An electrical device like this requires a reverse leakage current of 500nA @ 32V.While the device is operating, the maximum voltage - Zener (Nom) is reduced to 43V.Design flexibility is enhanced by its zener current of 24mA.
ZPY43-TR Features
reverse leakage current of 500nA @ 32V 500nA @ 32V is the maximum voltage (Tol) the zener current of 24mA
ZPY43-TR Applications
There are a lot of Vishay Semiconductor Diodes Division ZPY43-TR applications of zener single diodes.