The SM 2059 is a premium 24-Volt Alternator Rotor (Armature Assembly) specifically engineered for the high-output alternators used in Volvo EC210 series excavators (including EC210B and EC210 Prime). Designed for the modern 5-Pin terminal configuration, this rotor is built to handle the rigorous duty cycles and precise electronic demands of Volvo's advanced mechatronics and Tier 3/Tier 4 engine platforms.