7.5 V Zener in a 1 W axial package
The 1N4737P/TR8 is a 7.5 V Zener diode rated for 1 W continuous power dissipation in the through-hole DO-204AL (DO-41) package.
Parametric fit for a voltage reference or clamp
Maximum impedance (Zzt) is 4 Ohms at the test current — a low dynamic resistance that keeps the voltage stable across the operating current range. Reverse leakage is 10 µA maximum at 5 V reverse bias, so in a high-impedance divider the leakage current does not shift the bias point significantly.
Microchip Technology lists this part as Active, meaning the die and assembly lines are still running. The Tape & Reel packaging (TR suffix) is the standard reel option for automated insertion — the same die is also available in bulk or ammo-pack variants under the base number 1N4737.