1N4454

Overview

The Microchip Technology 1N4454 is a hermetically sealed, metallurgically bonded switching diode designed for high-reliability applications. It features double plug construction and operates within a junction temperature range of -55°C to +175°C. The device supports an operating current of 200 mA at +25°C ambient temperature. Key electrical parameters include a maximum DC reverse voltage (Vr) of 75 V, a forward voltage (Vf) of 1 V at 10 mA, and a reverse leakage current of 100 nA at 50 V. The component exhibits a reverse recovery time (trr) of 4 ns.

Feature Summary

• Hermetically sealed construction with metallurgical bonding for environmental stability
• Double plug construction ensuring robust mechanical integrity
• Wide operating temperature range suitable for extreme conditions

Applications

• Military aerospace systems requiring MIL-PRF-19500/144 compliance
• High-reliability computer diode circuits
• Signal switching applications in harsh environments

Procurement Notes

Verify the specific suffix (e.g., JAN, JANTX, JANTXV) against the required military screening level per MIL-PRF-19500/144. Confirm package type availability as standard commercial variants may differ from hermetic versions. Check RoHS status as military qualified parts often fall outside standard compliance directives. Validate lead times due to potential long production cycles associated with specialized hermetic packaging.

Selection Notes

Select based on required reverse voltage tolerance and switching speed. Ensure the chosen variant meets the specific thermal management needs given the wide operating range. Verify that the through-hole DO-35 or DO-204AH package fits the mechanical constraints. Consider the higher cost of hermetically sealed units compared to standard plastic encapsulated alternatives when budget permits.

Part Context

The 1N4454 belongs to the MIL-PRF-19500/144 series, distinguishing it from general-purpose signal diodes by its rigorous qualification standards. It serves as a replacement for older military-grade components requiring guaranteed hermeticity. The part is manufactured by Microchip Technology, continuing the lineage of established semiconductor reliability standards.

Replacement Considerations

Direct replacements include JAN1N4454, JANTX1N4454, and JANTXV1N4454 depending on the necessary screening grade. Ensure substitute parts maintain the same hermetic sealing and double plug construction requirements.