Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Testing a GDT with the glow voltage

Status
Not open for further replies.
T

treez

Guest
To test this GDT (2051-47-SM-RPLF) is OK, can we simply place it in series with 3k and put this across 100V?.......Assumedly, from the datasheet, this makes it glow, as the datasheet says glow current is 10mA at 70V?

If it glows then its OK, we are thinking.

Otherwise we will have to put 470V across it in series with a resistor

2051-47-SM-RPLF datasheet
https://www.bourns.com/docs/Product-Datasheets/2051.pdf
 

Breakover voltage ought to be proportional to gas pressure
(at least, until you get close to vacuum) so a fixed current
or high voltage through high value resistor, seems to me a
good check. Provided you have some set of "golden units"
to judge against, or a mfr's test method with limits and
conditions.
 
  • Like
Reactions: treez

    T

    Points: 2
    Helpful Answer Positive Rating
You misunderstand a basic point of GDT operation. There's no current flow before the DC breakover voltage is hit. Glow voltage is observed after ignition with falling current.
 
  • Like
Reactions: treez

    T

    Points: 2
    Helpful Answer Positive Rating
The ON resistance is a fair bit lower than the OFF resistance so for 100V drive on a 70V device the volts will fall below 70 to a value where current is just flowing ....
 
  • Like
Reactions: treez

    T

    Points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top