1N4740A G

Overview

The Microsemi Corporation 1N4740A G is a silicon unidirectional Zener diode housed in a hermetically sealed glass DO-41 (DO-204AL) axial leaded package. It provides a nominal Zener voltage of 10V with a tolerance of 5% and a maximum power dissipation of 1W. The device operates within a temperature range of -65°C to +175°C. Key electrical parameters include a maximum reverse leakage current of 10µA, a Zener impedance of 7 Ohms, and a test current of 25mA.

Feature Summary

• Hermetically sealed glass encapsulation for environmental protection
• High thermal stability suitable for extreme operating temperatures
• JEDEC registered standard voltage regulation

Applications

• Voltage regulation in harsh environments
• Reference voltage sources
• Overvoltage protection circuits

Procurement Notes

Verify the specific suffix 'G' indicates hermetic sealing as per Microsemi documentation. Confirm RoHS compliance status, as non-compliant variants exist within this series. Ensure the supplier provides original manufacturer data sheets to validate the hermetic seal integrity and exact electrical tolerances before procurement.

Selection Notes

Select this component when high reliability and hermetic sealing are required for 10V regulation. Compare against plastic DO-41 variants if hermeticity is not critical. Verify that the 1W power rating and 175°C junction temperature limit align with the system's thermal design requirements.

Part Context

This part belongs to the 1N47xx series of 1-watt Zener diodes manufactured by Microsemi. The 'G' suffix specifically denotes a glass body construction with hermetic sealing capabilities, distinguishing it from plastic-bodied counterparts like the 1N4740AP. This series covers a wide voltage range from 3.3V to 100V.

Replacement Considerations

Equivalent parts include Vishay 1N4740AG and onsemi 1N4740A. Verify package compatibility and ensure replacement devices meet the same hermetic sealing and temperature specifications.