FJX4014RTF

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Transistor Type:	PNP - Pre-Biased
Current - Collector (Ic) (Max):	100mA
Voltage - Collector Emitter Breakdown (Max):	50V
Resistor - Base (R1):	4.7 kOhms
Resistor - Emitter Base (R2):	47 kOhms
DC Current Gain (hFE) (Min) @ Ic, Vce:	68 @ 5mA, 5V
Vce Saturation (Max) @ Ib, Ic:	300mV @ 500µA, 10mA
Current - Collector Cutoff (Max):	100nA (ICBO)
Frequency - Transition:	200MHz
Power - Max:	200mW
Mounting Type:	Surface Mount
Package / Case:	SC-70, SOT-323
Supplier Device Package:	SOT-323

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FJX4014RTF Application Field and Working Principle

FJX4014RTF is a Pre-Biased Single Bipolar Transistor (BJT) developed by Fairchild Semiconductor. With a capacitive silicon-controlled rectifier (SCR), and a two–stage high-frequency transistor, it can be used as a switching circuit and as a clock generator.

Application Field

The FJX4014RTF can be used in various telecom and consumer electronics applications. For instance, it can be applied in power supplies, relays, stereos, and cellular phones. The SCR can be used in solar energy applications, while the two-stage high-frequency transistor can be used in smart cards.In addition, the FJX4014RTF can be used as a power amplifier or a driver for audio systems, digital displays, and other consumer electronic devices, such as home appliances, consumer electronic products, computer systems, and television monitors.

Working Principle

The FJX4014RTF utilizes an SCR as the main component. SCRs, also known as thyristors, are special semiconductor switches that have an anode connected to a gate and a cathode connected to the ground. When a current is passed through the SCR, it causes the gate to open, triggering a voltage drop between the anode and cathode. This drop acts as a switch and controls the current flow. When the current passes through the SCR and reaches the two-stage high-frequency transistor, it decreases the current and allows the voltage to increase. This increase feature is what makes the FJX4014RTF an efficient switch that can be used in various telecom and consumer electronics applications.The FJX4014RTF also has a thermal protection feature that helps protect the device from overheating. When the switch reaches a certain temperature, the thermal protection feature kicks in and decreases the current flow, thereby preventing any damage to the device.Furthermore, the FJX4014RTF includes several protection mechanisms that keep the transistor from operations outside its limit. These protection mechanisms include over-current protection, over-frequency protection, creepage protection, under-voltage protection, and over-voltage protection.

Conclusion

The FJX4014RTF is a single pre-biased Bipolar Transistor (BJT) developed by Fairchild Semiconductor. It combines an SCR and a two-stage high-frequency transistor to form a highly efficient switch that can be used in numerous telecom and consumer electronics applications. The device also has several protection mechanisms that keep the transistor from operations outside its limit and a thermal protection feature that helps protect the device from overheating.

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