Telephone Signal And Other Communication Lightning Protection Solutions

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:

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

 

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

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

 

 

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

 

 

 

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

 

figure 4

 

PPTC	A	B	C	D	E
	Max	Max	Typ	Min	Max
R250-120	6.5	11.0	3.8	--	5.1

 

figure 5

Size	2R230L－8
D	8.0+0.3
T	8.0+0.6
L(Max)	30.0
d	0.8+0.1