1N4742A 参数 Datasheet PDF下载

®

TAK CHEONG

Licensed by

ON Semiconductor

,

A trademark of

semiconductor

Components

Industries,

LLC

for

Zener Technology

and

Products

.

3. ZENER VOLTAGE (V

Z

) MEASUREMENT

The zener voltage (V

Z

) is tested under pulse condition. The measured

V

Z

is guaranteed to be within specification with device junction in

thermal equilibrium.

4. ZENER IMPEDANCE (Z

Z

) DERIVATION

The zener impedance is derived from the 60 cycle AC voltage, which results when an AC current having an RMS value equal to 10% of the

DC zener current (I

ZT

or I

ZK

) is superimposed on I

ZT

or I

ZK.

November, 2006 / C

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