G.Fast
CO and DPU Side Protection
*e Bourns® model TISP4G024L1W yristor Surge Protector and model 2026-42-C2LF Gas Discharge Tube and model
SM51430EL in conjunction help to ensure an application’s compliance to ITU-T K.20 and K.45 Enhanced. ese components
can withstand 10/700 μs surges as described in ITU-T K.20 Basic and K.45 Enhanced recommendation.
e schematic above illustrates the application protection and does not constitute the complete circuit design.
Customers should verify actual device performance in their specic applications.
TISP4G024L1W
2026-42-C2LF
SM51430EL
COPYRIGHT© 2018 • BOURNS, INC. • 3/18 • e/K1820 • “PortNote” is a registered service mark of Bourns, Inc.
“Bourns” is a registered trademark of Bourns, Inc. in the U.S. and other countries.
Solution Products
Bourns® PortNote® solutions provide protection
recommendations for typical port threats.
For more information, go to:
www.bourns.com
or email: protection@bourns.com
Compliance*
ITU-T K.20 and K.45 Enhanced
Alternate Recommendations
Various G.Fast protection solutions are available
depending on specic design constraints; contact
your local Bourns technical representative for
more information.
Benet
is solution provides protection on the driver
side without impairing the G.Fast signal.
Objective
G.Fast provides fast data transmission over
a twisted pair of copper wire. is solution
protects CO and DPU side ports against surge
and power contact.
Solution
1 Thyristor Surge Protector (TISP):
TISP4G024L1W
1 Gas Discharge Tube (GDT) Surge Arrestor:
2026-42-C2LF
1 Transformer:
SM51430EL
TISP4G024L1W
SM51430EL
50 Ω
50 Ω
100 nF
+V
–V 27 nF
2026-42-C2LF
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