FCX491ATA

Single Bipolar Transistors Overview

The FCX491ATA is a single NPN silicon planar medium power transistor manufactured by Diodes Incorporated. It operates in an SOT-89 surface-mount package with a collector-emitter voltage (VCEO) of 40 V and a continuous collector current (IC) of 1 A. The device features a maximum power dissipation of 1 W, a transitional frequency (fT) of 150 MHz, and a low saturation voltage (VCE(sat)) of less than 500 mV at 1 A. It supports an operating temperature range from -65 °C to +150 °C.

Single Bipolar Transistors Feature Summary

• High continuous collector current capability up to 1 A
• Low saturation voltage for efficient power switching
• RoHS compliant and halogen-free green device construction

Single Bipolar Transistors Applications

• Power MOSFET gate driving
• Low loss power switching

Single Bipolar Transistors Procurement Notes

Verify the specific ordering suffix against official manufacturer documentation before procurement. Confirm that the 'A' suffix corresponds to the standard RoHS-compliant version rather than automotive-grade variants. Ensure packaging quantities match project requirements. Validate component authenticity through authorized distribution channels.

Single Bipolar Transistors Selection Notes

Select this component for applications requiring high current handling in a compact SOT-89 footprint. Consider its complementary PNP counterpart, the FCX591A, for push-pull configurations. Evaluate thermal resistance characteristics relative to the PCB copper area. Verify that the 40 V breakdown voltage meets circuit safety margins.

Single Bipolar Transistors Part Context

This part belongs to the FCX491A series of medium power transistors designed for general-purpose switching and amplification. It utilizes silicon planar technology optimized for surface-mount assembly. The series provides a standardized solution for replacing older through-hole components in modern electronic designs.

Single Bipolar Transistors Replacement Considerations

FCX591A serves as the complementary PNP type within the same series.