Telephone Signal And Other Communication Lightning Protection Solutions
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Telephone Signal And Other Communication Lightning Protection Solutions

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With the widespread application of communication bus technology, lightning and interference have become common problems encountered by various communication buses in practical projects. Lightning can cause serious damage to systems composed of various communication buses, and electromagnetic interference can also seriously affect the data transmission quality of communication buses. To this end, a communication bus lightning protection circuit capable of preventing induction lightning and anti-interference and realizing a universal solution are proposed. Shanghai Yint has developed the following solutions for telephone line transmission:

 

1、universal telephone line lightning protection circuit (common mode GDT 10KA 4000V level)

 

Suitable for circuits, telecommunications, POS terminal equipment, fax and other related products that use telephone signals, etc.
11

 

 

Products selection
GDT 1~3

3R230L /M

L is plug-in type

M is patch type

layout attached picture 1

Thyristor

INT.P3100SCL OR INT.P2300SCL

IPP is 100A

 

layout attached picture 3

INT PPTC

INT250-120

2500V level

144PCS

layout attached picture 4

 

2、universal telephone line lightning protection circuit (differential mode GDT 5KA 1500V level)

 

Suitable for circuits, telecommunications, POS terminal equipment, fax and other related products that use telephone signals, etc.

21
Products selection

GDT

2R230L-8

L is plug-in type

M is patch type

 

layout attached picture 5

Thyristor

INT.P3100SAL Or INT.P2300SAL

IPP is 50A

 

layout attached picture 3

TVS

P6KE200CA

plug-in type

 

layout attached picture 2

 

SMBJ200CA

   

layout attached picture 3

INT PPTC

INT250-120

2500V level

 

layout attached picture 4

 

 

All the above solutions can pass the "Communications Industry Standard of the People's Republic of China" YD/T993-2006.

 

Figure 1

Size

3R230L-8

T(Max)

15.0

t

10.0+0.3

D

8.0+0.2

d

1.0+0.05

S

4.4+0.2

H(Max)

12.0

3

 

 

figure 2

Size

P6KE30CA

Minimum

Maximum

L

25.4

customizable

T

5.8

7.6

d

2.6

3.6

S

0.71

0.86

4

 

 

 

figure 3

 

 

Type

SMBJ30CA

Do-214AA/SMB

Type

INT.P0300SAL

Do-214AA/SMB

Type

INT.P2300SAL

Do-214AA/SMB

Type

INT.P3100SAL

Do-214AA/SMB

 

51
figure 4

 

PPTC

A

B

C

D

E

Max

Max

Typ

Min

Max

R250-120

6.5

11.0

3.8

--

5.1

7
 
figure 5

Size

2R230L-8

D

8.0+0.3

T

8.0+0.6

L(Max)

30.0

d

0.8+0.1

8

 

 

 

 
 

 

 

 

 

 

 

 

 

 

 

 

 

 

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