2N3055 NPN Power Transistor (TO-3 Metal Package)

Few transistors have stayed in continuous production as long as the 2N3055, a high-current NPN power transistor that's been the backbone of linear power supply regulators and classic audio amplifier output stages for decades. Its TO-3 metal can package bolts directly onto a heat sink for serious thermal dissipation, the exact setup these higher-power analog circuits depend on, making it the right choice for restoring a vintage design or building a new circuit around a part with that much of a track record.