{"title":"HVAC Transformers","description":"","products":[{"product_id":"transformer-120-208-240-480-24-va-75-va","title":"Trade Pro TP-75VA-MULTI Control Transformer 120-208-240-480V Primary 24V Secondary 75VA","description":"\u003ch1\u003eTrade Pro TP-75VA-MULTI Control Transformer 120-208-240-480V Primary 24V Secondary 75VA\u003c\/h1\u003e\n\u003cp\u003eThe Trade Pro HCTY08H2AF02217 (also referenced as TP-40VA) is a versatile single-phase control transformer widely used in HVAC and refrigeration systems. It converts high primary line voltage (120V, 208V, or 240V) down to a stable 24 VAC secondary voltage, which is necessary for safely powering low-voltage control circuits, including thermostats, relays, and gas valves. \u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Voltage Capability:\u003c\/strong\u003e Designed with multi-tap primary inputs to accommodate common residential and light commercial power supplies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStable Low-Voltage Output:\u003c\/strong\u003e Delivers a reliable 24 VAC output to ensure proper function and longevity of sensitive control components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexible Connections:\u003c\/strong\u003e Features both wire leads and quick-connect terminals for versatile and easy installation options.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety Assured:\u003c\/strong\u003e This transformer is a UL recognized component, meeting safety and quality standards. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFeature\u003c\/strong\u003e Specification\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Voltage\u003c\/strong\u003e 120 V, 208 V, 240 V AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecondary Voltage\u003c\/strong\u003e 24 VAC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Rating\u003c\/strong\u003e 40 VA\u003c\/li\u003e\n\u003cli style=\"font-weight: bold;\"\u003e\u003cstrong\u003ePhase Single\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency \u003c\/strong\u003e50\/60 Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnections\u003c\/strong\u003e Wire Leads \u0026amp; Quick Connects\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight \u003c\/strong\u003e~1.5 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCertifications\u003c\/strong\u003e UL recognized, CE\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e🛠️ \u003cstrong\u003eHVAC Depot Pro Tip:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eWhen connecting the primary voltage, observe the color codes: Black is Common, White is 120V, Red is 208V, and Orange is 240V. Only connect the two wires corresponding to your line voltage and ensure that the unused wires are properly capped off with wire nuts to prevent electrical hazards. \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCross-Reference:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Trade Pro (Hartland Controls for some internal components)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlternate Part Numbers:\u003c\/strong\u003e TP-40VA, TP-40VA-A, TP-40VA-QC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross-Compatible With:\u003c\/strong\u003e Packard PF42440, DiversiTech T1404, Jard 4031F\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e CHN (China) \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eModel Compatibility:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis universal replacement transformer is widely compatible as a generic replacement part across numerous HVAC systems by various brands, provided the voltage and VA ratings match the original unit. \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCarrier\u003c\/li\u003e\n\u003cli\u003eBryant\u003c\/li\u003e\n\u003cli\u003eAmana\u003c\/li\u003e\n\u003cli\u003eLennox\u003c\/li\u003e\n\u003cli\u003eRheem\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"TRADEPRO®","offers":[{"title":"Default Title","offer_id":52235262886251,"sku":"817506020063","price":59.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/9683\/9531\/files\/TP-75VA-MULTI.jpg?v=1770749848"},{"product_id":"lennox-78h55-65209700-class-2-transformer-120v-to-24v-30va","title":"Lennox 78H55 65209700 Class 2 Transformer 120V to 24V 30VA","description":"\u003ch1\u003e\u003cstrong\u003eIntroduction: Lennox OEM Focus and System Function\u003c\/strong\u003e\u003c\/h1\u003e\n\u003cp\u003eThe Lennox 78H55 (Model 65209700) is the vital power-conversion \"brain\" for your furnace's control circuitry. As a genuine Class 2 transformer, its primary role is to step down 120VAC line voltage to a safe 24VAC output required for the thermostat, control board, and gas valve. It is a critical component for the Lennox Elite and Merit furnace series, ensuring that the low-voltage safety loop remains energized and stable. By using this specific OEM replacement, you guarantee the electrical isolation necessary to protect sensitive microprocessor-based control boards from high-voltage surges.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine OEM Fit (78H55):\u003c\/strong\u003e Engineered by Lennox for an exact bolt-on replacement, eliminating the need for custom mounting brackets or wire splicing in the blower compartment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFixes \"Dead System\" Issues:\u003c\/strong\u003e Specifically designed to resolve no-power symptoms where the thermostat is blank and the furnace control board shows no LED diagnostic lights.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass 2 Safety Rated:\u003c\/strong\u003e Includes internal thermal overload protection to prevent the transformer from overheating or causing a fire if a low-voltage short occurs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Voltage Regulation:\u003c\/strong\u003e Provides a stable 24V secondary output, which is essential for preventing relay \"chatter\" and noise in 24-volt contactors and solenoids.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM Reliability:\u003c\/strong\u003e Built with high-grade copper windings and a heavy-duty laminated core to ensure long-term durability in high-heat furnace environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Lennox\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Genuine OEM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 65209700 (Cat # 78H55)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 1.5 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrimary Voltage:\u003c\/strong\u003e 120 VAC \/ 60 Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSecondary Voltage:\u003c\/strong\u003e 24 VAC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Rating:\u003c\/strong\u003e 30 VA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePhase\/Hertz:\u003c\/strong\u003e Single-Phase (1PH) \/ 60 Hz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClass:\u003c\/strong\u003e Class 2 Not Wet \/ Class 3 Wet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003e🛠️ HVAC Depot Pro Tip: The \"Short Circuit\" Check\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eBefore installing the new 78H55 transformer, \u003cstrong\u003etake a picture of the primary (black\/white) and secondary (yellow\/blue) wiring.