2N5459 JFET transistor
2N5459 specification
- 2N5459 general-purpose amplifier N-channel JFET transistor device
- Drain-to-gate breakdown voltage (VDG) is 25V
- Gate to source voltage (VGS) is –25V
- Gate to source cutoff voltage (VGS (OFF)) is -2.0 to -8.0V
- Gate to source voltage (VGS) is -4.5V
- Gate forward current (IGF) is 10mA
- Power dissipation (PD) is 625mW
- Input capacitance (Ciss) is 5 to 7pF
- Junction temperature, storage (TJ) / (Tstg) is between -55 to 150℃
- Noise figure (NF) is 3dB
- Low-level audio amplifier device
2N5459 PINOUT
| Pin Number | Pin Name | Description |
| 1 | Drain | The drain terminal is the current inlet of the JFET device |
| 2 | Source | In the source, terminal current flows out from the JFET |
| 3 | Gate | Gate is used to trigger the MOSFET device |
2N5459 Package
The 2N5459 amplifier JFET transistor device has a TO-92 package made of epoxy/plastic material.
TO-92 is a three-terminal small-sized package, they also had higher temperature capacity and compactness which support smaller circuit making.
2N5459 transistor specification/ application description
Here in this section, we explain the electrical specifications of 2N5459 JFET, it is very useful for a better understanding of circuit applications.
Voltage specs
The terminal voltage specifications of the 2N5459 JFET transistor are a drain-to-gate voltage is 25V, a gate-to-source voltage is -25V, and gate to source voltage is -4.5V.
The gate-to-source cutoff voltage value is -2.0 to -8.0V, it is the switching voltage value of the JFET transistor device.
The terminal specs of the IRF5459 JFET transistor indicate that it is a low-level amplification and switching device.
Current specs
The gate forward current value of the IRF5459 JFET transistor is 10mA, and the current value of the device is the load capacity of the transistor.
Dissipation specs
The power dissipation value of the IRF5459 JFET transistor is 625Mw, this value mainly depends on the device package.
Junction temperature
The maximum temperature of the 2N5459 JFET is –55 to +150℃.
Input capacitance
The capacitance value of the 2N5459 JFET transistor is 4.5 to 7.0Pf, the value is made due to the JFET internal layers.
Noise figure
The noise figure value of the 2N5459 transistor is 3dB, the noise value is important for amplifier applications.
2N5459 DATASHEET
If you need the datasheet in pdf please click this link
2N5459 EQUIVALENT
2N5459 JFET transistor has equivalent devices such as MPF102, 2N5457, J201, NTE312, 2N5000, 2N5001s, 2N5640, and 2SK518, each of these devices have the same set of electrical specifications.
We can use them as the equivalent for the 2N5459 transistor, but before that, we need to check and verify the specs such as voltage, current, and noise. Because they are important for amplifier and general-purpose applications.
2N5459 SMD equivalent
The MMBF5459 (SOT-23) is the SMD equivalent of a 2N5459 JFET transistor, and each of their main specifications of them is the same.
2N5459 vs 2N5640 vs NTE312
| Characteristics | 2N5459 | 2N5640 | NTE312 |
|---|---|---|---|
| Source to gate voltage (VSG) | 25V | 30V | 30V |
| Gate to source cutoff voltage (VGS(OFF)) | -2.0 to -8.0V | -1.0 to -6.0V | -1.0 to -6.0V |
| Gate to source voltage (VGS) | -4.5V | -30V | -30V |
| Gate forward current (IG) | 10mA | 10mA | 50mA |
| Power dissipation (PD) | 625mW | 350mW | 360mW |
| Junction temperature (TJ) | -55 to 150°C | -65 to 150°C | -65 to 150°C |
| Input capacitance (Ciss) | 4.5 to 7pF | 10pF | 4.5pF |
| Noise figure (NF) | 3dB | - | 2 to 4dB |
| Package | TO-92 | TO-92 | TO-92 |
Characteristics curves of 2N5459 transistor
The figure shows the noise voltage vs frequency characteristics of the 2N5459 transistor, the graph plotted with noise voltage vs frequency.
At a constant drain to a source voltage value, the curve is plotted on two different drain current values.
The noise voltage is higher at the initial stage and drops at the end with respect to frequency.
The figure shows the transfer characteristics of the 2N5459 transistor, the graph plots with Transconductance vs gate to source voltage.
At a constant drain to source voltage values, the curve plots on two gates to source cutoff voltage values.
2N5459 transistor application
- Switching device applications
- Analog switching applications
- Audio preamp applications
- Sensor applications
- Low gain signal amplifier circuit
