RD33E diodes equivalent, 500mw planar type silicon zener diodes.
* The zener voltage series has a wide voltage range of 2 to 120 V and is ideal for standardization.
* The E24 series is employed for the zener voltage nominal val.
* Zener voltage and constant-current circuit
* Waveform clipper circuit and limiter circuit
* Surge absorpti.
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