The MCMA400PD1600PTSF is a four-quadrant, phase-controlled SCR (Silicon Controlled Rectifier) module, manufactured by IXYS. It is designed to provide optimum performance in motor control circuits and other applications requiring accurate current regulation. The module is capable of controlling high power switching up to 1600A, and is rated to 600V with a surge voltage of 690V. It features a bipolar thyristor module construction with two pairs of interphase SCRs, which allow for zero-crossing switching at very low turn-off losses. The module also has a built-in thermal protection, which helps to prevent over-temperature and other damage. It is UL registered, CSA certified, and RoHS compliant. It is suitable for a wide range of applications, including dc drives, industrial motor controls, welding equipment, and battery chargers.