\u003c\/strong\u003e If your previous transformer \"burned out,\" there is likely a short in your thermostat wire or a bad contactor coil. Use a multimeter to check for 0 ohms between the 24V wires and ground. If you find a short, fix it before powering up the new transformer, or you will blow the new unit instantly.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eCross-Reference:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuperseded Numbers:\u003c\/strong\u003e 100057-01, 89K59, 100057-02\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLegacy Numbers:\u003c\/strong\u003e 652097, 68H5501\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrawing Number:\u003c\/strong\u003e LB-53531A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWhite-Rodgers\/Emerson Equivalents:\u003c\/strong\u003e 90-T40F3, 90-290Q\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eModel Compatibility:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eG24\u003c\/strong\u003e (Suffixes: -045, -060, -075, -100, -120)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eG40\u003c\/strong\u003e (Suffixes: -045, -070, -090, -110)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eG50\u003c\/strong\u003e (Suffixes: -045, -070, -090, -110)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eG60\u003c\/strong\u003e (Suffixes: -070, -090, -110)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eG43\u003c\/strong\u003e (Suffixes: -045, -070, -090, -110)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eML180\u003c\/strong\u003e (Suffixes: E, XE, UH)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eML193\u003c\/strong\u003e (Suffixes: UH)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEL180\u003c\/strong\u003e (Suffixes: NE, XE)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":52451507732843,"sku":"66255112286","price":91.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/9683\/9531\/files\/65209700-1.jpg?v=1773418599"},{"product_id":"trade-pro-tp-40va-control-transformer-120-208-240v-primary-24v-secondary-40va","title":"Trade Pro TP-40VA Control Transformer 120-208-240V Primary 24V Secondary 40VA","description":"\u003ch1\u003eTrade Pro TP-40VA Control Transformer 120-208-240V Primary 24V Secondary 40VA\u003c\/h1\u003e\n\u003cp\u003eThe Trade Pro TP-40VA is a versatile, single-phase step-down control transformer used widely in HVAC, refrigeration, and heating systems. It functions by converting standard high line voltage (120V, 208V, or 240V) to a stable 24 VAC control voltage, which powers low-voltage control circuits for components like relays, contactors, and thermostats. \u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMulti-Voltage Input:\u003c\/strong\u003e Accepts multiple primary voltage inputs (120\/208\/240 V) for versatile application in various electrical systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStable 24 VAC Output:\u003c\/strong\u003e Provides a consistent and reliable 24 VAC secondary voltage for powering essential low-voltage control circuits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact and Universal Design:\u003c\/strong\u003e Features a small form factor and multi-tap voltage options, making it ideal for easy replacement across many different setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurable Housing:\u003c\/strong\u003e Constructed with metal and hard plastic to be suitable for both indoor and outdoor environments. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eProduct Details:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch2\u003e\u003cstrong\u003eFeature Specification\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003ePrimary Voltage: 120 V, 208 V, 240 V AC (Multi-tap)\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eSecondary Voltage: 24 VAC\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePower Rating: 40 VA\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003ePhase: Single-phase\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eFrequency: 50\/60 Hz\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eConnections: Wire Leads and Quick Connect Terminals\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eWeight:~1.5 lbs\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCertifications:UL recognized\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003e🛠️ \u003cstrong\u003eHVAC Depot Pro Tip:\u003c\/strong\u003e\n\u003c\/h2\u003e\n\u003cp\u003eWhen wiring this multi-tap transformer, the primary leads are color-coded: Black (Common), White (for 120V), Red (for 208V), and Orange (for 240V). Always ensure you connect the correct input voltage wire to the corresponding primary tap and insulate unused wires with a wire nut to prevent a short circuit. \u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eCross-Reference:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Trade Pro\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlternate Part Numbers:\u003c\/strong\u003e TP-40VA-A, TP-40VA-QC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross-Compatible With:\u003c\/strong\u003e Packard PF42440, DiversiTech T1404, Supco SXT115 \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eModel Compatibility:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThis universal replacement transformer is broadly compatible with low-voltage control circuits in most HVAC, refrigeration, and heating equipment. It can be used as a replacement for units from various brands, including: \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCarrier\u003c\/li\u003e\n\u003cli\u003eBryant\u003c\/li\u003e\n\u003cli\u003eAmana\u003c\/li\u003e\n\u003cli\u003eLennox (Generic replacement, verify specs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"TRADEPRO®","offers":[{"title":"Default Title","offer_id":52451525755243,"sku":"817506020032","price":39.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/9683\/9531\/files\/TP-40VA-A.jpg?v=1770748749"}],"url":"https:\/\/tophvacparts.com\/collections\/hvac-transformers.oembed","provider":"HVAC Parts and Equipment Depot","version":"1.0","type":"link"}