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Help Find Unknown Bad Zener: Digital Volt Amp Meter

Working voltage was max 30v and I burned the transistor BL P11 NPN (1A) with more input. BL P11 is the marking of BCX56 which is a 80V/1A NPN transistor. The 10k (if I read it correctly) resistor, ...
Rohat Kılıç's user avatar
6 votes

BJT B-E Zenering: whither the collector?

This is how I simulate reverse breakdown of base-emitter junctions: simulate this circuit – Schematic created using CircuitLab Diodes D2 and D4 block current when the B-E junction is forward ...
Simon Fitch's user avatar
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7 votes

BJT B-E Zenering: whither the collector?

There's an old riddle I think posed by Bob Pease on his magazine column, back in the day: how to obtain negative voltage from few ordinary components (BJT included) without oscillation? The quirk is, ...
Tim Williams's user avatar
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1 vote
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Zener Diode Current Explanation

When in doubt, always refer to the data sheet numbers: - As you can see, the test current that establishes the Zener voltage (typically 8.2 volts) is 5 mA and, the 700 nA figure refers to the leakage ...
Andy aka's user avatar
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0 votes

Zener Diode Current Explanation

Supplier catalogs are collected data, not primary sources. The datasheet is a primary source, and should be relied upon as such, unless heard otherwise from the manufacturer. (It is prudent to check ...
Tim Williams's user avatar
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1 vote

Zener Diode Current Explanation

The difference is only in how the term is used in each list, they refer to different things. 5 mA was the test current, meaning what current was used while measuring other paramaters, while 700 nA was ...
Ralph's user avatar
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0 votes

Can you identify this Zener diode?

The SMAJ5.0CA-TR is a TVS diode made by STMicroelectronics, and is marked "AA", see table 6 on page 10 of the datasheet.
ocrdu's user avatar
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2 votes
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Can you identify this Zener diode?

Image below from here: - It's the bidirectional version that you have. I think you may not have been looking in the correct column.
Andy aka's user avatar
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