Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Transistor Type:	NPN
Current - Collector (Ic) (Max):	500mA
Voltage - Collector Emitter Breakdown (Max):	300V
Vce Saturation (Max) @ Ib, Ic:	500mV @ 2mA, 20mA
Current - Collector Cutoff (Max):	100nA (ICBO)
DC Current Gain (hFE) (Min) @ Ic, Vce:	40 @ 30mA, 10V
Power - Max:	225mW
Frequency - Transition:	50MHz
Operating Temperature:	-55°C ~ 150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	TO-236-3, SC-59, SOT-23-3
Supplier Device Package:	SOT-23-3 (TO-236)
Base Part Number:	MMBTA42

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MMBTA42LT3G Application Field and Working Principle

Introduction

The MMBTA42LT3G is a bipolar junction transistor (BJT) which is a three-terminal device used for amplification and switching among other functions. It is available in a single structure and is offered in the TO-92 package. The MMBTA42LT3G is made with High Voltage Technology and is commonly known as a low voltage device with low leakage and a high switch speed.

Application Fields

The MMBTA42LT3G can be used in applications such as motor control, power switching, audio amplifiers, digital logic levels, and other high-frequency circuits. It can be used as a switch or as an amplifier. It has a low current gain of 10 and a maximum voltage of 45 volts, making it ideal for low-voltage circuits.The MMBTA42LT3G is also used in automotive and telecommunications applications. In automotive applications, it is used to control fuel injectors, to regulate solenoid valves, and to control motors. In telecommunications applications, the MMBTA42LT3G is used in modems, radio transceivers, and satellite hardware.

Structure

The MMBTA42LT3G consists of three terminals, called the emitter terminal, the collector terminal, and the base terminal. The emitter terminal is the negative terminal and is connected to the power source. The collector terminal is the positive terminal and is connected to the load. The base terminal controls the amount of current flowing through the transistor.

Working Principle

The MMBTA42LT3G operates on the principle of base current control. When a small base current is applied, the transistor will allow a much larger collector current to flow. This collector current is amplified by the current gain of the transistor, which is typically around 10.The MMBTA42LT3G is used in both switching and amplifying applications. In a switching application, the transistor is used to switch an electrical signal between two points. The transistor is “on” when the base current is applied. This allows the collector current to flow and the signal to be switched. In an amplifying application, the transistor is used to amplify a weak electrical signal. The current gain of the transistor is used to amplify the signal to a stronger output.

Conclusion

The MMBTA42LT3G is a bipolar junction transistor (BJT) which is a three-terminal device used for amplification and switching among other functions. It is available in a single structure and is offered in the TO-92 package. It is widely used in motor control, power switching, audio amplifiers, digital logic levels, and other high-frequency circuits. The MMBTA42LT3G operates on the principle of base current control and has a current gain of 10. It is used in both switching and amplifying applications.

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