📌What is the Use of BSS138?
The BSS138 is a N-channel enhancement-mode MOSFET designed for low-voltage, low-power applications.
It is widely used in switching circuits, signal amplification, and logic-level conversion due to its small size, low on-resistance, and compatibility with low-voltage control signals.
📌Key Specifications of BSS138
📌BSS138 Features
- Logic-level gate drive (compatible with 2.5V/3.3V/5V systems)
- Fast switching capability for efficient signal control
- Low leakage current for minimal power loss
- Cost-effective and widely available
- Compact SOT-23 package ideal for high-density PCBs
📌BSS138 Pinout
📌Applications of BSS138 Transistor
- Direct Logic-Level Interface: TTL/CMOS
- Drivers: Relays, Solenoids, Lamps, Hammers,Display,Memories,Transistors, etc
- Battery Operated Systems
- Solid-State Relays
✅ BSS138 Equivalents & Replacements
- 2N7002(SOT-23/60V/0.115A)
- AO3400(SOT-23/30V/5.8A)
✅ Compare BSS138 vs 2N7002
The 2N7002 has higher voltage tolerance but lower current capability and higher RDS(on), making it suitable for low-power signal switching, while the BSS138 can handle higher currents and power, making it better for light-load switching and level-shifting applications.
✅FAQS
Q: What is the speed of BSS138 level shifter?
A: The BSS138 level shifter is primarily designed for low- to medium-speed signals, such as I²C, UART, GPIO, and other control lines, with a typical operating speed of approximately 1–2 MHz.
Q: Is BSS138 RoHS compliant?
A: Yes, the BSS138 MOSFET is RoHS compliant.
Q: What is the BSS138 MOSFET used for?
A: The BSS138 transistor is mainly used for logic-level shifting, signal switching, and small load driving in low-voltage systems.
✅Related Products
Why Choose Semiware?
At Semiware, we manufacture and supply high-quality BSS138 MOSFETs and other small-signal transistors for professional and industrial applications.
We ensure reliable performance, consistent availability, and technical support to help you build robust electronic designs.
👉 Visit our official website for datasheets and inquiries:https://en.semiware.com/small-signal-mosfets/bss138/
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