FDMS0343S

Single FETs, MOSFETs Overview

The FDMS0343S is an N-channel enhancement mode MOSFET from Fairchild Semiconductor's PowerTrench series. It features a maximum drain-source voltage of 25 V and a continuous drain current of 28 A at ambient temperature, rising to 49 A at case temperature. The device utilizes an 8-pin PQFN (5x6) Power56 surface-mount package with dimensions of 5mm x 6mm x 1.05mm. Key electrical parameters include a maximum on-resistance of 2.5 mΩ and a typical gate charge of 27 nC at 10 V. It operates within a junction temperature range of -55 °C to +150 °C.

Single FETs, MOSFETs Feature Summary

• Dual Cool™ packaging technology for enhanced thermal performance
• Low on-resistance for improved efficiency in DC-DC applications
• Surface-mount design suitable for space-constrained PCB layouts

Single FETs, MOSFETs Applications

• DC-DC converter synchronous rectification
• Communication power supply secondary rectification
• High-end server and workstation power management

Single FETs, MOSFETs Procurement Notes

Verify the manufacturer status as Fairchild has been acquired by ON Semiconductor. Confirm the specific datasheet revision matches the required electrical tolerances. Ensure the component is sourced from authorized distributors to guarantee authenticity and traceability. Check for any lead-free or RoHS compliance markings if environmental regulations apply to the final assembly.

Single FETs, MOSFETs Selection Notes

Select this component for low-voltage, high-current synchronous rectification tasks where thermal management is critical. The Power56 package offers superior heat dissipation compared to standard MLP packages. Evaluate the gate charge requirements against the driver capability to ensure optimal switching speeds. Consider the 25V rating margin relative to the actual circuit operating voltage to prevent breakdown.

Single FETs, MOSFETs Part Context

This part belongs to the PowerTrench family, which integrates advanced silicon technology with Dual Cool packaging. This series targets mid-voltage applications requiring high power density. The FDMS0343S specifically addresses the need for lower RDS(on) and better thermal resistance in compact power stages.

Single FETs, MOSFETs Replacement Considerations

Check for direct pin-compatible substitutes within the same PowerTrench series, such as other FDMS variants with similar voltage and current ratings. Verify that any replacement maintains the same 8-PQFN (5x6) footprint and thermal characteristics to avoid PCB redesign.