Eaton XTCE400M – Heavy-Duty Auxiliary Contact Block for Large Frame Contactors The Eaton XTCE400M is a side-mounting, high-capacity auxiliary contact block specifically engineered for use with Eaton's largest DIL series contactors, primarily those in the DILM400 frame size. It provides additional, robust contacts for control and signaling circuits in industrial motor control applications that utilize ultra-heavy-duty contactors.