The increasing demand for Electrical and Electronic Equipment (EEE) and the subsequent rise in e-waste has become a pressing environmental concern. Traditional linear economic models in the EEE manufacturing sector, which emphasize a "take-make-dispose" approach, are not sustainable and contribute to significant environmental degradation. This thesis explores the integration of circular economy (CE) principles with digital twin technology to address the environmental challenges posed by the EEE sector. Through an extensive literature review and expert interviews, this research develops and validates a framework for integrating digital twins into CBMs, aiming to enhance resource efficiency and reduce waste across the product lifecycle. While promising, challenges related to data governance and organizational alignment remain. The Digital Twin Nexus Circular Business Models framework offers strategies to improve sustainability in the EEE sector, aiding manufacturers in transitioning from linear to circular business practices.