HO G2 SD90MAC-H Phase I with DCC and Sound UP #8503 (ATHG27320)

HO Scale G2 SD90MAC-H Phase I locomotive with DCC and sound in Union Pacific livery, number 8503, designed for HO-scale layouts. This detailed model blends Phase I styling with onboard sound and digital command control for realistic operation on a home layout.

Part of the 8500-series—the second and third orders of the SD90MAC-H delivered between 1997 and 1999 before final renumbering to the 8900 series—this unit reflects the era’s UP power. Within this family, variants such as 8509, 8512, and 8520 are modeled with the starter capacitor removed and the End-of-Train device mounted further forward on the fuel tank, illustrating the small production variations visible in the Phase I UP roster.