1N6640

Overview

The Microchip Technology 1N6640 is a single-element silicon switching diode designed for high-speed signal and computer applications. It features a maximum average forward current of 300 mA and a peak repetitive reverse voltage of 75 V, with a surge current rating of 2.5 A. The device exhibits a fast recovery time of 4 ns and a low forward voltage drop of 1 V at rated current. Reverse leakage current is limited to 100 nA. It operates reliably within an extended temperature range from -65°C to +175°C.

Feature Summary

• High-speed switching capability with a 4 ns recovery time suitable for digital logic circuits.
• Extended thermal stability allowing operation in extreme environments up to +175°C.
• Robust surge handling with a 2.5 A non-repetitive peak forward current rating.

Applications

• Digital logic interface protection
• Computer circuit signal rectification
• High-speed switching applications

Procurement Notes

Verify the specific suffix (e.g., US, JANTX) to confirm package type and qualification level. Standard commercial versions differ from military-grade variants in testing requirements. Confirm RoHS compliance status as it varies by manufacturer batch and specific ordering code. Ensure the selected variant matches the required mounting style for your PCB design.

Selection Notes

Select this component when a small-signal diode requires fast recovery characteristics combined with wide temperature tolerance. Compare the 75 V reverse voltage limit against circuit peaks to ensure adequate margin. Consider the 300 mA continuous current limit for power dissipation calculations. Evaluate package options based on available board space and thermal management needs.

Part Context

This part belongs to the 1N6638 series of switching diodes manufactured by Microchip Technology. The series includes various configurations such as 1N6638 through 1N6643, offering different voltage and current ratings. These components are widely used in general-purpose and specialized switching roles across industrial and consumer electronics sectors.

Replacement Considerations

Direct substitutes include other 1N6640 variants from different manufacturers meeting MIL-PRF-19500/578 specifications. Verify pinout compatibility and electrical parameters before substitution. Alternative packages like SMD may require adapter considerations if the original design uses through-hole mounting.