FZT657TC

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Transistor Type:	NPN
Current - Collector (Ic) (Max):	500mA
Voltage - Collector Emitter Breakdown (Max):	300V
Vce Saturation (Max) @ Ib, Ic:	500mV @ 10mA, 100mA
Current - Collector Cutoff (Max):	100nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce:	50 @ 100mA, 5V
Power - Max:	2W
Frequency - Transition:	30MHz
Operating Temperature:	-55°C ~ 150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	TO-261-4, TO-261AA
Supplier Device Package:	SOT-223
Base Part Number:	FZT657

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FZT657TC is a kind of high-voltage and current control transistor. It is mainly used in the control circuit that needs to detect high voltage object, or in the circuit that needs to be widely used in horizontal or vertical deflection circuit of television. The device provides high collector breakdown voltage and low collector input capacitance.This device belongs to transistors - bipolar(BJT) - single. It uses a three-layer PNPN structure with an integrated collector-emitter-collector mode. It uses two doped surfaces, collector and emitter, to form a semiconductor "sandwich". When current flows through the base, the resistance between the collector and the emitter is reduced. For each type of transistor, the current through the base controls the current through the collector and emitter.The working principles of FZT657TC are as follows: firstly, an electric field will be created in the area between the collector and emitter. This electric field can control the number of electrons in the area between the collector and emitter. When the current flows through the base, the electric field will increase, the electrons will move from the emitter to the collector and therefore, a big current is created from the collector to the emitter which is called the collector current. Secondly, when the base current increases, the collector-base region is given a greater potential drop and therefore the collector current decreases. Finally, when the base current decreases, the collector-base region is given a smaller potential drop and the collector current increase.FZT657TC offers a wide range of applications in both commercial and industrial use. Because of its high voltage, it can be used in the control circuit that needs to detect high voltage objects. Additionally, it can be widely applied in the horizontal or vertical deflection circuit of television. Additionally, it can be used in other circuit control and switching applications.FZT657TC is the development of bipolar transistors in recent years. Its advantages such as high power, fast operating speed, adjustable current conduction threshold, low hysteresis voltage, better current transfer ratio and strong linear characteristic in a small range of current can all make it very suitable in many applications, such as TV switches, thyristor trigger, wide band amplifiers, high frequency circuits, etc.In conclusion, FZT657TC belongs to transistors - bipolar(BJT) - single, and the working principles of it depend on the electric field between the collector and the emitter and the control of base current. It offers a range of practical applications such as in television switch and control circuit, or in thyristor triggering. Although it has some advantages, it also has some disadvantages, such as its noise stability issue. To ensure it runs stably, one should remember to pay more attention to its related input parameters.

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