1N4729A

Overview

The Fairchild Semiconductor 1N4729A is a single silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 3.6 V with a tolerance of ±5%. The device supports a maximum power dissipation of 1 W at an ambient temperature of 25°C, derating linearly above 50°C. It operates within a junction temperature range of -65°C to +200°C and utilizes the DO-41 axial through-hole package.

Feature Summary

• Hermetically sealed glass construction for environmental stability
• High power rating suitable for stabilizing and clipping circuits
• Unidirectional voltage regulation capability

Applications

• Voltage stabilization in electronic circuits
• Waveform clipping applications
• Reference voltage generation

Procurement Notes

Verify the specific manufacturer source, as the 1N4729A designation is utilized by multiple vendors including Vishay and MCC. Confirm that the procurement matches the Fairchild Semiconductor specification sheet regarding the 1W power rating and DO-41 package dimensions. Ensure compliance with RoHS requirements if applicable to the specific production batch.

Selection Notes

Select this component when a precise 3.6 V reference is required in high-power environments. The DO-41 package allows for standard through-hole mounting. Consider the thermal derating characteristics for operation above 50°C. Verify impedance specifications against circuit sensitivity requirements.

Part Context

This part belongs to the 1N4728A series of one-watt hermetically sealed glass silicon Zener diodes. The series covers a wide voltage range from 3.3 V to 100 V. The 1N4729A specifically addresses the lower end of this spectrum, providing stable regulation for low-voltage DC supply lines.

Replacement Considerations

Equivalent parts include the Vishay 1N4729A-TR and Micro Commercial Components 1N4729A-TP. These alternatives share identical electrical ratings and the DO-41 package form factor.