BUJ103AD,118

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Transistor Type:	NPN
Current - Collector (Ic) (Max):	4A
Voltage - Collector Emitter Breakdown (Max):	400V
Vce Saturation (Max) @ Ib, Ic:	1V @ 600mA, 3A
Current - Collector Cutoff (Max):	100µA
DC Current Gain (hFE) (Min) @ Ic, Vce:	13 @ 500mA, 5V
Power - Max:	80W
Frequency - Transition:	--
Operating Temperature:	150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	TO-252-3, DPak (2 Leads + Tab), SC-63
Supplier Device Package:	DPAK

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BUJ 103AD and 118 Application Field and Working Principle

Introduction

BUJ 103AD and 118 are two types of transistors, also known as Bipolar Junction Transistors (BJT), belonging to the single type. They are known for their compact size, low cost, and good reliability, which make them popular for various electronics applications.

Application Field

The BUJ 103AD and 118 are commonly used in consumer electronics, computers and telecommunications, and industrial control systems, as they are well suited for applications such as signal amplification, switching, signal processing and logic and power amplification.For example, the BUJ 103AD can be found in many car radios, audio amplifiers, and power supplies, as it is suitable for applications where a wide bandwidth is required. It is also widely used in low-voltage/high-current switching applications, such as DC-DC converters, as its low off-state leakage current makes it highly efficient.The BUJ 118, on the other hand, is more commonly used in audio and video applications, thanks to its superior frequency response and fast switching speed. It can also be used in audio power amplifiers and switching power supplies, and is the preferred transistor in these applications due to its efficient switching capabilities.

Working Principle

Bipolar transistors such as the BUJ 103AD and 118 consist of three regions of doped semiconductor material connected to each other.The three regions are the emitter, collector, and base. The base serves as the input, the collector serves as the output, and the emitter switches the collector and base regions by providing a connection between them.When the base is connected to a voltage source, the current flows from the emitter to the collector through the base, which is controlled by the base-emitter junction. This allows for current amplification, as the collector current is far greater than the base current.The BUJ 103AD and 118 feature low collector saturation voltage, which is the voltage level at which the collector current starts to decrease drastically. This makes them particularly suitable for switching applications, as they can provide higher switching speed, efficiency, and reliability.

Conclusion

The BUJ 103AD and 118 are two types of transistors belonging to the single type. They are known for their good performance, compact size, low cost, and reliability, which make them popular in various electronics applications. They can be used in audio and video applications, power amplifier, audio power amplifiers, and switching power supplies, to name a few. Their working principle is based on the flow of current between the emitter, base, and collector, which is regulated by the base-emitter junction.

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