The major difference in design which allows for enhanced power dissipation performance and thermal cycling performance is the geometry of the parts. While typical standard thick-film chip resistors have the wraparound terminations on the short sides of the component (shown here in the top tight), RCL series resistors are designed with the terminations on the long sides of the component (shown here on the left and below). This configuration is known as “long side termination” or “wide terminal”. It is also sometimes referred to as “reverse geometry”.