1N4729 G

Overview

The Microsemi Corporation 1N4729 G is a hermetically sealed glass silicon Zener diode designed for voltage regulation applications. It operates within the 1N4728A series, providing a nominal Zener voltage of 3.6 V with a power dissipation rating of 1 W. The component utilizes double slug type construction and features an oxide-passivated die housed in a DO-41 package. It supports a wide operating temperature range from -65°C to +200°C and offers a complete voltage selection from 3.3 to 100 volts.

Feature Summary

• Hermetically sealed glass construction ensures corrosion resistance and reliability
• Double slug type design provides high peak reverse power dissipation capabilities
• Oxide passivated die protects against environmental degradation

Applications

• Voltage regulation circuits requiring stable reference levels
• Protection against overvoltage conditions in sensitive electronics
• Clamping applications in signal processing systems

Procurement Notes

Verify current availability status as this component may be subject to discontinuation or limited production runs. Confirm specific manufacturing lot details and RoHS compliance requirements prior to ordering. Ensure compatibility with existing thermal management designs given the 1 W power dissipation rating. Consult official Microsemi documentation for precise handling and storage guidelines related to hermetically sealed packages.

Selection Notes

Select this component when hermetic sealing is required for harsh environments or long-term reliability. The DO-41 glass package offers superior thermal performance compared to plastic alternatives. Consider the 3.6 V Zener voltage and 1 W power rating to ensure adequate margin for the intended load conditions. Verify that the operating temperature range meets the specific application demands.

Part Context

This device belongs to the JEDEC registered 1N4728A to 1N4764A series of 1-watt Zener diodes. The 'G' suffix typically denotes the glass encapsulation variant, distinguishing it from plastic versions like the 1N4729A. These components are widely used in industrial and military-grade equipment where robust voltage regulation is critical.

Replacement Considerations

Equivalent parts include the 1N4729A (plastic version) and other manufacturers' 1N4729 variants such as those from Motorola/NXP or Taiwan Semiconductor. Ensure package compatibility and verify electrical parameter tolerances match the original design specifications.