2N4033

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High-speed, high-voltage PNP silicon planar epitaxial small-signal transistor housed in a metal TO-18 can, engineered for core memory drivers, fast switching networks, and low-nois e audio preamplifier stages. Equivalents: 2N4032, 2N2907A (similar core parameters), NTE159. Real-Life Examples: Legacy mainframe computing logic boards, telecommunication line routing arrays, early laboratory oscillographic sweep grids, and vintage high-fidelity audio inputs. Show more