PowerTech - Manufacturer of silicon power transistors and industrial devices for the military and aerospace markets. Provides custom packaging of own and other manufacturers' chips. Online line card, specifications and application notes. - http://www.power-tech.com/
Semiconductor Technology, Inc. - Manufacturer of transistors specialising in high voltage and dual differential amplifier transistor technology. Online line card, specifications and RFQ. - http://www.semi-tech-inc.com/