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Description
Junction FETs Low Frequency/ Low Noise
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The parameters and performance indicators of this product are sourced from the internet. In case of discrepancies, please refer to the manufacturer's technical specifications!！
Description
N–Channel Junction Field Effect Transistors, depletion mode (Type A) designed for audio and switching applications.
Features
● N–Channel for Higher Gain
● Drain and Source Interchangeable
● High AC Input Impedance
● High DC Input Resistance
● Low Transfer and Input Capacitance
● Low Cross–Modulation and Intermodulation Distortion
● Unibloc Plastic Encapsulated Package
2N5457 is a small JFET (Junction Field Effect Transistor) transistor. It’s datasheet mentioned that it is most suitable for audio related switching applications. It comes in a three pin TO-92 through hole package. You can see the physical appearance, pinout and the symbol of the 2N5457 JFET in below given image.
Let’s find out what are the key features of 2N5457 JFET transistor.
● High gain N-Channel type
● Drain and source pins are interchangeable.
● High impedance for AC input circuits
● High resistance for DC input circuits
● Low input capacitance and transfer capacitance
● Low intermodular distortion and cross modulation
● Maximum of 25V drain to source voltage
As mentioned above 2N5457 is suitable and recommended for audio related switching applications. Such as small amplifiers like guitar preamplifiers, podium microphone preamplifiers, condenser microphone preamplifiers etc. So let’s find out how to build a simple small guitar pre amplifier using 2N5457 JFET. Such preamplifier circuit is given in below image.
As you can see it only requires very small number of components. 2N5457 JFET transistor does the main task of amplifying the input signal from the guitar pickup. Guitar pickups are electro magnetic devices that outputs a signal in mV range when the strings are moved. This preamp amplifies that mV range signal to a somewhat high amplitude signal so when a power amplifier amplifies it the signal has less noise and distortions. There are two capacitors are used in power rail and in series with the output signal the purpose of these capacitors are to filter out any DC component from the circuit and to bypass the small background noises occurred due to ambient electromagnetic interferences to the guitar pickup. Considering the small amount of components required and lack of difficulty this would be a ideal circuit for a beginner in electronics and for a guitar lover as well.
| QUANTITY | UNIT PRICE | PLUS UNIT PRICE | TOTAL PRICE |
|---|---|---|---|
| ≥1: | US $0.52162 | US $0.46946 | US $0.46946 |
| ≥5: | US $0.41730 | US $0.37557 | US $1.87785 |
| ≥10: | US $0.23995 | US $0.21596 | US $2.15960 |
| ≥20: | US $0.20865 | US $0.18779 | US $3.75580 |
| ≥50: | US $0.18778 | US $0.16900 | US $8.45000 |
| ≥100: | US $0.18257 | US $0.16431 | US $16.43100 |
| ≥200: | US $0.17735 | US $0.15961 | US $31.92200 |
| ≥500: | US $0.17214 | US $0.15493 | US $77.46500 |
| ≥1000: | US $0.16692 | US $0.15023 | US $150.23000 |
Substitute (equivalent) Product
| Substitute Product | Brief Description |
|---|---|
| J201 | Low-noise JFET designed for audio and high-frequency applications. |
| MPF102 | General-purpose JFET used for RF and VHF frequency applications. |
| 2N3819 | General-purpose N-channel JFET for RF/IF amplifiers and mixers. |
| BF245A | Low-noise N-channel JFET suitable for applications requiring low distortion. |
| PN4392 | High-frequency amplifier JFET with low noise and high gain. |
| 2N5486 | General-purpose N-channel JFET for low-level audio and high-frequency applications. |
| J113 | N-channel JFET with high transconductance, used for audio and general-purpose applications. |
| NTE312 | Low-noise, high-gain JFET designed for high-frequency and low-level amplifier applications. |
| 2SK117 | Low-noise, high-input impedance N-channel JFET for audio frequency and low-level preamplifier applications. |
| MFE3007 | RF amplifier N-channel JFET with low noise figure for VHF applications. |
Product Usage
The 2N5457 is an N-channel JFET (Junction Field-Effect Transistor) widely used in various electronic circuits due to its high input impedance and low noise characteristics. Here are some typical circuits where you might find the 2N5457 in use:
Amplifiers:
Buffer Stages:
Oscillators:
Switching Circuits:
Active Filters:
Signal Modulators:
Noise Generators:
When using the 2N5457 in any of these applications, it's important to take into account its specifications such as V_GS (gate-source voltage), I_DSS (drain-source saturation current), and its cut-off characteristics to ensure it operates within its optimal range. Always refer to the datasheet for specific parameters and application guidelines.
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2N5457
2N5457 has several brands around the world that may have alternate names for 2N5457 due to regional differences or acquisition. 2N5457 may also be known as the following names:
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