1N4732A

Overview

The Microchip Technology 1N4732A is a single silicon unidirectional voltage regulator diode designed for through-hole mounting in the DO-41 package. It provides a nominal Zener voltage of 4.7 V with a standard tolerance of 5%. The device supports a maximum power dissipation of 1 W and operates within a temperature range of -65°C to +175°C. Key electrical characteristics include a maximum reverse leakage current of 10 µA, a Zener impedance of 8 Ohms, and a test current of 53 mA.

Feature Summary

• Provides stable voltage regulation at a nominal 4.7 V reference level
• Features hermetic glass construction suitable for high reliability applications
• Designed for surface mount or equivalent axial lead configurations

Applications

• Voltage regulation circuits
• High density electronic assemblies requiring low parasitic effects
• Applications governed by source control drawings

Procurement Notes

Verify the specific suffix (e.g., UR) against the required JEDEC outline, as Microchip offers both through-hole and surface-mount variants under this base number. Confirm RoHS compliance status, as non-e3 suffixes may not meet current environmental standards. Ensure the selected package matches the PCB footprint requirements before ordering.

Selection Notes

Select the 1N4732A when a precise 4.7 V reference is needed with 5% tolerance. Choose the UR variant for surface mount assembly needs, while standard versions suit through-hole designs. Verify that the 1 W power rating accommodates the expected thermal load and that the operating temperature range aligns with the system environment.

Part Context

This component belongs to the 1N47 series of 1-watt Zener diodes manufactured by Microchip Technology. The series covers a wide voltage range from 3.3V to 100V. The 1N4732A specifically targets applications requiring reliable voltage clamping or regulation in compact form factors, leveraging the robustness of silicon planar technology.

Replacement Considerations

The MQ1N4732UR from Microsemi is an electrically equivalent alternative in the DO-213AB package. Other manufacturers offer the 1N4732A in DO-41 packages, but verify pinout compatibility and exact Zener impedance specifications before substitution.