{"product_id":"robertshaw-620-758-transformer-480-to-24-volt","title":"Robertshaw 620-758 Transformer 480 to 24 Volt","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe ROBERTSHAW 620-758 is a Class II step-down transformer that converts 480 volts AC to 24 volts AC for use in low-voltage HVAC control circuits. Part of the Robertshaw 620 Series, it is designed to power thermostats, contactors, relays, and other 24-volt control components in heating, cooling, and air handling systems. Licensed HVAC technicians install this transformer as an OEM-style replacement or new-installation component when a dedicated 480-volt primary feed is present at the equipment.\u003c\/p\u003e\n\u003cp\u003eThe 620-758 is suited for commercial and light-industrial HVAC applications where equipment operates on a 480-volt supply and requires a reliable 24-volt secondary output for the control circuit. Typical install scenarios include rooftop units, air handlers, and packaged systems fed from 480-volt three-phase or single-phase panels. The unit falls within the 620 Series lineup, which spans universal enclosed and single-voltage open-frame configurations to cover a broad range of field and OEM applications.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e480-volt primary to 24-volt AC secondary for low-voltage HVAC control circuits\u003c\/li\u003e\n  \u003cli\u003eClass II rating limits output power for inherent safety in control-circuit applications\u003c\/li\u003e\n  \u003cli\u003eUL 1585 component recognized by Underwriters Laboratories\u003c\/li\u003e\n  \u003cli\u003ePart of the 620 Series, available in enclosed and open-frame configurations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or new-installation transformer for HVAC systems with a 480-volt primary supply requiring a 24-volt AC control circuit output.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation should be performed by a licensed HVAC technician or qualified electrician. De-energize and lock out the 480-volt supply circuit before beginning any wiring work. Verify the primary voltage at the disconnect matches the transformer rating before energizing. Work must comply with applicable NEC requirements for low-voltage control wiring and transformer installation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrimary Voltage\u003c\/strong\u003e: 480 volts AC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSecondary Voltage\u003c\/strong\u003e: 24 volts AC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eClass\u003c\/strong\u003e: Class II\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCertification\u003c\/strong\u003e: UL 1585 Component Recognized\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: ROBERTSHAW\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 620-758\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ROBERTSHAW","offers":[{"title":"Default Title","offer_id":51468582879538,"sku":"620-758","price":48.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/620transformers.jpg?v=1783918256","url":"https:\/\/voomisupply.com\/products\/robertshaw-620-758-transformer-480-to-24-volt","provider":"Voomi Supply","version":"1.0","type":"link"}