2N5457

N-channel depletion-mode silicon junction field-effect transistor (JFET) housed in a plastic TO-92 package, universally revered for low-noise high-input-impedance small-signal audio voltage amplification and clean electronic signal switching. Equivalents: 2N5458, 2N5457G, MPF102, BF245, NTE457. Real-Life Examples: Vintage guitar effects pedals (e.g., Boss OD-1, Ibanez Tube Screamer switching circuitry), high-end microphone preamplifier input buffers, and studio mixing console channel strips. [1, 2, 3]