1N4733A

Overview

The onsemi 1N4733A is a single silicon planar Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 5.1 V with a tolerance of ±5%. The device is rated for a power dissipation of 1 W and operates within a temperature range of -65 °C to +200 °C. Key electrical parameters include a maximum reverse leakage current of 10 µA, a Zener impedance of 7 Ω at the test current of 49 mA, and a forward voltage of 1.2 V. It utilizes a DO-41-2 through-hole package.

Feature Summary

• Provides stable voltage regulation using silicon planar technology
• Features a hermetically sealed glass body construction for durability
• Offers flexible axial-lead mounting terminals for easy integration

Applications

• Voltage regulation in power supply circuits
• Reference voltage generation in electronic systems
• Overvoltage protection for sensitive components

Procurement Notes

Verify the specific manufacturer lot and RoHS compliance status directly with the supplier or official datasheet before procurement. Confirm that the DO-41 package dimensions match your PCB footprint requirements. Ensure the operating temperature range meets your application's environmental conditions. Check for any specific military screening prefixes if required for reliability standards.

Selection Notes

Select this component when a standard 5.1 V reference is needed in a through-hole configuration. Consider the 1 W power rating for thermal management in your design. Compare the 7 Ω impedance against circuit sensitivity requirements. Evaluate the ±5% tolerance against the precision needs of the voltage regulation task.

Part Context

This part belongs to the widely used 1N47xx series of 1-watt Zener diodes. The 'A' suffix typically denotes a tighter ±5% voltage tolerance compared to the standard ±10% version. It serves as a fundamental discrete semiconductor component for basic analog and digital circuit protection and regulation tasks across various industries.

Replacement Considerations

Equivalent parts from other manufacturers include Vishay 1N4733A-TAP and Microchip 1N4733AURe3. Verify pinout compatibility and package type (DO-41 vs SMD) before substitution. Ensure replacement devices meet the same 1 W power dissipation and 5.1 V nominal voltage specifications.