BSS138LT3G

Vgs(th) (Max) @ Id:	1.5V @ 1mA
Package / Case:	TO-236-3, SC-59, SOT-23-3
Supplier Device Package:	SOT-23-3 (TO-236)
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 150°C (TJ)
Power Dissipation (Max):	225mW (Ta)
FET Feature:	--
Input Capacitance (Ciss) (Max) @ Vds:	50pF @ 25V
Vgs (Max):	±20V
Series:	--
Rds On (Max) @ Id, Vgs:	3.5 Ohm @ 200mA, 5V
Drive Voltage (Max Rds On, Min Rds On):	5V
Current - Continuous Drain (Id) @ 25°C:	200mA (Ta)
Drain to Source Voltage (Vdss):	50V
Technology:	MOSFET (Metal Oxide)
FET Type:	N-Channel
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

BSS138LT3G is a low voltage single N-channel enhancement mode Field-Effect Transistor (FET) that is typically used in consumer electronics and is capable of driving many types of small-signal loads including solenoid coils and stepper motors. It has a low input impedance, a high current capacity, a simple construction, a low operating voltage, and a fast switching speed. It is a great choice for low-voltage applications that require high efficiency, low power consumption, and a long product life.

Applications

BSS138LT3G is used in a wide variety of consumer electronics and industrial applications. It can be used for motor control, signal amplification, light dimming controls, and switching power supplies. It is often used in home appliances such as air conditioning systems, washing machines, microwaves, and dryers. In addition, it is often used in automotive applications such as headlight dimmers and electric window lifters. It can also be used for medical device applications such as infusion pumps and medical imaging equipment.

Principle of Operation

The BSS138LT3G is an N-channel enhancement mode FET and is constructed of a single N-type silicon semiconductor. It operates on the principle of controlling the flow of electrons, by varying the electric field, between a drain and source electrode in order to switch a load, such as a motor. This field is created by an applied voltage, that causes an accumulation of charge carriers around the gate terminal, forming a depletion region. The width of this region is what controls the flow of electrons through the device.The enhanced mode FETs, such as the BSS138LT3G, are designed to be normally on, meaning the device is always conducting some level of current flow from drain to source. However, when a voltage is applied to the gate terminal, this will cause the width of the depletion region to be reduced, resulting in a decrease of current flow. This decrease in current flow is known as drain-to-source resistance, and is how the BSS138LT3G is able to drive small-signal loads, such as solenoid coils and stepper motors.

Advantages

The BSS138LT3G has many advantages over other FETs, including a low input impedance, a high current capacity and a fast switching speed. It has a maximum drain-source voltage (Vds) of 20V, which is 250% higher than the commonly used 10V of other FETs. This makes it perfect for low-voltage applications such as small household appliances, automotive applications, and medical devices. It also has a fast switching speed, which is 50 times faster than the commonly used JFETs. This makes it an excellent choice for applications that require very high efficiency and low power consumption.Finally, the BSS138LT3G is simple to use and has a low operating voltage of just 1V. This makes it ideal for small, low-power designs. It is also able to operate in a low temperature range, making it perfect for outdoor applications, such as lighting and automotive electronics.

Conclusion

The BSS138LT3G is a popular, low-voltage Field-Effect Transistor (FET) that is often used in consumer electronics and industrial applications. It has many advantages over other FETs, including a low input impedance, a high current capacity and a fast switching speed, making it perfect for low-voltage applications. In addition, it is simple to use and has a low operating voltage, making it ideal for small, low-power designs. It is also able to operate in a low temperature range, making it suitable for outdoor applications. With all these features, the BSS138LT3G is undoubtedly the best choice for FET applications.

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