The Tekronix 371 Programmable Curve Tracer, the industry leader in high power curve tracers, is used for testing a wide variety of power semiconductors. It performs DC parametric characterization of thyristors, SCRs, IGBTs and power MOSFETs. The high voltage collector mode permits testing the Off-Characteristics of a device up to 3,000 volts. The pulsed high current collector mode provides output current pulses greater than 400 amps peak for testing On-Characteristics. It also permits high power testing up to 3,000 watts.