1N3997RA

Single Zener Diodes Overview

The Microchip Technology 1N3997RA is a silicon unidirectional Zener diode with a nominal regulation voltage of 5.6 V and a tolerance of 5%. It features a maximum power dissipation of 10 W and operates within a temperature range of -65 °C to +175 °C. The device utilizes a DO-4 (DO-203AA) hermetically sealed metal-glass package with one pin, where the case serves as the anode. It complies with MIL-PRF-19500/124 standards.

Single Zener Diodes Feature Summary

• Hermetically sealed welded construction for environmental protection
• Internal solder bond construction for mechanical stability
• Military qualification grades available per MIL-PRF-19500/124

Single Zener Diodes Applications

• High-reliability voltage regulation in military systems
• Power supply protection in aerospace environments
• Overvoltage clamping in ruggedized electronic circuits

Single Zener Diodes Procurement Notes

Verify the specific qualification grade (JAN, JANTX, or JANTXV) required for your application, as availability varies by voltage value. Confirm lead times and ordering requirements directly with the manufacturer or authorized distributors, as these components are often produced under special order conditions. Ensure compliance with relevant export control classifications (EAR99) and material specifications before procurement.

Single Zener Diodes Selection Notes

Select this component when high power handling and extreme temperature operation are critical. The DO-4 package allows for stud mounting, facilitating efficient heat dissipation. Verify that the 5.6 V Zener voltage aligns with circuit requirements and that the hermetic seal meets the environmental durability standards of the target deployment.

Single Zener Diodes Part Context

This part belongs to the 1N3993A through 1N3998A series of 10W Zener diodes manufactured by Microchip Technology. These devices are JEDEC registered and designed for applications requiring robust voltage regulation in harsh conditions. The series offers various voltage values between 3.9 V and 200 V, with multiple military qualification levels available.

Single Zener Diodes Replacement Considerations

Consult the manufacturer for surface mount equivalents if space constraints require alternative packaging. Direct replacements must match the 10 W power rating, 5.6 V Zener voltage, and DO-4 package dimensions to ensure compatibility.