BSS138

The BSS138 from HUASHUO is a N-channel MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor) that is widely used in various electronic applications due to its efficient performance and compact size.

Physical Characteristics: The BSS138 typically comes in a small, surface-mount package, often in a SOT-23 configuration. This package is characterized by its three leads, which are arranged in a compact layout, making it suitable for space-constrained applications. The body of the MOSFET is usually black or dark gray, with a smooth finish, and the leads are made of metal, often tin-plated for solderability.

Electrical Specifications:

• Voltage Rating: The BSS138 can handle a maximum drain-source voltage (V_DS) of around 50V, making it suitable for low to moderate voltage applications.
• Current Rating: It has a continuous drain current (I_D) rating of approximately 220mA, which allows it to drive small loads effectively.
• Gate Threshold Voltage (V_GS(th)): The gate threshold voltage is typically between 1.3V to 3V, indicating the voltage required to turn the MOSFET on. This low threshold makes it compatible with logic-level signals.
• R_DS(on): The on-resistance (R_DS(on)) is low, usually around 3.5 ohms at a gate-source voltage of 10V, which minimizes power loss during operation.

Performance Characteristics: The BSS138 is known for its fast switching speeds, making it ideal for applications such as switching power supplies, signal switching, and low-side switching in motor control circuits. Its low gate charge allows for quick turn-on and turn-off times, which is essential in high-frequency applications.

Applications: Due to its versatile characteristics, the BSS138 is commonly used in:

• Level shifting circuits
• Low-power amplifiers
• Relay drivers
• LED drivers
• Battery management systems

Thermal Characteristics: The BSS138 has a relatively low thermal resistance, allowing it to dissipate heat effectively during operation. This feature is crucial for maintaining performance and reliability in various environmental conditions.

Conclusion: Overall, the BSS138 from HUASHUO is a reliable and efficient N-channel MOSFET that is well-suited for a wide range of electronic applications. Its compact size, low on-resistance, and fast switching capabilities make it a popular choice among engineers and hobbyists alike.