DurA-Tek brushless dc motors offer a compact and rugged solution for demanding cycle applications on heavy-duty transit buses, construction, and off-highway vehicles. A 3.0-in (76.2-mm) outside motor diameter and standard two-wire electrical hookup enable the motors to replace similarly sized brush-commutated dc versions while improving performance and extending life. The motors are designed for 40,000 h of service and integrate drive electronics to promote motor controllability in a smaller package. Onboard motor controls deliver various features, including multispeed operation, over-current control, locked-rotor protection, reverse polarity protection, transient over-voltage protection, and over-temperature shutoff. The 12/24-V brushless dc motors can achieve continuous torque from 0.1 to 0.3 lb·ft (0.14 to 0.41 N·m) and speeds from 2927 to 4400 rpm and are designed to resist the water spray, rain, humidity, salt, fog, shock, and vibration associated with harsh environments.