1. Physical Size/Dimensions: The MAS variant measures 176.0 mm in length, which is 40 mm longer than the 136.0 mm length of the MA variant, while width and height remain unchanged. This increased length in the MAS part likely reflects an optimized internal layout—such as an enhanced thermal path or more generous component spacing—aimed at improving long-term thermal stability and reliability, or possibly accommodating different manufacturing processes and supply chain considerations. This is the most critical distinction and requires verification of the available installation space during system integration. 2. Price: The MAS variant is offered at a lower price point. This cost reduction may result from design optimization, economies of scale in production, or adjustments in material selection, giving the MAS a cost advantage while maintaining equivalent performance. Both parts share identical electrical specifications, protection features, efficiency ratings, isolation class, and operating temperature range, ensuring full functional equivalence.