1N4731A G

Overview

The Microsemi Corporation 1N4731A G is a hermetically sealed glass body Zener diode with a nominal voltage of 4.3 V and a tolerance of 5%. It operates in the DO-41 (DO-204AL) axial leaded package, dissipating 1 W of power. The device features a maximum dynamic impedance of 9 Ω and a test current of 58 mA. It supports an operating temperature range from -65 °C to 175 °C.

Feature Summary

• Hermetically sealed glass encapsulation for high reliability
• Axial leaded DO-41 package design
• Wide thermal operating capability up to 175 °C

Applications

• Voltage regulation circuits requiring hermetic sealing
• High-reliability electronic systems
• Temperature-stable reference applications

Procurement Notes

Verify the specific manufacturer designation, as the component is historically associated with Microsemi and subsequently acquired by Microchip Technology. Confirm that the 'G' suffix explicitly denotes the hermetically sealed glass variant rather than standard plastic packaging. Ensure compliance requirements align with the intended application environment before procurement.

Selection Notes

Select this component when hermetic sealing is mandatory for environmental protection or long-term stability. The 4.3 V rating suits low-voltage regulation tasks. Verify that the 1 W power dissipation and 9 Ω impedance meet circuit specifications. Consider surface mount equivalents if board space constraints preclude the use of the DO-41 axial package.

Part Context

This part belongs to the JEDEC registered 1N47xxA series of 1-watt Zener diodes. The 'G' suffix specifically identifies the glass body construction, distinguishing it from plastic-bodied variants like the 1N4731AP. This series provides extensive voltage selection from 3.3 V to 100 V with standard 5% tolerances.

Replacement Considerations

• 1N4731AGTRE3
• MQ1N4731CG