NOARK Electric offers a complete range of Molded Case Switches in six frame sizes: M1 – 150A, M2 – 250A, M3 – 400A, M4 – 600A, M5 – 800A, and M6 – 1200A. Each frame size offers a range of interrupting ratings at 240-690 Vac and 250-600 Vdc. Molded Case Switches are only used as disconnect switches.