Rare and hard to find New Old Stock (NOS) inventory. We are selling these at a fraction of the retail price. Hurry, limited quantities. The 2N3723 is a silicon planar epitaxial NPN transistor. They are designed for high speed switching application at collector current up to 500mA, and feature useful current gain over a wide range of collector current, low leakage currents and low saturation voltage. TO-59 package. Manufactured by SCA.