NPN HIGH FREQUENCY COMPUTER TRANSISTORS

2N439 and 2N439A are NPN alloy-junction germanium transistors. Their basic NPN nature (high mobility electron flow) renders these transistors capable of very fast response under transient pulse operation. Their design is ideal for switching and flip-flop circuits. They are contained in a welded package equipped with flexible plated leads designed for connection by soldering, welding or socketing. This package has the mechanical dimensions of JETEC outline TO-9. The 2N439Ahas the base connected to the case internally to provide greater dissipation.