Electronics > Beginners

Is this a signal diode or a zener?

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NivagSwerdna:
Could this be a signal diode?

Thanks[attachimg=1]

Manul:
It is likely 1N4148, is there also "41" written on the other side?

NivagSwerdna:
Stupidly I put it back before taking photos of the other side... but at an oblique angle...

[attachimg=1]

Looks like what I thought were just lines could be a 41!

NivagSwerdna:
What about this one...

Looks like 3V9... so that would be a zener even though it looks similar?  The board marking is a bit ambiguous due to the coincidence with the square?
[attachimg=1]

Gyro:
Yes, a 1N4148 and a 3V9 400mW zener.

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