Maida Development Company
GDT SERIES
Gas Discharge Tube
The Gas Discharge Tube, or GDT, Series are designed to withstand the rigors of
overvoltages and transient currents with excellent surge current to size ratio. GDT’s
exhibit very low capacitance values which are beneficial in numerous applications:
including data and communication protection. The GDT Series are also used in AC
power line applications as they exhibit no leakage current and have small to large surge
capabilities. Standard and custom sizes are available with no wire lead, wire leads, and
surface mount options. Standard and custom voltages are also available.
MAIDA DEVELOPMENT COMPANY
Phone: (757) 723-0785, Fax: (757) 722-5471
www.maida.com
, sales@maida.com
INTRODUCTION
The Gas Discharge Tube (GDT) is an over-
voltage protection device typically used
against overvoltages caused by transients
such as lightning. The purpose of a GDT,
similar to a varistor, is to redirect the transient
condition away from the protected circuit. Gas
Discharge Tubes exhibit very low capacitance
values which are beneficial in data and
communication protection. GDT’s are also
used in AC power line applications as they
exhibit no leakage currents.
Maida’s GDT’s are offered in various
configurations with numerous operating
voltages and maximum surge current ratings.
The GDT’s are manufactured in no leads, 2 and
3 leaded configurations as well as surface
mount.
STYLE DESIGNATION
The following is the standard part numbering
system when ordering our Gas Discharge Tube
(GDT) components:
EX: 55A090
1.) Nominal Diameter (mm)
2.) Nominal Height (mm)
3.) Lead Configuration
A – no leads
B – leads
4.) Nominal DC Breakdown Voltage
e.g. 090 is 90V
151 is 150V
3000 is 3000V
STANDARD MARKING
Minimum marking information shall consist of
the style designation, manufacturer’s initials,
and a date code.
56B090
MDC1110
50B075
MDC1110
56B090
MDC1110
50B075
MDC1110
GAS DISCHARGE TUBE (GDT) SERIES