1N5621US

Overview

The Microchip Technology 1N5621US is a single-element fast recovery rectifier diode designed for surface-mount applications. It features an A-Package-2 (SQ-MELF) housing and supports a maximum repetitive reverse voltage of 800 V with an average forward rectified current rating of 1 A. The device exhibits a typical forward voltage drop of 1.6 V at full load and maintains a reverse leakage current of 500 nA at rated voltage. Its fast recovery time is specified at 300 ns, enabling efficient switching performance. The component operates reliably within a junction temperature range of -65°C to +175°C.

Feature Summary

• Fast recovery characteristics suitable for high-efficiency switching applications
• Hermetically sealed SQ-MELF surface-mount package construction
• High thermal stability supporting extended operating temperatures up to 175°C

Applications

• High-frequency power supply rectification circuits
• Free-wheeling diode configurations in inductive loads
• DC-DC converter output stages requiring fast switching

Procurement Notes

Verify the specific suffix designation against official Microchip documentation to confirm exact packaging and qualification levels. Confirm RoHS compliance status as military-grade variants often differ from commercial standards. Validate that the SQ-MELF footprint matches the target PCB design constraints before finalizing procurement orders.

Selection Notes

Select this component when high-voltage blocking capability and rapid reverse recovery are required in a compact surface-mount form factor. Ensure the circuit design accommodates the 800 V reverse voltage rating and 1 A continuous current limits. Consider the thermal management requirements associated with the 175°C maximum junction temperature specification during operation.

Part Context

This part belongs to the 1N56xx series of standard and fast recovery rectifiers manufactured by Microchip Technology. The US suffix typically denotes a specific surface-mount variant within this family, distinct from through-hole axial packages. These components are widely utilized in industrial and aerospace electronics where reliability under harsh environmental conditions is critical.

Replacement Considerations

JAN1N5621/TR: Through-hole alternative with similar electrical ratings but different mounting style.