N EMD F3 A/B Locomotive Unpowered B Paragon4 SLSF #5000/5100 (BLI7721)

EMD F3 A/B Locomotive — Unpowered B Unit for SLSF 5000/5100. This unpowered B unit is part of a two-unit EMD F3 A/B set designed to pair with a powered A unit for authentic operation on model railroads. Dressed in prototypical St. Louis-San Francisco Railway livery with road numbers 5000 and 5100, it features road-specific detailing and lighting that reflect the era’s locomotives.

Equipped with a Paragon4 Sound and Control System featuring Rolling Thunder and a dual-mode decoder with back EMF for smooth slow-speed operation in both DC and DCC, this model delivers realistic performance when paired with the A unit. It offers all-wheel electrical pickup, an ABS body with a die-cast chassis for strong tractive effort, and MicroTrains-compatible couplers for reliable coupling. Prototypical details such as multiple MU doors, grab irons and horns, a roof antenna, lift lugs, and authentic lighting help reproduce the look of the original, while operation on Code 55/70/80 track and a minimum radius of 9 inches ensures it fits a wide range of layout configurations, all wrapped in premium painting for convincing appearance.