FML-4202S

Diode Arrays Overview

The FML-4202S is a fast recovery diode manufactured by Sanken Electric, designed for high-efficiency power conversion applications. It features a repetitive peak reverse voltage (VRM) of 200 V and an average forward current (IF(AV)) rating of 20 A. The device achieves a maximum reverse recovery time (trr1) of 40 ns through optimized lifetime control. Key electrical characteristics include a forward voltage drop (VF) of 0.98 V at 10 A and a junction-to-case thermal resistance (Rth(J-C)) of 2.0 °C/W. The component supports a nonrepetitive peak reverse voltage (VRSM) of 200 V and a surge forward current (IFSM) of 150 A. It operates within a junction temperature range of -40 to 150 °C.

Diode Arrays Feature Summary

• Optimized lifetime control enables ultra-fast reverse recovery performance with a maximum trr of 40 ns.
• Low forward voltage drop of 0.98 V contributes to reduced power loss and improved converter efficiency.
• Robust surge capability with a 150 A nonrepetitive peak forward current rating.
• Lead frame construction is bare and compliant with RoHS standards, ensuring environmental safety.

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 status of the FML-4202S datasheet before procurement, as the document explicitly states the part is not recommended for new designs. Confirm that existing inventory meets current project requirements rather than initiating new design-in processes. Ensure compliance with export control regulations if applicable. Check for any updated reliability qualification documents or alternative replacement recommendations from Sanken Electric prior to finalizing orders.

Diode Arrays Selection Notes

Select the FML-4202S only for maintenance or legacy system upgrades where the TO3PF-3L package form factor is strictly required. Evaluate thermal management capabilities carefully, as the 20 A rating depends on case temperature conditions defined in the derating curves. Consider the 2.0 °C/W thermal resistance when designing heatsink interfaces. Verify that the 200 V reverse voltage rating provides sufficient margin for the specific circuit topology's peak inverse voltage stresses.

Diode Arrays Part Context

The FML-4202S belongs to Sanken Electric's lineup of fast recovery diodes intended for general-purpose electronic equipment. It utilizes a common cathode configuration within a single TO3PF-3L package containing two chips. The device is categorized under components for home appliances, office equipment, and telecommunications. Sanken specifies that these products are not intended for aerospace, nuclear, or medical applications requiring extremely high reliability without prior consultation.

Diode Arrays Replacement Considerations

The datasheet does not list specific substitute part numbers. Engineers should consult Sanken Electric sales representatives for current alternatives suitable for new designs, as this component is marked as not recommended for new designs.

Diode Arrays FAQ

What is the maximum reverse recovery time specified for the FML-4202S?

The maximum reverse recovery time (trr1) is 40 ns, measured at IF = IRP = 500 mA with a 90% recovery point at TJ = 25 °C.

How is the FML-4202S configured internally?

The FML-4202S consists of two chips configured as a common cathode arrangement within the TO3PF-3L package.

What is the recommended heatsink mounting screw torque?

The maximum recommended heatsink mounting screw torque is 0.882 N·m, with a minimum of 0.686 N·m.