The SM 7843 Alternator Rotor Assembly is a heavy-duty, high-output electrical component specifically engineered for the 120 Amp Lucas-style (L. Type) charging systems found in the Tata Prima range of world-class trucks. As the rotating heart of a high-capacity 24V system (often utilizing 120A alternators for demanding applications), this rotor is precision-wound to support the massive electrical architecture of the Prima’s advanced telematics, air-conditioning, and multi-unit lighting systems.