The 371A 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. In the R&D lab, the 371A is used for characterization of new designs of power devices, extraction of SPICE parameters, failure analysis and data sheet generation.