1N4732AP/TR8

Overview

The Microsemi Corporation 1N4732AP/TR8 is a single silicon Zener diode housed in the DO-204AL (DO-41) axial through-hole package. It provides a nominal Zener voltage of 4.7 V with a tolerance of ±10% and a maximum power dissipation of 1 W. The device exhibits a maximum Zener impedance of 8 Ohms and operates within a temperature range of -65°C to 150°C. Electrical characteristics include a reverse leakage current of 10 µA at 1 V and a forward voltage of 1.2 V at 200 mA.

Feature Summary

• Provides stable voltage regulation using a single silicon junction structure
• Features plastic encapsulation with built-in strain relief for mechanical durability
• Offers hermetic sealing options in related series variants for high-reliability environments

Applications

• Voltage regulation circuits
• Overvoltage protection systems
• Reference voltage generation

Procurement Notes

Verify component authenticity as this part number is listed as obsolete by the manufacturer. Confirm specific lot codes and manufacturing dates due to potential end-of-life status. Ensure compatibility with existing assembly processes given the axial lead configuration. Check for updated replacement recommendations from Microsemi or authorized distributors before finalizing procurement plans.

Selection Notes

Select this component when a standard 4.7 V regulation point is required in a through-hole design. The DO-41 package suits applications needing robust mechanical mounting. Consider the ±10% tolerance for general-purpose uses rather than precision instrumentation. Evaluate thermal management requirements based on the 1 W power rating and ambient operating conditions.

Part Context

This device belongs to the widely recognized 1N47xx series of 1-watt Zener diodes manufactured by Microsemi. The 'P' suffix indicates a plastic molded case, distinguishing it from glass-body variants. The TR8 designation specifies the tape-and-reel packaging format used for automated surface-mount or through-hole insertion equipment.

Replacement Considerations

Equivalent parts include the 1N4732A and 1N4732AT3G. Verify pinout compatibility and ensure the substitute meets the same 1 W power and 4.7 V voltage specifications.