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PDF 08CH470K Data sheet ( Hoja de datos )

Número de pieza 08CH470K
Descripción SMD Transient Voltage Suppressors
Fabricantes SFI 
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SMD Transient Voltage Suppressors
Table of contents
Table of Contents…………………………………………..……… 1-1
Introduction…………………………………………………..….. 2-2
Transient Voltage Suppressors…………………………………. 3-3
Information for Designer…………………………………………. 4-5
Multilayer varistor introduction …………………….….……… 6-6
Part number identification ………………………………… 7-7
ML - A Series High surge protection………………………….. 8-8
ML - C Series Classification…….………………………………. 9-11
CH Series………………..………………………………….……… 12-12
ESD solution protection varistor…………………………. 13-13
Array Varistor…………………………………………………
14-14
MOV Disc Varistor protection……………………………….. 15-15
New development item
16-16
Package information…………………………………………….. 17-17
Typical application ………………………………………………. 18-18
Test information………………………………………….………. 19-19
Reliability experiment……………………………………………. 20-20
Recommendation for soldering……………………………….. 21-22
Cross reference ……………………………………………..
23-24
1
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08CH470K pdf
SMD Transient Voltage Suppressors
Information for Designer
When selecting the TVS for designing within the circuit, some characteristic parameter should
be considered carefully to meet the circuit condition. The following guideline are recommended.
1. The surge handling ability of the selected TVS should meet the need of dissipating the
expected transient surge current of the protected circuit.
2. The clamping voltage of the selected TVS should be less than the maximum allowed
operating voltage of the protected circuit.
3. In high speed data transmission situation. the capacitance of the selected TVS should be
considered.
4. The special requests of the TVS’s capacitance such as ESD prevention are available, please
contact with us.
5. While choosing the TVS, the working voltage of the TVS should be greater than or equal to
the normal operating voltage of the circuit.
INPUT
OUTPUT
System
to be
Protected
Overvoltage
System Max. allowed
operating voltage
Clamping Voltage Level
System Rated Voltage
INPUT
OUTPUT
6. Protection Principle : When the voltage increase above the threshold of the varistor, the suppressor
draws a rapidly increasing current. The the overvoltage is considerably attenuated.
Transient
Clamping
Vc Transient voltage
Transient Current
Protected
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08CH470K arduino
SMD Transient Voltage Suppressors
Surface Mount Multi layer C Series
SFI Model
Number
Working
Voltage
(MAX)
Breakdown
Voltage
Peak Clamping Energy
Typical
Current Voltage Absorption Capacitance
(MAX)
(MAX)
(MAX)
Unit
Condition
AC DC
VRMS) (V
1mA
(V)
SFI1812ML120C 6
9 12(10.2~13.8)
SFI1812ML150C 8
11 15(12.75~17.25)
SFI1812ML180C 11
14 18(15.3~20.7)
SFI1812ML240C 14
18 24(21.6~26.4)
SFI1812ML270C 17
22 27(24.3~29.7)
SFI1812ML330C 20
26 33(29.7~36.3)
SFI1812ML390C 25
30 39(35.1~42.9)
SFI1812ML470C 30
38 47(42.3~51.7)
SFI1812ML560C 35
45 56(50.4~61.6)
SFI1812ML680C 40
56 68(61.2~74.8)
SFI1812ML820C 50
65 82(73.8~90.2)
SFI2220ML120C 6
9 12(10.2~13.8)
SFI2220ML150C 8
11 15(12.75~17.25)
SFI2220ML180C 11
14 18(15.3~20.7)
SFI2220ML240C 14
18 24(21.6~26.4)
SFI2220ML270C 17
22 27(24.3~29.7)
SFI2220ML330C 20
26 33(29.7~36.3)
SFI2220ML390C 25
30 39(35.1~42.9)
SFI2220ML470C 30
38 47(42.3~51.7)
SFI2220ML560C 35
45 56(50.4~61.6)
SFI2220ML680C 40
56 68(61.2~74.8)
SFI2220ML820C 50
65 82(73.8~90.2)
8/20µs
(A)
500
500
500
500
500
500
500
500
500
500
400
1000
1000
1000
1000
1000
1000
1000
1000
1000
1000
800
(A) (V)
5 20
5 25
5 30
5 38
5 44
5 54
5 65
5 77
5 90
5 110
5 135
10 20
10 25
10 30
10 38
10 44
10 54
10 65
10 77
10 90
10 110
10 135
10/1000µs
(J)
0.9
1.2
1.4
1.7
2.0
2.5
2.9
3.5
4.2
4.8
4.5
1.9
2.3
2.7
3.1
3.8
4.3
5.5
6.3
7.7
8.8
5.6
1KHz
(pF)
9150
7320
6100
3930
3500
2900
2500
2200
1950
1650
1060
36500
18400
15300
11800
10400
8900
7500
4600
4000
3500
2850
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