A 4.5 7 10 25 5 0.5
SVC 271D-05A 4.5 7 10 25 5 0.5
SVC 361D-05A 5 7 10 25 5 0.5
SVC 391D-05A 5 7 10 25 5 0.5
SVC 431D-05A 6 7 10 25 5 0.5
 
FS5 Type FK5 Type FF9 Type
FF7 Type FF8 Type  
 
 
 

Char, Curves and Lifetime

Transient V-I Charactic Curves
 
Current waveform under 10-2 A : DC
over 10-1   A : 8/20㎲

 
Pulse Lifetime Ratings
 
Notes : 2-pulse : 5-minute interval
3 to 10-pulse : 2-minute interval
Up to 106  - pulse : 10-second interval

 
05B(SVC 180D-05B to SVC 680D-05B) 05B(SVC 180D-05B to SVC 680D-05B)
05A(SVC 820D-05A to SVC 471D-05A) 05A(SVC 820D-05A to SVC 471D-05A)
Transient V-I Characteristic Curves
 
Current waveform under 10-2 A : DC
over 10-1   A : 8/20㎲

 
Pulse Lifetime Ratings
 
Notes : 2-pulse : 5-minute interval
3 to 10-pulse : 2-minute interval
Up to 106-pulse : 10-second interval

 
7B(SVC 180D-07B to SVC 680D-07B) 07B(SVC 180D-07B to SVC 680D-07B)
07A(SVC 820D-07A to SVC 471D-07A) 07A(SVC 820D-07A to SVC 471D-07A)
Transient V-I Characteristic Curves
 
Current waveform under 10-2 A : DC
over 10-1   A : 8/20㎲

 
Pulse Lifetime Ratings
 
Notes : 2-pulse : 5-minute interval
3 to 10-pulse : 2-minute interval
Up to 106-pulse : 10-second interval

 
10B(SVC 180D-10B to SVC 680D-10B) 10B(SVC 180D-10B to SVC 680D-10B)
10A(SVC 820D-10A to SVC 471D-10A) 10A(SVC 820D-10A to SVC 471D-10A)
Transient V-I Characteristic Curves
 
Current waveform under 10-2 A : DC
over 10-1   A : 8/20㎲
Pulse Lifetime Ratings
 
Notes : 2-pulse : 5-minute interval
3 to 10-pulse : 2-minute interval
Up to 106-pulse : 10-second interval

 
10A(SVC 561D-10A to SVC 112D-10A) 10A(SVC 561D-10A to SVC 112D-10A)
14B(SVC 180D-14B to ENC 680D-14B) 14B(SVC 180D-14B to SVC 680D-14B)
Transient V-I Characteristic Curves
 
Current waveform under 10-2 A : DC
over 10-1   A : 8/20㎲

 
Pulse Lifetime Ratings
 
Notes : 2-pulse : 5-minute interval
3 to 10-pulse : 2-minute interval
Up to 106-pulse : 10-second interval
4A(SVC 820D-14A to SVC 471D-14A) 14A(SVC 820D-14A to SVC 471D-14A)
14A(SVC 561D-14A to SVC 182D-14A) 14A(SVC 561D-14A to SVC 182D-14A)
Transient V-I Characteristic Curves
 
Current waveform under 10-2 A : DC
over 10-1   A : 8/20㎲
Pulse Lifetime Ratings
 
Notes : 2-pulse : 5-minute interval
3 to 10-pulse : 2-minute interval
Up to 106-pulse : 10-second interval

 
20B(SVC 180D-20B to SVC 680D-20B) 20B(SVC 180D-20B to SVC 680D-20B)
20A(SVC 820D-20A to SVC 471D-20A)

20A(SVC 820D-20A to SVC 471D-20A)

Transient V-I Characteristic Curves
 
Current waveform under 10-2 A : DC
over 10-1   A : 8/20㎲
Pulse Lifetime Ratings
 
Notes : 2-pulse : 5-minute interval
3 to 10-pulse : 2- minute interval
Up to 106  -pulse : 10-second interval
0A(SVC 561D-20A to SVC 182D-20A) 20A(SVC 561D-20A to SVC 182D-20A)

Applications
 
• The Protection of semiconducting elements such as diodes, thyristors, transistors, IC and relays against transient Voltages.
• Similar protection of many types of measuring instruments, control machinery and communication equipment and broadcasting equipment against inductive lightning and switching surges.
• Protection of general purpose electrical equipment, domestic mechinery and appliances. TV and radios and similar consumer products against lightning and switching surges.

 
Line and groud circuit
Varistor voltage selection table(ZE)
Power Supply Voltage Type
100V AC SVC431D -□□A
200V AC

SVC471D -□□A

SVC751D -□□A to SVC112D -□□A*

SVC182D -□□A**
Notes :
① When subjected to megger testing(500V DC), the insulation resistance value can decrease due to the leakage current of the SVC, To avoid this remove the varistor or use* marked SVC.
② When subjected to dielectric strength test(1000V AC). remove the SVC or use** marked SVC.
Select varistors taking a note of operating conditions peculiar to the equipment.
AC/DC
single-phase circuit
AC
three-phase circuit

Power Supply Circuit Protection

Line circuit
Varistor voltage selection table (ZL)
Power Supply Voltage Type
100VAC SVC201D -□□A
SVC221D -□□A
SVC241D -□□A
SVC271D -□□A*

 
200VAC SVC391D -□□A
SVC431D -□□A
SVC471D -□□A*
12V DC SVC220D -□□B
24V DC SVC390D -□□B

Notes :
① The power supply voltage must not exceed the maximum allowable circuit voltage.
② Since independent wiring loads and capacitive loads cause the voltage build-up at the time of opening or closing the load, use SVC having a varistor voltage as high as possible.(*mark)
③ The bold faced portions of the type letters vary.

