For the PDF version of this article, click here. Motor controllers used to power, stop and control the speed of a variety of motors must deal with a wide variety of surges due to switching events.

Designed for the automotive industry, the OARS series open-air metal element resistors have a power rating of up to 2W at 25¡C, with 1W at 85¡C, and resistance values as low as 0.003½.The design is ...