The Surface Mount Device 1 (SMD-1) package represents anothther step in the continual evolution of surface mount technology. Designed to be a close replacement for the TO-3 package, the SMD-1 will give designers the extra flexibility they need to increase circuit board density. International Rectifier has engineered the SMD-1 package to meet the specific needs of the power market by increasing the size of the termination pads, thereby enhancing thermal and electical performance.