Active production — 5.1 V Zener for through-hole designs
The Microchip Technology 1N4733CP/TR8 is an active-production Zener diode with a nominal voltage of 5.1 V and a power dissipation rating of 1 W. The ±2% tolerance on Vz means the actual Zener voltage at the test current will fall between 4.998 V and 5.202 V — tight enough for a 5 V rail clamp or reference in a low-power bias supply.
Thermal and leakage profile
Rated for continuous operation from -65 °C to +150 °C, this diode suits environments from cold-start outdoor gear to hot-side industrial enclosures. Reverse leakage is specified at 10 µA maximum when 1 V is applied across the junction — a low enough draw to avoid loading a high-impedance bias node in standby circuits. Maximum Zener impedance (Zzt) is 7 Ohms, which governs the voltage regulation under varying current; a stiffer supply demands a lower-impedance Zener, but 7 Ohms is typical for a 5.1 V, 1 W part.
DO-41 axial package for through-hole assembly
Housed in a DO-204AL (DO-41) axial-lead package, the 1N4733CP/TR8 is supplied on Tape & Reel for automated insertion into through-hole boards. The axial body and 0.025-inch diameter leads are compatible with standard 0.100-inch pitch PCB layouts and wave-solder profiles.