The BSS138 is an N-channel logic level enhancement mode MOSFET transistor widely used in low voltage and low current switching applications. It features low on-resistance, low input capacitance, and fast switching speed, making it suitable for small servo motor control, power MOSFET gate drivers, and other switching applications. Typical applications of BSS138 include power switches, motor drives, digital logic circuits, analog circuits and sensor interfaces, etc.
Onsemi BSS138
ONSemi’s BSS138 N-channel logic-level enhancement-mode MOSFET transistor utilizes the company’s proprietary high-cell density DMOS technology and is designed to minimize on-resistance while providing rugged, reliable and fast switching performance.
Onsemi BSS138 Features
The BSS138 is a 50 V 6 Ohms N-Ch Logic Level Enhancement Mode Field Effect Transistor Available in a SOT-23-3 Package.
Product Features:
RDS(ON) = 3.5W@VGS = 10V, ID = 0.22A
RDS(ON) = 6.0W@VGS = 4.5V, ID = 0.22A
Topdiode BSS138
Topdiode’s MOSFET BSS138 PIN to PIN alternative to replace On semi BSS138, Infineon BSS138NH6327, NXP BSS138P etc.
Topdiode BSS138 is a N-Channel Enhancement MOSFET. It’s high cell density, DMOS technology. These products have been designed to minimize on−state resistance while provide rugged, reliable, and fast switching performance.
MOSFET SOT-23 N-Channel BSS138-Topdiode DATA
| Parameter | Symbol | Value | Unit |
| Drain-Source Voltage | VDS | 50 | V |
| Gate-Source Voltage | VGS | ±20 | V |
| Continuous Drain Current (Ta=25℃) | lD | 340 | mA |
| Continuous Drain Current (Ta=70℃) | ID | 272 | mA |
| Pulsed Drain Current | IDM | 1.5 | A |
| Power Dissipation | PD | 0.35 | W |
| Thermal Resistance from Junction to Case(4) | RθJA | 357 | ℃/W |
| Junction Temperature | TJ | 150 | ℃ |
| Storage Temperature | TSTG | -55~+150 | ℃ |
Topdiode BSS138 Applications
Application areas, BSS138 MOSFET is suitable for a variety of application scenarios due to its low on-resistance, low threshold voltage and high-speed switching performance:
1) High-efficiency switching circuit: The fast switching characteristics of BSS138 make it perform well in high-frequency switching circuits and is suitable for high-speed logic circuits in precision electronic equipment.
2) Driver of low-power devices: It can efficiently drive low-power devices, such as micro motors or LED lamps, and is suitable for use in meticulous power management systems.
3) Level adaptation conversion: In multi-level systems, BSS138 is often used for level matching to ensure signal consistency and compatibility between different systems.
4) Battery-powered equipment: such as handheld devices, smart homes, etc., BSS138 can operate in a low-voltage environment to adapt to the voltage sensitivity requirements of modern electronic equipment.
5) Motor driver: Controls the switching and speed of the motor. The high withstand voltage capability and low leakage current of the BSS138 enable stable operation in this application.
6) LED lighting controller: Stably drives LED light and optimizes power usage efficiency.
7) Power management circuit: Used to optimize power usage efficiency, the low on-resistance of the BSS138 helps reduce the heat generated in the on-state.
Topdiode Group is one of the leading MOSFET manufacturers in China. The products include power MOSFET, high-voltage MOSFET, low-voltage MOSFET, etc. The products are widely used in industry, computer, automobile, consumer electronics, telecommunications, and medical fields. It can directly PIN to PIN replace some MOSFETs of brands such as Infineon, On semi, NXP etc.
Related reading：MOSFET SOT-23 N-Channel BSS138-Topdiode
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