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Figure 1-26.Semiconductor diode markings
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Antique Radio Forums • View topic - identify glass diodes?
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Diode Color ID Band Table
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Glass zener diode identification - Discrete Semiconductor Products - Electronic Component and Engineering Solution Forum - TechForum │ Digi-Key
Source DL4728A thru DL4761A MELF 1W Glass Case SMD Zener Diode Marking on m.alibaba.com