
Component
BSS138 Level Shifter
The BSS138 is a low-threshold N-channel MOSFET ideal for logic level shifting and low-voltage switching. It features low on-resistance (3.5Ω) and is widely used in I2C and SPI applications.
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Component
Quality
100% Genuine
About BSS138 Level Shifter
The BSS138 is a high-performance N-channel enhancement-mode field-effect transistor (MOSFET) manufactured using advanced DMOS technology. It is specifically designed for low-voltage and low-current applications, making it a popular choice for logic level shifting in mixed-voltage digital systems. With a low gate threshold voltage of just 1.5V and a low on-resistance of 3.5Ω, it is perfectly suited for interfacing 3.3V microcontrollers with 5V sensors or peripherals. This component is commonly used in I2C, SPI, and TTL serial communication interfaces to prevent damage to sensitive low-voltage components. Its compact SOT-23 package makes it ideal for space-constrained PCB designs. Choose the BSS138 for reliable, efficient switching and level translation in your next electronics project.
Technical Specifications
| Type | N-Channel Logic Level Enhancement Mode MOSFET |
|---|---|
| Drain-Source Voltage (Vds) | 50V |
| Continuous Drain Current (Id) | 220mA |
| On-Resistance (RDS(on)) | 3.5Ω @ Vgs=10V |
| Gate Threshold Voltage (Vgs(th)) | 1.0V to 1.5V |
| Input Capacitance | 40 pF |
| Package | SOT-23 |
| Pin Configuration | 1-Gate, 2-Source, 3-Drain |
| Operating Temperature | -55°C to 150°C |
| RoHS Compliant | Yes |
Alternative Components
2N7000
BS170
BSS123
SI2302









