FMX-12S

Diode Arrays Overview

The FMX-12S is a fast recovery diode manufactured by Sanken Electric. It features a maximum repetitive peak reverse voltage (VRM) of 200 V and an average forward current (IF(AV)) rating of 5 A. The device achieves a maximum reverse recovery time (trr) of 30 ns through optimized lifetime control. Electrical characteristics include a maximum forward voltage drop (VF) of 0.98 V at 2.5 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 enables a fast reverse recovery time of 30 ns for efficient switching applications.
• Dual-chip construction provides high average forward current capability in a compact package.
• Lead frame is bare, lead-free, and RoHS compliant with flammability rated equivalent to UL94V-0.

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 (e.g., Rev.1.2) against the manufacturer's official documentation before finalizing specifications. Confirm that the TO220F-3L package dimensions and mounting screw torque requirements align with the mechanical design constraints of the target assembly. Ensure compliance with environmental directives such as RoHS is documented for the specific production lot.

Diode Arrays Selection Notes

Select this component when a low reverse recovery time is critical for reducing switching losses in power conversion circuits. The 200 V rating suits low-voltage secondary-side applications. Evaluate the thermal performance using the provided derating curves to ensure the junction temperature remains within limits under expected load conditions and case temperatures.

Diode Arrays Part Context

The FMX-12S belongs to Sanken Electric's discrete semiconductor portfolio, specifically designed for general-purpose electronic equipment. It utilizes silicon technology and is housed in a TO220F-3L package. This series supports various power supply topologies requiring robust rectification and fast recovery characteristics for improved energy efficiency.

Diode Arrays Replacement Considerations

Cross-reference electrical parameters such as VRM, IF(AV), and trr with potential substitutes. Verify package compatibility and pinout configuration. Consult Sanken Electric for approved alternative part numbers or updated revisions.

Diode Arrays FAQ

What is the maximum reverse recovery time specified for the FMX-12S?

The maximum reverse recovery time (trr1) is 30 ns, measured at IF = IRP = 100 mA and a 90% recovery point at TJ = 25 °C.

How is the internal structure of the FMX-12S configured?

The FMX-12S consists of two chips integrated into a single package, providing the specified 5 A average forward current rating.

What are the absolute maximum ratings for surge forward current?

The nonrepetitive peak surge forward current (IFSM) is rated at 35 A for a half-cycle sine wave, positive side, 10 ms duration, 1 shot.