Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Transistor Type:	NPN
Current - Collector (Ic) (Max):	1A
Voltage - Collector Emitter Breakdown (Max):	100V
Vce Saturation (Max) @ Ib, Ic:	600mV @ 100mA, 1A
Current - Collector Cutoff (Max):	100nA
DC Current Gain (hFE) (Min) @ Ic, Vce:	100 @ 250mA, 10V
Power - Max:	1W
Frequency - Transition:	150MHz
Operating Temperature:	-65°C ~ 150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	TO-243AA
Supplier Device Package:	SOT-89-3
Base Part Number:	FCX493

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Introduction

The FCX493TA is a single bipolar junction transistor (BJT) suitable for various applications, including power supply, telecom, and portable audio.

Application Field

The FCX493TA is primarily intended to be used as a switch or amplifier in a variety of power electronics design.In power supply design, it is particularly useful for switching applications due to its very low on-resistance. The transistor’s low gate charge and low gate-to-source capacitance makes it an excellent choice for high-frequency switching applications such as boost and buck converters. The low power dissipation enables it to be efficiently operated in a wide range of working points.In telecom applications, the FCX493TA is ideal for power amplifiers and RF switching applications. It has a low thermal heat dissipation which helps it avoid thermal run away in high power output conditions.The FCX493TA is also well suited for portable audio applications such as headphone amplifiers due to its low power dissipation and high voltage rating.

Working Principle

The FCX493TA is a single junction BJT that consists of two p-type semiconductor layers and one n-type semiconductor layer. The junction between the two p-type layers forms the base and they are connected to an external gate which forms the gate of the transistor. The n-type layer forms the emitter, and the two other parts are the collector.The operation of the transistor is based mainly on the current conducting property of the base-emitter junction. When a control signal is applied to the gate, the base-emitter junction is opened and a current flow from collector to emitter. The amount of current flow depends on the voltage applied.The FCX493TA also has a very low on-resistance and relatively low gate-to-source capacitance, making it ideal for high-frequency switching applications.

Conclusion

The FCX493TA is a single bipolar junction transistor (BJT) suitable for various applications, including power supply, telecom, and portable audio. Its low on-resistance, low gate charge and low gate-to-source capacitance makes it an excellent choice for high-frequency switching applications, while its low power dissipation makes it suitable for telecom and portable audio. The FCX493TA operates by allowing a current flow from collector to emitter when a control signal is applied to the gate, and its amount of current flow depends on the voltage applied.

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