L&T MNX-550 2NO+2NC 550A 3 Pole Power Contactor is a contactor designed for high-current applications. It is available in two models, 2NO+2NC and 2NO+1NC. L&Ts MNX-550 contactors are designed for heavy duty applications. These contactors have a current rating of AC3: 550 Amp and AC1: 650 Amp and are size FR-6. These contactors have a pole of 3 Pole. They also come with auxiliary contacts of 2NO+2NC. The contactors category includes all devices that contact or energize electrical conductors, such as switches, relays and contacts.