 

Single-phase circuit

AC three-phase circuit


Telecommunication Circuit Protection


Varistor voltage selection guied
Power Supply Voltage Type
12V DC

SVC180D -□□B

SVC220D -□□B SVC820D -□□A
24V AC

SVC390D -□□B

SVC820D -□□A
Notes :
 
The varistor SVC has a capacitance value. Take not of this when applying them to high-frequency signal circuits.

① Connect the SVC at a position nearer to the equipment than the  overcurrent  protection  device“Ⅰ”(fuse,  MCCB)  as  is shown in the diagram. When the SVC is shorted, the overcurrent protection device
“Ⅰ”operates (trips or blow off the fuse).

② If the overcurrent protection device“Ⅰ”can not be installed in“Ⅰ”position, connect a fuse a “t Ⅱ”position. Select fuse rated current for the SVC referring to the following table.
SVC 05A 07A 10A 14A 20A
05B 07B 10B 14B 20B
Applicable fuse rated current(A) 1 to 2 2 to 3 3 to 5 3 to 10 5 to 15

③ When“Z2”SVC is connected between the equipment and ground install an ELCB (Earth Leakage Circuit Breaker). If not possible, connect a fuse or thermal fuse at“Ⅲ”position.

Installation
① When operated  at location  near heating  element or exposed to direct sun light, confirm that the ambient temparature range.
② When operated in dusty or dirty locations, or exposed to corrosive atomospheres, or where metallic powders or salt can be expected, be sure to mount within a protective enclosure.
 
Molding
When shielding the SVC in a resin molding, take a note of the materials used and temperature, since they influence the reliability. For further information please contact SAMWHA


Current, power and energy rating vs, temperature

Electrical Characteristics

Operating ambient temperature

-40℃ to +85℃

Storage temperature

-40℃ to +125℃

Voltage temperatur coefficient

-0.05% ℃

Insulation resistance(at500V)

Over 1000MΩ

 

Switching Circuit Protection
 

Protection of relay (Contact coil) Protection of semiconductors

Varistor voltage selection guide
 

Power Supply Voltage

Type

12V DC

SVC220D -□□B

24V DC

SVC390D -□□B

100V DC

SVC151D -□□A

 

 

100V AC

SVC201D -□□A
SVC221D -□□A
SVC241D -□□A
SVC271D -□□A


Notes :
① The power supply voltage must not exceed the maximum allowable circuit voltage of the SVC
② Pay due attention to the surge energy generated by the load.
③ Select SVC referring to the pulse lifetime rating.
④ To further reduce the tendency of sparking across the contacts connect a capacitors parallel with the SVC. This will also protect the equipment from electromagnetic wave jamming.

 

Application Notes

Overcurrent protection
 
When surges exceed the rating for the SVC, short-circuits or damages can be expected. Take following precautions.



Recognized standards
 

Standard

Content

Applicable SVC series

File No.

 

 

 

 

UL

 

 

UL 1449 3rd edition

 

Surge-protective Devices - Component

 

Other SPD Applications : 05/07/10 Series,

14B/20B Series

 

Type 3 SPD Applications : 14A/20A Series

 

 

E332621

 

UL 497B

 

Component-Isolated  Loop Circuit Protectors

 

SVC 180D - □~ SVC821D -□

 

E154171

 

 

VDE

 

IEC61051-1:2007-04 IEC61051-2:1991-01 IEC61051-2-2:1991-01

 

 

Varistor

 

 

05/07/10/14 Series

 

 

116012

 

 

CAS

 

 

CLASS 2221 01

 

AUDIO AND VIDEO

EQUIPMENT - Accessories and Parts for Electronic Equipment

 

 

SVC201D - □ ~SVC182D - □

 

 

1577876



Application Example
 
Fire Alarm System
Stove, Boiler
Traffic Signal Control
Vending Machine
Solenoid
Brake, Clutch
Contect Protection
Microwave Oven
Thytister Protection
Triac Protection

 
TV Booster
Sound Output Circuit
 

Varistor Terminology

Varistor Voltage : Vnom

Clamping Voltage : Vc

Varistor peak terminal voltage measured with a specified current applied The DC current applied is 1mA normally.
Typical values measured at a test frequency of 1kHz
Maximum terminal voltage (peak voltage across the varistor) measured with an applied 8/20㎲ impulse of a given peak current
Rated peak transient current : itm
Maximum peak current through the varistor with line voltage applied.
The maximum peak current with in the varistor voltage change ratio of ±10% with the standard 8/20㎲ impulse current applied two times at 5 minute interval
Test current waveform
Characteristics tests for Varistors are carried out by using 8/20㎲ test impulses Data such as the maximum clamping voltage(Vc)and the transient peak current(Itm) are obtained by using this impulse current
However, for the Vc characteristics of the Axial Package type a 10mA DC squarewave current is used to cary out the test.
Rated transient energy : Wtm
Maximum allowable energy for a single impulse of 2ms square-wave current waveform with rated continuous voltage applied. Maximum energy rating base on a shift of Vnom of less than ±10% of initial value.
Pulse lifetime rating
This is expressed as the maximum allowable number of impulse currents applied.
8/20㎲ impulse current(or 2ms square wave) is applied at prescribed interval.
This curve also provides for derating current as required with repetitive pulsing.
Rated RMS Voltage : Vacm
Maximum continuous sinusoidal RMS voltage at 50/60Hz which may be applied.
 
Rated DC Voltage : Vdcm
Maximum continuous DC voltage which may be applied.
 
 
Rated average power dissipation : Ptam
Maximum average power that can be applied within the specified ambient temperature.