1N4737 G

Overview

The Microsemi Corporation 1N4737 G is a silicon Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 7.5V with a tolerance of 2%. The device is rated for a power dissipation of 1W and utilizes a glass-encapsulated DO-204AL (DO-41) axial leaded package. This component is hermetically sealed, ensuring reliability in demanding environments. It operates within a temperature range extending up to 175°C, making it suitable for high-temperature industrial uses.

Feature Summary

• Hermetically sealed glass encapsulation for environmental protection
• High thermal stability supporting elevated operating temperatures
• Standardized JEDEC DO-204AL axial leaded form factor

Applications

• Voltage reference circuits requiring stable DC levels
• Overvoltage protection in power supply inputs
• Clamping applications in signal conditioning paths

Procurement Notes

Verify the specific suffix 'G' confirms hermetic sealing and glass construction distinct from plastic variants. Confirm RoHS compliance status as historical Microsemi data indicates mixed availability for this series. Validate manufacturer lineage due to corporate acquisitions affecting part numbering and documentation sources.

Selection Notes

Select this component when hermetic sealing is mandatory for radiation or harsh environment resistance. Compare against plastic equivalents if thermal resistance requirements are less stringent. Ensure the 7.5V rating aligns with circuit breakdown thresholds without exceeding maximum power dissipation limits under worst-case load conditions.

Part Context

This part belongs to the 1N4728A through 1N4764A series of 1-watt Zener diodes manufactured by Microsemi. The 'G' suffix specifically denotes the glass body option, which provides superior hermeticity compared to the plastic 'P' suffix counterparts. These devices are widely used in military and aerospace electronics where long-term stability and leak-tight packaging are critical specifications.

Replacement Considerations

Direct substitutes include other manufacturers' 1N4737A parts meeting identical electrical and mechanical specifications. Verify pinout compatibility and package dimensions before integration.