FMX-23S

Diode Arrays Overview

The FMX-23S is a fast recovery diode manufactured by Sanken Electric. It features a maximum repetitive peak reverse voltage (VRM) of 300 V and an average forward current (IF(AV)) rating of 10 A. The device achieves a maximum reverse recovery time (trr) of 30 ns through optimized lifetime control. Key electrical characteristics include a forward voltage drop (VF) of 1.30 V at 5 A and a junction-to-case thermal resistance (Rth(J-C)) of 4.0 °C/W. The component operates within a junction temperature range of -40 to 150 °C.

Diode Arrays Feature Summary

• Optimized lifetime control for ultra-fast reverse recovery performance
• Dual-chip configuration housed in a single TO220F-3L package
• Lead-free bare lead frame compliant with RoHS standards
• High surge forward current capability for robust operation

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 datasheet revision, currently Rev.1.2 dated Dec. 23, 2024, against your procurement requirements. Confirm that the TO220F-3L package dimensions and mounting screw torque specifications align with your mechanical design constraints. Ensure compliance with the stated environmental regulations, including RoHS and UL94V-0 flammability ratings, prior to finalizing orders.

Diode Arrays Selection Notes

Select this component for applications requiring high-speed switching with low reverse recovery charge. The 300 V rating suits general-purpose power supplies, while the 10 A current capacity supports moderate load requirements. Evaluate the thermal resistance and derating curves to ensure adequate heat dissipation for your specific case temperature conditions. Consider the dual-chip internal structure when calculating total forward voltage drops.

Diode Arrays Part Context

This component belongs to Sanken Electric's fast recovery diode portfolio, designed for efficient power conversion. It utilizes a TO220F-3L surface-mount compatible package, integrating two chips to handle the specified current and voltage ratings. The device is engineered for use in modern switching power supply topologies where minimizing switching losses and improving efficiency are critical design objectives.

Diode Arrays Replacement Considerations

Consult official Sanken Electric documentation or authorized distributors for verified substitute part numbers. Do not assume cross-compatibility with other manufacturers' devices without validating electrical parameters and physical dimensions against the original specifications.

Diode Arrays FAQ

What is the maximum reverse recovery time for the FMX-23S?

The maximum reverse recovery time (trr1) is 30 ns under standard test conditions of IF = IRP = 100 mA at TJ = 25 °C.

How is the FMX-23S internally configured?

The FMX-23S consists of two chips integrated into a single TO220F-3L package, sharing common anode terminals.

What is the thermal resistance between the junction and the case?

The thermal resistance Rth(J-C) is specified as 4.0 °C/W, measured at the back side near the screw hole.