HO EMD SD40-2 Locomotive KCS #681 (ATH-1237)

This HO-scale EMD SD40-2 locomotive in Kansas City Southern livery is a detailed, fully assembled, ready-to-run model designed for model railroad enthusiasts who want authentic freight power on their layout.

Powered by a heavy die-cast frame and a five-pole motor with flywheels, it delivers smooth, quiet performance with reliable current collection through all-wheel drive. Realistic prototype details include RP25 wheels, see-through cab windows, fine Celcon handrails, photo-etched windshield wipers, and LED lighting with headlights, ditch lights, and beacons where applicable. Sound-equipped variants add an onboard DCC decoder with SoundTraxx Econami and a single speaker for engine, horn, and bell sounds, with NMRA compatibility in DCC mode; non-sound versions are DCC-ready via a 21-pin NEM plug for easy decoder installation. This model is designed for typical hobby layouts (minimum radius around 18 inches, with 22 inches recommended) and uses McHenry scale knuckle couplers, along with detailed fuel tanks, hoses, and other touches to capture the prototype look.