Nominal zener voltage is measured with the device junction in the thermal equilibrium at the lead temperature (T
L
) at 30°C ± 1°C and 3/8” lead length.
2. Zener Impedance (Z
Z
) Derivation
Z
ZT
and Z
ZK
are measured by dividing the ac voltage drop across the device by the ac current applied. The specified limits are for I
Z(ac)
= 0.1 I
Z(dc)
with the ac
frequency = 60Hz.
3. Maximum Zener Current Ratings (I
ZM
)
The maximum current handling capability on a worst case basis is limited by the actual zener voltage at the operation point and the power derating curve.
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