FCX491TA Discrete Semiconductor Products

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Transistor Type:	NPN
Current - Collector (Ic) (Max):	1A
Voltage - Collector Emitter Breakdown (Max):	60V
Vce Saturation (Max) @ Ib, Ic:	500mV @ 100mA, 1A
Current - Collector Cutoff (Max):	100nA
DC Current Gain (hFE) (Min) @ Ic, Vce:	100 @ 500mA, 5V
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:	FCX491

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FCX491TA application field and working principle

The FCX491TA transistor is a type of bipolar junction (BJT) transistor which can be classified under the Single transistors category. It is a high current PNP transistor that is also suitable for a wide range of medium power applications and even power switching applications.This transistor features a high current handling of up to 20 Amp with a very low collector-emitter saturation voltage and good switching times. It also has a good frequency response and high breakdown voltage. The structure of this transistor is very simple, consisting of two N-type regions sharing a P-type layer and a gate terminal between the two.The operation of the FCX491TA is based on the principles of an NPN transistor but can be operated in the same manner as a PNP transistor. When the base terminal of the transistor is forward biased, electrons are attracted to the P-side region in the collector-base junction. This leaves the P-side region very lightly doped which sharpens the cut-off in the current-voltage characteristics. The electron flow from the base to the collector is the result of a small current which is called the "carrier" current.These carriers are also responsible for the base current and the collector current. The current gain of the FCX491TA is determined by the ratio of the current flowing through the collector-base junction to the current flow through the base terminal. This ratio is known as the "transistor gain" or "base current amplification factor".Due to the high current handling and low saturation voltage, the FCX491TA is an ideal transistor for medium power applications such as power amplifiers and power switching applications. These transistors can also be easily connected in series, which makes them suitable for very high voltage switching applications.In addition to power amplifiers and power switching devices, the high frequency response of the FCX491TA makes it suitable for various other applications such as amplifiers for radio receivers, audio amplifiers, and communication receivers. The FCX491TA can also be used for oscillators and time delays.The FCX491TA is a reliable and robust device which is available in a variety of package configurations including TO-126, TO-220, and DPAK. This transistor is usually available off-the-shelf, which makes it easy for designers to incorporate into their designs. In summary, the FCX491TA is a high current PNP transistor that is suitable for a variety of applications including power amplifiers, power switching, communication receivers, oscillators, and time delays. It is a robust and reliable device that is available off-the-shelf in a variety of package configurations.

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