1N4734A G

Overview

The Microsemi Corporation 1N4734A G is a silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 5.6 V with a tolerance of ±5%. The device is rated for a maximum power dissipation of 1 W and operates within a temperature range of -65°C to +175°C. It utilizes a DO-204AL (DO-41) axial through-hole package with a glass body. Key electrical characteristics include a maximum dynamic impedance of 5 ohms and a reverse leakage current of 10 µA at 2 V.

Feature Summary

• Provides stable voltage regulation across a broad operating current and temperature range
• Features hermetically sealed glass encapsulation for high reliability
• Offers higher rated temperature capability compared to plastic-body variants

Applications

• Voltage regulation in electronic circuits
• High-reliability aerospace and defense systems
• Temperature-stable reference applications

Procurement Notes

Verify the specific suffix 'G' indicates the hermetically sealed glass variant, distinct from plastic or surface-mount versions. Confirm RoHS compliance status as standard 'G' suffix parts may not be compliant; look for 'e3' suffix if required. Ensure the manufacturer is identified as Microchip Technology, which acquired Microsemi, to align with current ordering documentation.

Selection Notes

Select this component when high thermal stability and hermetic sealing are required for through-hole designs. The 1W power rating supports moderate current loads. Compare against plastic equivalents like 1N4734AP if lower cost is prioritized over environmental sealing. Verify that the 5.6V output matches the circuit's regulation requirements.

Part Context

This part belongs to the popular 1N4728AG through 1N4764AG series of 1-watt Zener diodes. The series provides voltage selection from 3.3 to 100 volts. The 'G' suffix specifically denotes the glass-body JEDEC package option, offering superior performance in harsh environments compared to the plastic 'P' suffix counterparts.

Replacement Considerations

Direct functional substitutes include other manufacturers' 1N4734A devices in DO-41 packages. For hermetic requirements, verify equivalent military-grade specifications. Surface-mount alternatives exist in the SMAJ series but require different footprint considerations.