The 2N3637 is a -175V PNP silicon epitaxial planar transistor designed for use as a driver for high-power transistors in general-purpose amplifier and switching circuits. It features a collector-to-base voltage of -175V, an emitter-to-base voltage of -5V, a fall time of 60ns (at VCC = 30V, IB2 = 15mA), and thermal resistances of 175°C/W junction-to-ambient and 35°C/W junction-to-case. Suitable for industrial applications, this transistor provides reliable performance in high-voltage, high-power switching and amplification tasks.