CERAMIC SURGE ABSORBERS (VARISTORS)
SVC
SVC CHARACTERISTIC
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
1. High discharge current capability up to 4000 Amps.
2. Excellent clamping characteristics.
3. Fast response time under 50 nanesesconds.
4. Improve product safety
5. UL, CSA, VDE recognized
TYPE DESIGNATION (HOW TO ORDER)
SVC 471 D-14A FF 7
Lead Spacing & Pitch of Component
Basic Type
ZnO Varistor
Varistor Nominal Voltage
(The first two digit indicate significaticant digits)
(The 3rd digit indicate the number of zeros following)
Packing Style & Lead Variation
Classification
A : High Voltage(82V and above)
B : Low Voltage(less then 68V)
Chip Element Size (Dia)
05 : 5mm
14 : 14mm
07 : 7mm
20 : 20mm
10 : 10mm
Lead Variation
S
Straight Type
In-Kink Type
Out-Kink Type
B
Bulk
Packing Style
S
W
K
F
K
L
N
Lead Variation
Straight Long Type
Kink short Type
Kink long Type
Kink short Type
Straight short Type
Style
D : Disk Type Varistor
Packing Style
Taping
F
Type
Flat Pack
Suffix Code
Taping 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
Bulk Type
44
CERAMIC SURGE ABSORBERS (VARISTORS)
SVC
SVC CHARACTERISTIC CURVES
V-Ⅰ CURVE
Small - current region of V -
Ⅰ
curve
Temporary power frequency over voltage capability
B TYPE
Withstand discharge impulse current characteristics (Typical)
A TYPE
Withstand discharge impulse current characteristics (Typical)
45
CERAMIC SURGE ABSORBERS (VARISTORS)
SVC
Device
Type
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
SVC
271D-05A
271D-07A
271D-10A
271D-14A
271D-20A
361D-05A
361D-07A
361D-10A
361D-14A
361D-20A
391D-05A
391D-07A
391D-10A
391D-14A
391D-20A
431D-05A
431D-07A
431D-10A
431D-14A
431D-20A
471D-05A
471D-07A
471D-10A
471D-14A
471D-20A
561D-10A
561D-14A
561D-20A
621D-10A
621D-14A
621D-20A
681D-10A
681D-14A
681D-20A
751D-10A
751D-14A
751D-20A
781D-10A
781D-14A
781D-20A
821D-10A
821D-14A
821D-20A
911D-10A
911D-14A
911D-20A
102D-10A
102D-14A
102D-20A
112D-10A
112D-14A
112D-20A
182D-10A
182D-14A
Dia
(mm)
5
7
10
14
20
5
7
10
14
20
5
7
10
14
20
5
7
10
14
20
5
7
10
14
20
10
14
20
10
14
20
10
14
20
10
14
20
10
14
20
10
14
20
10
14
20
10
14
20
10
14
20
14
20
Vacm
(Volts)
Vdcm
(Volts)
Wtm
(Joules)
6.0
12.0
30.0
50.0
90.0
7.5
15.0
35.0
65.0
120.0
8.0
17.0
40.0
70.0
130.0
9.0
20.0
45.0
75.0
140.0
10.0
20.0
45.0
80.0
150.0
45.0
85.0
150.0
45.0
85.0
150.0
45.0
90.0
160.0
50.0
100.0
175.0
50.0
105.0
180.0
55.0
110.0
190.0
60.0
120.0
215.0
65.0
130.0
230.0
70.0
140.0
250.0
24.0
400.0
Ptam
(Watts)
0.1
0.25
0.4
0.6
1.0
0.1
0.25
0.4
0.6
1.0
0.1
0.25
0.4
0.6
1.0
0.1
0.25
0.4
0.6
1.0
0.1
0.25
0.4
0.6
1.0
0.4
0.6
1.0
0.4
0.6
1.0
0.4
0.6
1.0
0.4
0.6
1.0
0.4
0.6
1.0
0.4
0.6
1.0
0.4
0.6
1.0
0.4
0.6
1.0
0.4
0.6
1.0
0.6
1.0
Itm
(Amps)
250
600
1250
2500
4000
250
600
1250
2500
4000
250
600
1250
2500
4000
250
600
1250
2500
4000
250
600
1250
2500
4000
1250
2500
4000
1250
2500
4000
1250
2500
4000
1250
2500
4000
1250
2500
4000
1250
2500
4000
1250
2500
4000
1250
2500
4000
1250
2500
4000
2500
4000
Vnom
(Volts)
Tolerance
Min
Max
(Volts)
(Volts)
247
303
VC
(Volts)
475
455
455
455
455
620
595
595
595
595
675
650
650
650
650
754
710
710
710
710
810
775
775
775
775
920
920
920
1025
1025
1025
1120
1120
1120
1240
1240
1240
1290
1290
1290
1355
1355
1355
1500
1500
1500
1650
1650
1650
1815
1815
1815
2970
2970
Ip
(Amps)
5
10
25
50
100
5
10
25
50
100
5
10
25
50
100
5
10
25
50
100
5
10
25
50
100
25
50
100
25
50
100
25
50
100
25
50
100
25
50
100
25
50
100
25
50
100
25
50
100
25
50
100
50
100
f=1kHz
(pF)
150
300
600
1200
2400
120
250
500
1000
2000
110
220
450
900
1800
100
200
400
800
1600
80
170
350
700
1400
300
600
1200
270
550
1100
250
500
1000
220
450
900
220
440
880
210
420
840
180
380
750
180
350
700
150
300
600
200
400
175
225
270
230
300
360
324
396
250
320
390
351
429
275
350
430
387
473
300
385
470
423
517
350
460
560
504
616
385
550
620
558
682
420
560
680
612
748
460
615
750
675
825
485
640
780
702
858
510
670
820
738
902
550
745
910
819
1001
625
825
1000
900
1100
680
1000
895
1465
1100
1800
990
1620
1210
1980
Notes :
①The 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
√
2times the Vacm.
②Energy : 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.
③Transient peak current (ltm)
The peak current rating. ltm. 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 twice at 5 mimutes intervals.
④Nominal 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.
⑤Maximum clamping voltage : Vc
Indicates the peak teminal voltage measured with an 8/20㎲ impulse
current applied.
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’ Laboratories, Inc. and
s
Canadian Standards Association
UL File No. E97754, E151195, E154171.
CSA File No. LR78923.
47
分立器件
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
