Series:	--
Packaging:	Tube
Part Status:	Obsolete
Transistor Type:	NPN
Current - Collector (Ic) (Max):	200mA
Voltage - Collector Emitter Breakdown (Max):	300V
Vce Saturation (Max) @ Ib, Ic:	1.5V @ 5mA, 50mA
Current - Collector Cutoff (Max):	100µA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce:	100 @ 10mA, 10V
Power - Max:	1.25W
Frequency - Transition:	80MHz
Operating Temperature:	150°C (TJ)
Mounting Type:	Through Hole
Package / Case:	TO-225AA, TO-126-3
Supplier Device Package:	TO-126
Base Part Number:	KSC2688

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Introduction

KSC2688YSTSSTU is a type of transistor – bipolar (BJT) – single – designed and manufactured by Sanken Electric, primarily used in consumer electronics (CE) applications. It is a low power discrete transistor device, offering superior stability and superior electrical performance when compared to its competitors. KSC2688YSTSSTU has a wide range of applications, such as driving the baud rates and pulse widths of communication lines, motor control, and switching and amplifier circuits.

Application Field and Working Principle

KSC2688YSTSSTU consists of two NPN transistors, and one PNP transistor, hence it can be used in a variety of different configurations. In a common-emitter configuration, KSC2688YSTSSTU acts as an amplifier. Here, it amplifies the input signal by utilizing the biasing properties of the NPN and PNP transistors. The amplifier\'s gain is determined by the biasing current, and the base-emitter voltage. In a common-collector configuration, KSC2688YSTSSTU acts as an emitter-follower. The NPN transistor passes the input signal from its base to its collector, and the PNP transistor passes the input signal from its base to its emitter. The output of the amplifier remains at some constant voltage, and the input signal is delivered to the output with much lower power. In an emitter-coupled pair configuration, KSC2688YSTSSTU can provide a wide range of switching and amplification functions. In this configuration, a signal is fed simultaneously to the emitter of both NPN and PNP transistors. A certain current, called the quiescent current, is allowed to flow through the two transistors, but the signal acts to modulate this quiescent current and thus control the output. With the transistors being biased, the quiescent current changes in response to the signal, allowing the signal to control the output voltage as well as the output current. KSC2688YSTSSTU also has a range of applications in signal conditioning circuits. For instance, it can provide signal isolation, current amplification, and impedance matching. It is also used in the circuits for controlling temperature, timing, and frequency. The device can be connected to the power supply to obtain a constant voltage, and can also be used to control the current consumed by the circuit.

Conclusion

KSC2688YSTSSTU is a low power discrete transistor device designed and manufactured by Sanken Electric, specifically designed for use in consumer electronics (CE) applications. It has a wide range of applications, such as driving the baud rates and pulse widths of communication lines, motor control, and switching and amplifier circuits. KSC2688YSTSSTU consists of two NPN transistors and a PNP transistor, and can be used in a variety of different configurations, including common-emitter, common-collector, and emitter-coupled pair configuration. The device is also used in signal conditioning circuits for signal isolation, current amplification, and impedance matching.

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