An electrical device such as this requires reverse leakage current of 10μA @ 7.6V.During operation, the maximum voltage - Zener (Nom) is reduced to 10V volts.
1N4740A_T50R Features
reverse leakage current of 10μA @ 7.6V 10μA @ 7.6V is the maximum voltage (Tol)
1N4740A_T50R Applications
There are a lot of ON Semiconductor 1N4740A_T50R applications of zener single diodes.