The Tektronix 371 is a Programmable High Power Curve Tracer used for testing a wide variety of power semiconductors. The industry standard 371 curve tracer provides dc parameter characterization of transistors, thyristors, diodes, SCRs, MOSFETS, optoelectronic components, solar cells, solid state displays and other semiconductor devices. The 371 provides measurements to compare a device to the manufacturer's specifications, identification of components with the same characteristics and failure analysis. Tektronix 370 series curve tracer.