1N4733A

Overview

The Lumimax Optoelectronic Technology 1N4733A is a silicon planar power Zener diode designed for voltage regulation and clipping applications. It features a nominal Zener voltage of 5.1V with a standard tolerance of ±5%. The device operates within the 1N47xxA series, providing a peak pulse power dissipation of 1W (1000mW). It utilizes a JEDEC DO-41 glass package with plated axial leads. Key electrical characteristics include a maximum dynamic impedance of 7 Ohms and a forward voltage of 1.2V at 200mA. The junction temperature rating reaches 200°C, ensuring reliability in high-temperature environments.

Feature Summary

• Glass passivated junction construction for enhanced stability
• Low Zener impedance and low regulation factor for precise voltage control
• High temperature soldering capability guaranteed at 260°C

Applications

• Voltage stabilization circuits
• Signal clipping and limiting applications
• Reference voltage generation in electronic systems

Procurement Notes

Verify that the ordered component matches the specific Lumimax Optoelectronic Technology manufacturer designation. Confirm the package type is DO-41 glass and check for the suffix 'A' to ensure the required ±5% voltage tolerance. Ensure the datasheet specifications align with your circuit's thermal and current requirements before integration.

Selection Notes

Select this component when a stable 5.1V reference is required in a through-hole glass package. Consider the 1W power dissipation limit and the 200°C junction temperature rating for thermal management. The low dynamic impedance makes it suitable for applications demanding tight voltage regulation under varying load conditions.

Part Context

This part belongs to the 1N47xxA series of Zener diodes, which covers a wide range of voltages from 3.3V to 75V. The 'A' suffix specifically denotes the tighter ±5% tolerance band compared to standard variants. The series is characterized by its robust glass passivation and suitability for general-purpose voltage regulation tasks in industrial and commercial electronics.

Replacement Considerations

Compatible substitutes include other manufacturers' 1N4733A parts, such as those from Vishay or Microchip, provided they meet the same 5.1V, 1W, and DO-41 package specifications. Verify that replacement units also feature glass passivation and similar impedance characteristics to maintain circuit performance.