Active production — 3.6 V Zener in a standard SMA outline
The SMAJ4729E3/TR13 is a 3.6 V Zener diode from Microchip Technology, rated for 2 W maximum power dissipation in the DO-214AC (SMA) surface-mount package. The ±10% tolerance on the nominal Zener voltage means the actual breakdown sits between 3.24 V and 3.96 V — wide enough for general-purpose shunt regulation or voltage clamping, but worth checking if the downstream circuit needs a tighter reference. With a maximum Zener impedance of 10 Ohms at the test current, the regulation voltage shifts about 10 mV per mA of load change — acceptable for most bias and protection roles, though a lower-impedance Zener would be preferred for precision references.
Temperature grade and package fit
The DO-214AC (SMA) footprint is a JEDEC standard outline shared across thousands of Schottky and Zener diodes. The Tape & Reel (TR) packaging on a 13-inch reel feeds directly into a pick-and-place line; the reel quantity is confirmed at quote time.
Leakage and forward characteristics
Reverse leakage is specified at 100 µA maximum when 1 V is applied — well below the Zener knee, so the diode draws negligible current in a reverse-biased protection circuit until the transient exceeds 3.6 V. Forward voltage is 1.2 V maximum at 200 mA forward current — the diode conducts like a standard silicon rectifier in the forward quadrant, which matters if the circuit uses it as a bidirectional clamp.