Silicon Planar Zener Diodes The Zener voltages are graded according to the international E 24 standard. Smaller voltage tolerances and higher Zener voltages on request. DIM ENSIONS DIM A B C D inches Min. 1.083 Max. 0.154 0.075 0.020 Min. 27.50 mm Max. 3.9 1.9 0.52 Note Absolute Maximum Ratings (.