Blue Chip® Automotive Duty Motors by Marathon Electric


Marathon Electric’s Blue Chip® Automotive Duty Motors are designed to exceed the toughest standards in the automotive industry. These totally enclosed fan-cooled motors feature severe duty construction, inverter duty ratings, and advanced insulation systems. Built with rugged reliability and industry-leading efficiency, they offer long-lasting performance in demanding applications such as metal cutting, forming, and assembly.

Key Points

  • Severe Duty Construction: Features include internal/external epoxy coatings, brass drain and breather, and oversized bearings for enhanced durability.
  • MAX GUARD® Insulation System: Inverter duty rated with corona-resistant magnet wire and low-stress winding.
  • Energy Efficiency: Exceeds EPAct and NRCan standards, with super-premium POLYREX® EM grease and CEE compliance.
  • Extended Warranty: 3-year warranty for Severe Duty and 5-year warranty for IEEE-841 models.
  • Industry Compliance: Meets specifications from Ford (EM-1), General Motors (7E-TA, 7EQ, 7EH), and DaimlerChrysler (NPEM-100, 105).
  • Vibration & Noise Control: Each motor is balanced with test data provided and meets strict sound and vibration limits.
  • U-Frame Versatility: Designed for 3/4 to 100 horsepower applications with full cast iron construction.
  • CSA & UL Certifications: Certified for hazardous locations and spike resistance under NEMA MG-1, Section IV, Part 31.