1N4732A

Overview

The SMC Diode Solutions 1N4732A is a silicon planar Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 4.7V with a tolerance of ±5%. The device is housed in the DO-41 axial leaded package, supporting a maximum power dissipation of 1W at 25°C ambient temperature. Key electrical characteristics include a maximum reverse leakage current of 10µA and a Zener impedance of 8Ω. The component operates within a junction temperature range of -65°C to +150°C and complies with RoHS standards.

Feature Summary

• Provides stable voltage regulation using silicon planar technology
• Features built-in strain relief for mechanical durability
• Offers high stability across the operating temperature range

Applications

• General purpose voltage regulation circuits
• Reference voltage sources in electronic systems
• Overvoltage protection stages

Procurement Notes

Verify the manufacturer designation on the component marking or datasheet, as the 1N4732A specification is widely produced by multiple semiconductor vendors including Nexperia, onsemi, and Microchip. Confirm that the specific batch matches the required package type and compliance standards before integration into production designs.

Selection Notes

Select this component when a standard 4.7V reference is required in a through-hole axial package. Ensure the circuit design accounts for the 1W power rating and thermal derating requirements. Verify that the ±5% voltage tolerance meets the precision needs of the application compared to tighter tolerance alternatives.

Part Context

This part belongs to the 1N47xx series of 1W Zener diodes, a legacy JEDEC-standardized family widely used in industrial and consumer electronics. The series covers a broad range of voltage values from 3.3V to 100V, providing a standardized solution for basic voltage clamping and regulation tasks across various industries.

Replacement Considerations

Direct functional equivalents include the Nexperia 1N4732A,133 and the onsemi 1N4732A. These parts share identical electrical specifications and the DO-41 package, allowing for pin-compatible substitution in existing designs without circuit modification.