The N class feature a frame and body locally designed, but with imported Electro-Motive Division technology in the prime mover, generator and control unit, along with locally produced components such as the bogie frames by Bradken. The class was the first in the world to use the EMD D43 traction motor, similar to but smaller than that used in the C and G classes. Head end power is provided by a separate engine unit in a special compartment located at the number 1 end of the locomotive behind the electrical cabinet. The 240 kW generator provides 415 V 3-phase AC power for train lighting, air conditioning and other carriage requirements.