FFA20U120DNTU

Diode Arrays Overview

The FFA20U120DNTU is a fast recovery rectifier manufactured by onsemi, formerly Fairchild Semiconductor. It features a dual common cathode configuration housed in a TO-3P package for through-hole mounting. Key electrical specifications include a maximum repetitive reverse voltage of 1200 V and an average forward current rating of 20 A. The device exhibits a typical forward voltage drop of 3.5 V at rated current and a maximum reverse leakage current of 10 uA. It supports a maximum surge current of 60 A and has a typical reverse recovery time of 100 ns. The component operates within a temperature range of -65°C to +150°C junction temperature.

Diode Arrays Feature Summary

• Dual common cathode configuration suitable for bridge or push-pull topologies
• Fast recovery characteristics with 100 ns typical reverse recovery time
• High thermal stability supporting operation up to 150°C junction temperature
• Robust mechanical construction in a TO-3P through-hole package

Diode Arrays Applications

• High-frequency switching power supplies
• Industrial motor drive inverters
• Uninterruptible power supply (UPS) systems
• DC-DC converter output rectification

Diode Arrays Procurement Notes

Verify the manufacturer origin carefully, as onsemi acquired Fairchild Semiconductor's discrete product line. Confirm that the specific suffix 'DNTU' matches the required tube packaging and lead form. Check for obsolescence status or lifecycle notices, as older Fairchild part numbers may have transitioned to onsemi branding or updated revision codes. Ensure compatibility with existing PCB footprints for the TO-3P package.

Diode Arrays Selection Notes

Select this component when a high-voltage, high-current fast recovery diode is required in a standard through-hole package. The 1200 V rating provides sufficient margin for most industrial AC-DC conversion applications. Compare the 20 A current rating against peak load requirements to ensure adequate derating. Consider the TO-3P package size constraints and thermal management needs compared to surface-mount alternatives.

Diode Arrays Part Context

This device belongs to the FFA series of ultra-fast recovery diodes originally developed by Fairchild Semiconductor. Following onsemi's acquisition of Fairchild, these parts are now distributed under the onsemi portfolio. The FFA series is designed for high-efficiency power conversion applications requiring low reverse recovery charge. The TO-3P package offers superior heat dissipation capabilities compared to smaller plastic packages.

Diode Arrays Replacement Considerations

Direct substitutes include the onsemi FFA20U120DNTU (current branding). Other compatible devices from different manufacturers must match the 1200 V / 20 A / TO-3P specifications. Verify pinout compatibility and thermal resistance values before substitution.