1N6621US/TR

Overview

The Microchip Technology 1N6621US/TR is a single fast recovery rectifier diode designed for surface mount applications. It features a maximum DC reverse voltage (Vr) of 400 V and an average forward rectified current (Io) of 2 A. The device exhibits a typical reverse recovery time (trr) of 45 ns, classifying it as a fast recovery component. Forward voltage drop (Vf) is specified at 1.6 V when conducting 2 A. Reverse leakage current is limited to 500 nA at the maximum rated voltage. The unit operates within a junction temperature range of -65°C to +150°C and is housed in a D-5A SQ-MELF package.

Feature Summary

• Fast recovery performance with a typical reverse recovery time of 45 ns for efficient switching operations
• Surface mount construction in a compact SQ-MELF D-5A package for automated assembly
• High thermal stability supporting junction temperatures up to +150°C
• Robust 400 V reverse voltage rating suitable for general power rectification

Applications

• High-frequency AC/DC converter circuits
• Free-wheeling diodes in switch-mode power supplies
• Snubber circuits in inductive load protection
• General purpose rectification in industrial electronics

Procurement Notes

Verify the specific ordering suffix to confirm the tape and reel packaging configuration required for your assembly line. Confirm RoHS compliance status, as this specific part number may not meet current environmental directives depending on the manufacturing date code. Cross-reference the manufacturer's latest datasheet revision to ensure all electrical parameters match your design specifications before finalizing procurement orders.

Selection Notes

Select this component when a surface mount fast recovery rectifier with a 400 V blocking capability is required. Ensure the circuit peak inverse voltage does not exceed the 400 V limit. Verify that the PCB footprint matches the D-5A SQ-MELF package dimensions. Consider the 45 ns recovery time for high-frequency applications where standard recovery diodes would cause excessive switching losses or heat generation.

Part Context

This component belongs to the 1N6621 series of fast recovery rectifiers manufactured by Microchip Technology. It serves as the surface mount equivalent to through-hole variants like the JANTX1N6621. The US/TR suffix indicates the specific surface mount encapsulation and reel packaging format. It is distinct from Zener diodes or switching diodes within the broader 1N66xx numbering system.

Replacement Considerations

Direct functional substitutes include other 400 V, 2 A fast recovery rectifiers in compatible SMD packages. Verify pinout compatibility and thermal resistance characteristics. Check if alternative manufacturers offer components with identical 45 ns recovery times and 1.6 V forward voltage drops to ensure seamless integration without redesigning the PCB layout.