Key parametric tolerances and limits
The SMAJ5921BE3/TR13: The nominal Zener voltage is 6.8 V with a ±5% tolerance, so the regulation window spans roughly 6.46 V to 7.14 V. Maximum impedance (Zzt) is 2.5 Ohms, which governs the voltage shift under load current. Reverse leakage is specified at 5 µA maximum when the applied voltage is 5.2 V — well below the Zener knee, so the diode draws negligible current in the off state until it reaches breakdown. Forward voltage drop is 1.2 V max at 200 mA forward current.
Package, mounting, and compliance
The supplier device package is designated DO-214AC (SMAJ).
