BSS138 Transistor

Product Overview

The BSS138 transistor belongs to the category of field-effect transistors (FETs). It is commonly used for switching and amplification in various electronic circuits. The BSS138 offers characteristics such as low threshold voltage, high input impedance, and low power consumption. It is typically available in small surface-mount packages and is widely used in applications requiring compact designs.

Package and Quantity

The BSS138 transistor is commonly available in small surface-mount packages such as SOT-23 and SOT-323. It is often supplied in reels or tape and reel packaging, with quantities varying based on manufacturer specifications.

Specifications

• Drain-Source Voltage (VDS): 50V
• Continuous Drain Current (ID): 200mA
• Total Power Dissipation (PD): 360mW
• Threshold Voltage (VGS(th)): 1.5V - 3.0V
• Input Capacitance (Ciss): 35pF
• Output Capacitance (Coss): 15pF
• Reverse Transfer Capacitance (Crss): 7pF

Pin Configuration

The BSS138 transistor typically has three pins: Gate (G), Drain (D), and Source (S). The pin configuration is as follows: - Gate (G) - Pin 1 - Drain (D) - Pin 2 - Source (S) - Pin 3

Functional Features

The BSS138 transistor operates as a voltage-controlled switch or amplifier. When a suitable voltage is applied to the gate terminal, it allows current to flow between the drain and source terminals. This functionality makes it suitable for use in digital and analog circuits.

Advantages and Disadvantages

Advantages

• Low threshold voltage enables compatibility with low-voltage systems.
• High input impedance minimizes loading effects on driving circuits.
• Small package size facilitates space-constrained designs.

Disadvantages

• Limited maximum drain-source voltage compared to other FETs.
• Moderate output capacitance may impact high-frequency performance in certain applications.

Working Principles

The BSS138 transistor operates based on the principle of field-effect control. By applying a voltage to the gate terminal, the conductivity between the drain and source terminals can be modulated, allowing for precise control of current flow.

Application Field Plans

The BSS138 transistor finds extensive use in various applications, including but not limited to: - Portable electronic devices - Battery management systems - Signal switching circuits - Audio amplifiers - LED lighting control

Alternative Models

Several alternative models to the BSS138 transistor include: - 2N7002 - DMG2302 - AO3400 - SI2302

These alternatives offer similar electrical characteristics and package options, providing flexibility in design and sourcing.

In conclusion, the BSS138 transistor is a versatile component with a wide range of applications, offering a balance of performance and compactness. Its unique characteristics make it well-suited for modern electronic designs across various industries.

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