1N2842A

Overview

The Microchip Technology 1N2842A is a silicon unidirectional Zener diode designed for voltage regulation applications. It features a nominal Zener voltage of 130V with a tolerance of ±10%. The device is rated for a maximum power dissipation of 50W and operates within a specified current range, including a test current of 95mA. It utilizes a TO-204AD (TO-3) metal flange mount package with two pins. The anode is connected to the case, and the component is hermetically sealed. It is classified as a single-element diode suitable for through-hole mounting in industrial and military-grade environments.

Feature Summary

• Hermetically sealed construction for environmental protection
• High power handling capability of 50 watts
• Metal flange mount package with case-connected anode

Applications

• Voltage regulation circuits
• Overvoltage protection systems
• Military and aerospace electronic equipment

Procurement Notes

Verify the specific suffix code on the datasheet to confirm exact electrical tolerances and temperature ratings, as variations exist within the 1N2842 family. Ensure the procurement specification matches the required hermetic sealing level and lead finish. Confirm that the TO-3 package dimensions align with the target PCB or chassis mounting constraints. Request official certification documents if the application requires traceability for regulated industries.

Selection Notes

Select this component when a high-power, hermetically sealed Zener diode is required for critical voltage reference applications. The TO-3 package provides superior thermal dissipation compared to smaller plastic packages. Consider the ±10% voltage tolerance during circuit design to ensure the regulated output remains within acceptable limits under varying load conditions. Verify compatibility with existing heat sinking infrastructure due to the metal case design.

Part Context

The 1N2842A belongs to the standard 1N28xx series of high-power Zener diodes originally developed for ruggedized electronics. This series is widely recognized in defense and space sectors for its reliability. Microchip Technology continues production of these legacy parts to support long-term maintenance of established military and industrial systems where component obsolescence must be avoided.

Replacement Considerations

Cross-reference with JANTXV1N2842D for equivalent military-grade specifications. Verify pinout compatibility and thermal resistance values before substituting.