MMBFJ201 pinout | dual | adapter | replacement

MMBFJ201 Pinout Equivalent

MMBFJ201 is an N-channel junction FET (JFET) manufactured by onsemi Corporation in a SOT-23 surface-mount package designed for low-noise amplification, high-impedance signal processing. Its low drain current (Idss≈0.5mA) and high input impedance (>1GΩ) make it suitable for precision circuits such as sensor interfaces, audio pre-amplification, etc.But when there is a shortage of devices or design adjustments are planned, electronics engineers need to look for their replacement models.The following sections of this article describe the pin capabilities and interchangeable equivalents of the MMBFJ201.

Pin Definition Explained (SOT-23 Package)

When designing low-noise amplification or high-impedance circuits, replacement devices need to be replaced with consideration for parameter and package compatibility, and may have different priorities, such as cost, performance, or availability.Next, I will provide alternative model points based on parameter similarity, performance optimization, package difference, and price.

Customers can choose MMBFJ202 (ON Semi) or 2SK932 (Toshiba) to replace directly because they are almost the same parameters as MMBFJ201 and are SOT-23 package
If better performance is required, it can be replaced with a MMBF5485 (Fairchild), which provides higher gain and lower noise.

If you want a lower cost, you can replace it with MMBF5457 (DIODES), which is suitable for Idss lax circuits.

MMBFJ202 (ON Semi)

2SK932 (Toshiba)

MMBF5457 (DIODES)