1N4732A

Overview

The Lumimax Optoelectronic Technology 1N4732A is a silicon unidirectional voltage regulator diode designed for general-purpose applications. It features a nominal Zener voltage of 4.7V with a tolerance of ±5%. The device operates within a power dissipation limit of 1W and maintains a maximum Zener impedance of 8 Ohms. Electrical characteristics include a reverse leakage current of 10µA at 1V and a forward voltage drop of 1.2V at 200mA. It utilizes a JEDEC DO-41 glass molded package with axial leads, supporting junction temperatures up to 200°C.

Feature Summary

• Glass passivated junction construction for enhanced stability
• Low Zener impedance and low regulation factor
• High temperature soldering capability guaranteed

Applications

• Voltage regulation circuits
• Voltage reference applications
• Clipping and clamping circuits

Procurement Notes

Verify the manufacturer designation as Lumimax Optoelectronic Technology against standard industry listings, as this part number is predominantly associated with other semiconductor manufacturers. Confirm that the specific datasheet provided matches the exact component specifications required for your design. Ensure the DO-41 package dimensions and lead solderability meet MIL-STD requirements if specified in your system documentation.

Selection Notes

Select this component when a precise 4.7V reference is needed with tight tolerance requirements. The DO-41 through-hole package facilitates easy integration into standard PCB layouts. Consider the thermal resistance and power dissipation limits when designing heat management strategies for high-density assemblies or elevated ambient temperature environments.

Part Context

This component belongs to the 1N47xxA series of Zener diodes, which covers a wide range of voltage ratings from 3.3V to 75V. The 'A' suffix specifically denotes a tighter manufacturing tolerance compared to standard variants. These diodes are widely used in industrial and commercial electronics where reliable voltage stabilization is critical for circuit performance.

Replacement Considerations

Standard equivalents include the onsemi 1N4732A, Nexperia 1N4732A, and Microchip 1N4732A. Verify pinout compatibility and package dimensions before substitution. Ensure replacement parts meet the same electrical thresholds for impedance and leakage current.