1N4987

Single Zener Diodes Overview

The Microchip Technology 1N4987 is a military-qualified, voidless hermetically sealed 5-watt glass Zener diode. It provides a nominal Zener voltage of 160 V at a test current of 8 mA. The device features a maximum reverse leakage current of 2 µA at 165 V and a maximum Zener impedance of 350 Ω at the test current. It operates within a temperature range of -65°C to +175°C with a thermal resistance of 22°C/W. The component utilizes an E-package with axial leads and offers a standard 5% voltage tolerance.

Single Zener Diodes Feature Summary

• Military qualified to MIL-PRF-19500/356 for high-reliability applications
• Voidless hermetically sealed glass construction with internal metallurgical bonds
• Inherently radiation hard and non-sensitive to electrostatic discharge

Single Zener Diodes Applications

• High-reliability aerospace systems
• Military electronic circuits
• Critical voltage regulation where failure cannot be tolerated

Single Zener Diodes Procurement Notes

Verify that the specific order includes the correct suffix if tighter tolerances are required, as the base part number denotes standard 5% tolerance. Confirm compliance with MIL-PRF-19500/356 requirements. Ensure the procurement documentation specifies the appropriate packaging option, such as tape and reel per EIA-296, if applicable to the assembly process.

Single Zener Diodes Selection Notes

Select this component when a robust, high-power Zener regulator is needed for extreme environments. The 5-watt rating allows for significant power dissipation compared to smaller packages. Verify that the 160 V breakdown voltage aligns with the circuit design requirements and that the package dimensions fit the available board space.

Single Zener Diodes Part Context

This component belongs to the 1N4954 through 1N4996 series of industry-recognized 5-watt Zener regulators. These devices share common mechanical and electrical characteristics, including the voidless-glass construction and triple-layer passivation. The series covers a wide voltage range from 3.3 to 390 volts, providing flexibility for various high-voltage regulation needs.

Single Zener Diodes Replacement Considerations

Equivalent parts include JANTX1N4987C and other variants within the 1N4954-1N4996 family that meet MIL-PRF-19500/356 specifications.