AST4058 (often cross-referenced with related variants like A5T4058) is a vintage PNP silicon transistor originally manufactured by Texas Instruments. Key Technical Overview • Type & Application: It is a Silect* plastic-encapsulated transistor designed primarily for low-level amplifier applications. • Complementary Pairing: It is designed for complementary circuit configurations alongside NPN transistors such as the 2N3707, A5T3711, or the A5T3707 through A5T3711 series. • Packaging: Built with a rugged one-piece molded plastic construction. It features either an in-line lead layout or a standard TO-18 100-mil pin-circle configuration, enabling it to withstand typical wave soldering temperatures during manufacturing without structural degradation. • Historical Context: Information regarding this component is documented in classic engineering references, specifically the Texas Instruments Transistor and Diode Data Book (Bulletin No. DL-S 731) A5T4058 / 2N4058Go to product viewer dialog for this item. vintage low-noise, low-level PNP silicon transistor are outlined below. Technical SpecificationsBased on the original Texas Instruments Transistor Data Book and manufacturing parameters by Central Semiconductor: Central Semiconductor +1ParameterAbsolute Maximum Rating (\(T_A = 25^\circ\text{C}\))Collector-Base Voltage (\[V_{CBO}\])-30 VCollector-Emitter Voltage (\[V_{CEO}\])-30 VEmitter-Base Voltage (\[V_{EBO}\])-6.0 VContinuous Collector Current (\[I_{C}\])-200 mATotal Power Dissipation (\[P_{D}\])360 mW to 625 mW (depending on exact case/leads)Operating & Storage Temperature-65 to +150 °CNoise Figure (NF)Max 5.0 dB (specifically screened for low-noise audio/low-level applications)Pin Configuration (TO-92 / TO-18 format)
