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KrisBlueNZ
Sadly passed away in 2015
Glass diodes do not usually have any identifying stripes apart from a single stripe that indicates the cathode.
The diode in your third picture has a black stripe at one end; this indicates the cathode. This is the usual marking for diodes.
I have seen diodes marked yellow-brown-yellow-grey, which (using the resistor colour code) reads "4148", meaning 1N4148, which is a common signal diode. But it is not usual to mark the diode's part number using coloured stripes.
The diode in your first picture seem to have stripes coloured blue, grey and red, which is either 682 or 286 depending on which way round you read them. I'm not aware of any diodes with those numbers in their part number though.
Some diodes have their part number printed in digits. Zener diodes often have their voltage marked using digits. Otherwise, generally there is no way to identify a small-signal glass diode from its package; there is usually just one stripe, which indicates the cathode.
If you have any specific questions please ask.
The diode in your third picture has a black stripe at one end; this indicates the cathode. This is the usual marking for diodes.
I have seen diodes marked yellow-brown-yellow-grey, which (using the resistor colour code) reads "4148", meaning 1N4148, which is a common signal diode. But it is not usual to mark the diode's part number using coloured stripes.
The diode in your first picture seem to have stripes coloured blue, grey and red, which is either 682 or 286 depending on which way round you read them. I'm not aware of any diodes with those numbers in their part number though.
Some diodes have their part number printed in digits. Zener diodes often have their voltage marked using digits. Otherwise, generally there is no way to identify a small-signal glass diode from its package; there is usually just one stripe, which indicates the cathode.
If you have any specific questions please ask.
Thank u
