1N4740 G

Overview

The Microsemi Corporation 1N4740 G is a silicon unidirectional Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 10 V with a tolerance of 5% and a power dissipation rating of 1 W. The component utilizes a hermetically sealed glass encapsulation in the DO-204AL (DO-41) axial leaded package, providing two terminals. It operates within a temperature range from -65 °C to 175 °C. The device is classified as non-RoHS compliant and contains lead.

Feature Summary

• Hermetically sealed glass body construction
• High rated operating temperature capability
• JEDEC registered part number standard

Applications

• Voltage regulation circuits requiring high reliability
• Harsh environment electronic systems
• Military and aerospace equipment

Procurement Notes

Verify compliance status and manufacturer specifications before procurement. Confirm that the specific suffix indicates the required hermetic sealing and temperature ratings. Ensure the component meets all environmental and electrical requirements for the intended application. Check for availability of equivalent RoHS-compliant variants if necessary.

Selection Notes

Select this component when hermetic sealing and extended temperature operation are critical. The glass package offers superior stability compared to plastic alternatives. Consider the 1 W power rating and 10 V Zener voltage for suitable circuit designs. Verify compatibility with existing board layouts and thermal management strategies.

Part Context

This part belongs to the 1N4728AG through 1N4764AG series of 1.0 watt Zener diodes manufactured by Microsemi. The 'G' suffix denotes the glass encapsulated variant, which provides hermetic-sealed qualities and higher rated temperatures compared to the plastic-body versions. This series covers a voltage selection from 3.3 to 100 volts.

Replacement Considerations

Equivalent parts include other manufacturers' 1N4740A variants. For hermetic requirements, verify military-grade equivalents. Plastic body replacements lack hermetic sealing. Surface mount equivalents like SMAJ4740A require layout changes.