MMBF4393 Discrete Semiconductor Products

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
FET Type:	N-Channel
Voltage - Breakdown (V(BR)GSS):	30V
Drain to Source Voltage (Vdss):	30V
Current - Drain (Idss) @ Vds (Vgs=0):	5mA @ 20V
Voltage - Cutoff (VGS off) @ Id:	500mV @ 1nA
Input Capacitance (Ciss) (Max) @ Vds:	14pF @ 20V
Resistance - RDS(On):	100 Ohms
Power - Max:	350mW
Operating Temperature:	-55°C ~ 150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	TO-236-3, SC-59, SOT-23-3
Supplier Device Package:	SOT-23-3
Base Part Number:	MBF4393

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Introduction

MMBF4393 is a kind of JFET transistors, manufactured by ON Semiconductor in the TO-92 package. It consists of five pins, G, S, D, G1 and B. This type of mainstream JFET is widely used in applications requiring voltage and current rating parameters beyond what discrete BJT transistors can offer. In this article, we will discuss the application fields and working principle of the MMBF4393.

Application Field

MMBF4393 can be used in many different areas. It is most commonly used as an analog switch and amplifier circuit for various kinds of audio, video, communication and other electronic circuits. For instance, it can be used as an input or output buffer in audio amplifiers, or as attenuator in video amplifiers. It can also be employed in telecom and industrial control systems.Apart from its traditional usage, MMBF4393 can also be used as a low-noise amplifier, oscillator, voltage regulator, limiting amplifier, filter and mixer. Furthermore, it can be used in the following four special applications,

• Mixers – Covers a wide range of frequency including broadcast and cellular frequencies.
• Analog Multipliers – Used as a building block of many electronic circuits.
• Logarithmic Amplifier – Used to convert analog signals into digital signals.
• Frequency Shifter – Used for shifting the frequency of a signal.

Working Principle

MMBF4393 consists of five pins, G, S, D, G1 and B. G and S are the gate and source respectively. D is the drain, and G1 and B are the gate and source respectively.This transistor works based on the principle of reverse-bias of gate and source. When a negative voltage is applied to the gate and source, the channel created by them between the drain and source gets pinched off, thus decreasing the current flow. This results in an enhancement mode transistor, where the output is inversely proportional to the input.When the gate and source are connected, they form a reverse-biased diode. This diode prevents the transistor from saturating, allowing the output to be relatively linear over the input voltage ranges.

Conclusion

To conclude, the MMBF4393 is a kind of JFET transistors manufactured by ON Semiconductor that is widely used in different applications. It find use in analog switches and amplifiers, low-noise amplifiers, oscillators, voltage regulators, limiters, filters and mixers. Its working principle is based on the reverse-bias of gate and source. Thus, with the advantages of compact size, high dynamic range and high speed, MMBF4393 is the first choice in switching and amplifying.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description