The Honeywell (Resideo) AT72D1006 is a commercial-grade 120V to 24V AC step-down transformer designed to provide reliable power for HVAC control systems, including thermostats, gas valves, and relays. This 40VA rated unit is plate-mounted for easy installation directly onto a 4x4 inch junction box. It features color-coded lead wires for primary connections and screw terminals for secondary connections. Built for safety and durability, it includes override protection, is energy-limiting to meet NEMA Standard DC20-1992, and complies with UL 1585, NEC Class 2 (not wet), and Class 3 (wet) requirements

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