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