7.5 V shunt regulator with ±2% tolerance
The 1N4737CP/TR8 is a 7.5 V Zener diode from Microchip Technology, rated for 1 W continuous power dissipation in the standard DO-204AL (DO-41) axial-lead package. The ±2% tolerance on the nominal Zener voltage is tighter than the common 5% or 10% grades, which matters when the shunt reference sets a supply rail or ADC bias voltage that cannot drift more than 150 mV over temperature and load. Maximum Zener impedance (Zzt) is 4 Ohms at the test current — a low dynamic resistance that keeps the output voltage stable as the load current varies within the 1 W dissipation budget.
Wide temperature range and reverse leakage
Reverse leakage current is specified at 10 µA maximum at 5 V reverse voltage — a guard-band figure that confirms the diode blocks cleanly below the Zener knee. Maximum forward voltage is 1.2 V at 200 mA forward current, typical for a silicon Zener in this power class.
The Tape & Reel suffix (/TR8) signals reel quantity packaging for automated pick-and-place assembly; the same die is also available in bulk or ammo-pack variants under the base number 1N4737.