The SM 2050 is an ultra-heavy-duty 24-Volt Alternator Rotor (Armature Assembly) specifically engineered for the high-capacity alternators used in Komatsu PC 300 Series Excavators (including PC 300-6, PC 300-7, and PC 300-8). Given the larger frame and higher hydraulic/electronic demands of the 30-ton class machines, this rotor is built with a reinforced core and higher magnetic flux capacity compared to smaller excavator models.