Industrial Motor Control and Renewal Parts Specialists Since 1977! MAG-TROL specializes in motor control and circuit breakers to the industrial, OEM, contractor, and equipment maintenance markets. Our experienced sales has many years of experience in the electrical supplies field. This expertise allows us to quickly and accurately identify and locate even hard-to-find and obsolete electrical products. As an authorized stocking distributors of many manufacturers motor control, contactors, starters, relays, lighting contactors, circuit breakers, and transformers, we are able to quickly supply most of your requirements out of stock.