Product Description The STS Parts IN254 Voltage Regulator is a premium aftermarket electronic regulator designed to control the charging system on Denso internal fan alternators used across Kubota, Komatsu, Yale, Gehl, and various industrial and agricultural equipment. Operating on a 12-volt system, this A-Circuit, IG-L terminal regulator provides a stable 14.5V output for dependable battery charging. Its 57.5mm center-to-center mounting ensures a precise OE-style fit for hundreds of alternator models, including Denso 100211 and 101211 series. This unit replaces many OEM and aftermarket equivalents such as Denso 126000-0600 / 0760 / 1160, Toyota 27700-78301, Kubota 15881-64600 / 64601, and Transpo IN254. Perfect for equipment rebuilders, repair shops, or mechanics maintaining compact tractors, forklifts, turf mowers, generators, and small diesel applications. Each part is brand new (not remanufactured) and manufactured to meet or exceed OE performance standards. Specifications Voltage: 12V Set Point: 14.5–14.6V Circuit Type: A-Circuit (Low Side Drive) Terminals: IG-L (Ignition–Lamp) Activation: Ignition Mounting Length: 57.5 mm Polarity: Negative Brush Holder Included: No Rectifier Included: No Adjustable: No Used On: Denso Internal Fan Alternators Condition: New Aftermarket Cross References (Abbreviated) Denso 126000-0600, 126000-0760, 126000-1160 Toyota 27700-78301, 27700-96301 Kubota 15881-64600, 15881-64601 Transpo IN254, IN254SE (self-exciting) Regitar VRH2005-39, MFVR02110 WAI IN254, ACE VR-3354, Cargo 133872 Lester 12197, 12206, 12511, 12531, 12656, 12773, 12855, 22925 Fitment Tip Match the alternator unit number and mount pattern (57.5 mm) before ordering. This unit fits many compact diesel tractors, industrial machines, and motorcycles using Denso IR/IF alternators.