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ManUtd 21st June 2018 08:30 PM

Unknown Diode
4 Attachment(s)
Hope this forum can help me find out of this Diode.
On PCB it says D18 and with ordinary diode label on PCB with anode/kathode.
When i measure it with a multimeter it says Open both ways.

If anyone can recognise it i would be vary glad for any help.
Diode is suited in an sub amplifier(Class D) near a 2SK2698 Mosfet.

Elvee 22nd June 2018 07:52 AM

My first guess would be a diac, but there are other possibilities: for example, I have seen thermistors and surge arrestors under the same guise.

If you draw the circuitry around, the function will probably become obvious.

JonSnell Electronic 22nd June 2018 08:35 AM

I would say a Diac.
BR100 or BR101

davidsrsb 22nd June 2018 11:55 AM

Possible, a DIAC would not conduct either way on a test meter.
What about the DB6, which would explain the blue stripe?

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