MQ2N4857UB-JFET-NChannel Overview
The MQ2N4857UB is a high-performance N-channel JFET designed for low noise amplification and switching applications. Its robust electrical characteristics make it suitable for precision analog circuits, including audio preamplifiers and signal processing stages. Featuring low input capacitance and stable transconductance, this device ensures minimal distortion and high linearity. The compact SOT-23 package supports easy integration into densely packed PCBs, making it ideal for industrial and instrumentation systems. This JFET is a dependable choice for engineers seeking reliable semiconductor components with consistent performance. More details can be found at IC Manufacturer.
MQ2N4857UB-JFET-NChannel Technical Specifications
| Parameter | Value | Unit |
|---|---|---|
| Device Type | N-Channel JFET | ?? |
| Drain-Source Voltage (VDS) | 30 | V |
| Gate-Source Voltage (VGS) | -30 to 0 | V |
| Drain Current (ID) | 20 | mA |
| Gate Reverse Current (IGSS) | 1 | nA (max) |
| Input Capacitance (Ciss) | 3 | pF (typ) |
| Pinch-Off Voltage (VGS(off)) | -1.5 to -6 | V |
| Power Dissipation (PD) | 310 | mW |
| Package | SOT-23 | ?? |
MQ2N4857UB-JFET-NChannel Key Features
- Low Noise Performance: Ensures high signal integrity in sensitive analog circuits, improving overall system accuracy.
- Wide Voltage Range: Supports up to 30 V drain-source voltage, allowing flexibility in diverse power environments.
- Compact SOT-23 Package: Enables easy PCB integration with minimal footprint, supporting high-density industrial designs.
- Low Input Capacitance: Minimizes signal loss and distortion, critical for RF and high-frequency applications.
Typical Applications
- Audio preamplifiers and low-noise amplification circuits requiring stable gain and minimal distortion for industrial audio equipment.
- Analog switching and multiplexing where low gate leakage current enhances signal fidelity.
- Precision instrumentation for sensor signal conditioning in measurement systems.
- RF front-end circuits where low input capacitance and high linearity support enhanced frequency response.
MQ2N4857UB-JFET-NChannel Advantages vs Typical Alternatives
This N-channel JFET offers superior low noise and minimal gate leakage current compared to typical MOSFET alternatives, enhancing accuracy in sensitive analog circuits. Its stable transconductance and low input capacitance improve signal clarity and reduce distortion. The small SOT-23 package also delivers easy integration in compact industrial designs, providing a reliable and efficient solution for precision amplification tasks.
🔥 Best-Selling Products

Texas Instruments BQ24075 Linear Battery Charger IC – 5mm x 4mm QFN Package

Texas Instruments INA219 Current Sensor Module – SOIC Package, Precision Monitoring

Texas Instruments LM4041 Precision Voltage Reference – SOT-23 Package

Texas Instruments OPA2134 Audio Op Amp – Dual, High-Performance, SOIC-8 Package
MQ2N4857UB-JFET-NChannel Brand Info
The MQ2N4857UB N-Channel JFET is manufactured by IC Manufacturer, a leading global supplier specializing in semiconductor components for industrial and commercial applications. Known for stringent quality control and consistency, the brand ensures that each device meets rigorous standards for electrical performance and reliability. This product line is well-regarded for providing robust analog solutions, supporting engineers in developing high-precision and low-noise electronic systems.
FAQ
What is the maximum voltage rating for this N-channel JFET?
The maximum drain-source voltage (VDS) for the MQ2N4857UB is 30 V. This rating allows the device to operate safely within various voltage environments commonly found in industrial and instrumentation circuits.
🌟 Featured Products

“Buy MAX9312ECJ+ Precision Voltage Comparator in DIP Package for Reliable Performance”

QCC-711-1-MQFN48C-TR-03-1 Bluetooth Audio SoC with MQFN48C Package

0339-671-TLM-E Model – High-Performance TLM-E Package for Enhanced Functionality

1-1415898-4 Connector Housing, Electrical Wire-to-Board, Receptacle, Packaged
How does the input capacitance affect performance in high-frequency applications?
The device features a low input capacitance of approximately 3 pF







