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BSS138 N-Channel Enhancement Mode MOSFET SOT-23 SMD Package

SKU: LKZYINWCQT
The BSS138 is a widely used N-Channel Enhancement Mode MOSFET designed for low-voltage and low-current switching applications. Packaged in a compact SOT-23 Surface Mount Device (SMD) package, the BSS138 is ideal for space-constrained electronic designs such as portable devices, embedded systems, communication modules, and microcontroller-based projects. One of the most notable features of the BSS138 is its low gate threshold...
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Specifications

Specifications:

Device Type: N-Channel MOSFET
Part Number: BSS138
Drain-Source Voltage (VDS): 50V
Gate-Source Voltage (VGS): ±20V
Continuous Drain Current (ID): 200mA (Typical)
Pulsed Drain Current (IDM): Up to 800mA
Gate Threshold Voltage (VGS(th)): 0.5V to 1.5V (Typical)
Drain-Source ON Resistance (RDS(on)): Low ON-state resistance
Power Dissipation: Approximately 350mW
Operating Temperature Range: -55°C to +150°C
Package Type: SOT-23
Mounting Type: Surface Mount (SMD/SMT)
Number of Pins: 3
Package Material: Molded Plastic
Weight: Lightweight

Additional Resources

BSS138 N-Channel Enhancement Mode MOSFET.PDF

FAQ

1. What is the BSS138 N-Channel Enhancement Mode MOSFET?

The BSS138 is a small-signal N-Channel Enhancement Mode MOSFET housed in a compact SOT-23 surface-mount package. It is widely used for switching, level shifting, load control, and low-power MOSFET applications in electronic circuits.

2. What are the key features of the BSS138 MOSFET?

The BSS138 offers low gate threshold voltage, fast switching performance, low on-resistance, low power consumption, and compatibility with logic-level control signals from microcontrollers operating at 3.3V or 5V.

3. What are the common applications of the BSS138 MOSFET?

The BSS138 is commonly used in bidirectional logic level converters, microcontroller interfacing, load switching, power management circuits, battery-powered devices, LED control circuits, and signal switching applications.

4. Why is the BSS138 popular for logic level shifting?

The BSS138 has a low gate threshold voltage, allowing it to switch effectively with low-voltage logic signals. This makes it ideal for bidirectional level shifters used between 3.3V and 5V devices such as microcontrollers, sensors, and communication modules.

5. What are the advantages of the SOT-23 package?

The SOT-23 package is compact, lightweight, and suitable for automated PCB assembly. It saves board space while providing reliable electrical and thermal performance, making it ideal for portable and high-density electronic designs.

View full product details

The BSS138 is a widely used N-Channel Enhancement Mode MOSFET designed for low-voltage and low-current switching applications. Packaged in a compact SOT-23 Surface Mount Device (SMD) package, the BSS138 is ideal for space-constrained electronic designs such as portable devices, embedded systems, communication modules, and microcontroller-based projects.

One of the most notable features of the BSS138 is its low gate threshold voltage, which allows it to be driven directly by logic-level signals from 3.3V and 5V microcontrollers. This characteristic makes it a popular choice for bidirectional logic level converters, enabling communication between devices operating at different voltage levels.

The MOSFET offers fast switching performance, low power consumption, and reliable operation, making it suitable for load switching, power management, signal routing, and interface circuits. Due to its versatility and affordability, the BSS138 is commonly found in development boards, sensor modules, and DIY electronics projects.

Features

  • N-Channel Enhancement Mode MOSFET
  • Compact SOT-23 surface-mount package
  • Low gate threshold voltage
  • Logic-level compatible operation
  • Fast switching performance
  • Low power consumption
  • Low ON-state resistance
  • Suitable for 3.3V and 5V logic systems
  • High input impedance
  • Ideal for automated PCB assembly