FML-4204S

Diode Arrays Overview

The FML-4204S is a fast recovery diode manufactured by Sanken Electric USA Inc. It features a maximum repetitive peak reverse voltage (VRM) of 400 V and an average forward current (IF(AV)) rating of 20 A. The device achieves a maximum reverse recovery time (trr1) of 50 ns through optimized lifetime control. Electrical characteristics include a maximum forward voltage drop (VF) of 1.3 V at 25 °C and a thermal resistance (Rth(J-C)) of 2.0 °C/W. The component operates within a junction temperature range of -40 to 150 °C and utilizes a TO3PF-3L package.

Diode Arrays Feature Summary

• Optimized lifetime control enables a fast reverse recovery time of 50 ns.
• Dual-chip configuration provides high surge current capability with a single unit.
• Bare lead frame construction ensures compliance with RoHS directives.

Diode Arrays Applications

• Secondary-side rectifier diodes in flyback converters
• Secondary-side rectifier diodes in LLC converters
• Freewheel diodes in offline buck converters
• Freewheel diodes in offline buck-boost converters

Diode Arrays Procurement Notes

Verify the specific revision code on the datasheet before ordering, as manufacturing updates may occur. Confirm that the TO3PF-3L package dimensions align with your heatsink interface requirements. Ensure the design accounts for the non-repetitive peak reverse voltage limits during transient conditions. Check local distribution channels for availability, noting the component status.

Diode Arrays Selection Notes

Select this component when a 400 V blocking capability and 20 A continuous current are required in a compact form factor. The low thermal resistance facilitates efficient heat dissipation via direct mounting. Consider the 50 ns recovery speed for high-frequency switching applications where minimizing reverse recovery losses is critical for system efficiency.

Diode Arrays Part Context

This part belongs to Sanken Electric's fast recovery diode lineup designed for power conversion circuits. It serves as a robust solution for secondary-side rectification and freewheeling duties in isolated and non-isolated topologies. The TO3PF-3L package allows for direct board or chassis mounting, integrating the semiconductor die with a metal tab for thermal management.

Diode Arrays Replacement Considerations

FML-4204S-DSE Rev.1.0

Diode Arrays FAQ

What is the maximum surge forward current rating?

The FML-4204S supports a nonrepetitive peak surge forward current of 100 A for a half-cycle sine wave lasting 10 ms.

How is the thermal resistance defined for this package?

The thermal resistance from junction to case (Rth(J-C)) is specified as 2.0 °C/W, measured at the backside near the screw hole.

What is the maximum reverse leakage current at elevated temperatures?

At a junction temperature of 150 °C and rated reverse voltage, the maximum reverse leakage current is 400 µA.