2SK209-GR N-Channel Low-Noise JFET, SMD TO-236
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Prices updated: 13 Oct 2026
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About this product
The 2SK209-GR is a surface-mount N-channel junction field-effect transistor (JFET) in a TO-236 package. It is intended for low-noise audio-frequency stages such as microphone preamplifiers and input buffers. As a depletion-mode JFET, it conducts at zero gate bias and is turned off by a negative gate-source voltage.
Specifications
- Type
- N-channel JFET / JFET بقناة N
- Package
- TO-236 (SMD) / TO-236 (تثبيت سطحي)
- VGDS
- -50 V
- Drain current Id
- 10 mA
- Rank
- GR
- Application
- Low-noise audio frequency / ترددات صوتية منخفضة الضوضاء
Frequently asked questions
Is the 2SK209-GR a MOSFET?
No. It is a junction FET (JFET), which is controlled by the gate-source junction voltage rather than an insulated gate. Its pinout and biasing differ from a MOSFET, so check the datasheet pinout before wiring.
How is an N-channel JFET like this usually biased?
A common method is self-bias, where a resistor between the source and ground makes the gate sit at or below source potential. The gate must not be driven positive relative to the source.
