1N4757AG

Overview

The Microsemi 1N4757AG is a silicon unidirectional Zener diode with a nominal voltage of 51V and a power dissipation rating of 1W. It features a hermetically sealed glass body in the DO-204AL (DO-41) package. The device provides standard voltage tolerance of ±5% and operates within a junction temperature range up to 175°C.

Feature Summary

• Hermetically sealed glass encapsulation for environmental protection
• High thermal resistance capability suitable for elevated temperatures
• JEDEC registered part number for standardized compatibility

Applications

• Voltage regulation in high reliability circuits
• Clipping and stabilization applications
• Military and aerospace electronic systems

Procurement Notes

Verify the specific suffix 'G' indicates the glass hermetic package variant rather than the plastic equivalent. Confirm RoHS compliance status as the base 'G' designation may imply leaded construction depending on the manufacturing date code. Ensure the supplier source matches Microsemi specifications for military screening levels if required.

Selection Notes

Select this component when hermetic sealing is mandatory for harsh environments. The glass body offers superior thermal performance compared to plastic alternatives. Consider surface mount equivalents like MLL4757A if board space constraints require a different form factor while maintaining electrical equivalence.

Part Context

This part belongs to the JEDEC registered 1N4728A through 1N4764A series of 1-watt Zener diodes. The 'G' suffix specifically denotes the glass body construction, distinguishing it from the plastic 'P' suffix variants. This series provides extensive voltage selection ranging from 3.3V to 100V.

Replacement Considerations

• MLL4757A
• SMAJ4757A