Discussion
Which of the following is not a rating of a rectifier diode?
Dynamic resistance in breakdown
Peak inverse voltage
Forward surge current
Maximum junction temperature
Answer: D
Dynamic resistance in breakdown is a Zener specification, since an ordinary rectifier is never operated there and would be destroyed if it were. The other three are standard rectifier ratings covering reverse blocking, brief forward overload and thermal limits. A parameter that only makes sense in a region the device is not designed for is a reliable sign that it belongs to a different device.
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