{"product_id":"lennox-100335-51-72w39-genuine-oem-dual-run-capacitor-75-10-mfd-440-vac-round","title":"Lennox 100335-51 (72W39) Genuine OEM Dual Run Capacitor 75\/10 MFD 440 VAC Round","description":"\u003ch1\u003eLennox 100335-51 (72W39) Genuine OEM Dual Run Capacitor 75\/10 MFD 440 VAC Round\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eLennox 100335-51 (Catalog # 72W39)\u003c\/strong\u003e is a premium \u003cstrong\u003eGenuine OEM Dual Run Capacitor\u003c\/strong\u003e designed for high-efficiency \u003cstrong\u003eLennox and Allied Air\u003c\/strong\u003e air conditioning and heat pump systems. This critical electrical component provides the necessary phase-shift and starting torque for both the compressor and the condenser fan motor, ensuring smooth startups and continuous, efficient operation of the outdoor unit. \u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eTechnical Performance:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eRated at \u003cstrong\u003e75 + 10 MFD (microfarads)\u003c\/strong\u003e and up to \u003cstrong\u003e440 VAC\u003c\/strong\u003e, this capacitor is engineered to handle the high-voltage demands of modern residential and commercial HVAC equipment. Being a \u003cstrong\u003eGenuine OEM\u003c\/strong\u003e part, it features high-grade metallized polypropylene film and a non-PCB oil-filled interior for superior heat dissipation. This construction ensures the capacitor maintains its capacitance value under extreme summer temperatures, preventing the \"motor humming\" or \"hard starting\" issues common with low-quality, non-OEM universal alternatives. \u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eKey Features and Function:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDual-Purpose Operation:\u003c\/strong\u003e Simultaneously supports the compressor (75 MFD) and the fan motor (10 MFD) from a single compact canister.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGenuine OEM Reliability:\u003c\/strong\u003e Manufactured to Lennox’s exact electrical tolerances to prevent amperage spikes and extend the lifespan of the motors.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHigh-Voltage Versatility:\u003c\/strong\u003e Rated for 440V, allowing it to safely replace 370V capacitors while providing superior surge protection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety Pressure Interrupter:\u003c\/strong\u003e Features an internal safety disconnect that removes the capacitor from the circuit if internal pressure builds, preventing the casing from rupturing. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eProduct Details and Key Specifications:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 100335-51 (Catalog # 72W39)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Lennox \/ Allied Air (Genuine OEM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Type:\u003c\/strong\u003e Round Dual Run Capacitor\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacitance:\u003c\/strong\u003e 75\/10 MFD (75+10 µF)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 440 VAC (Works for 370V applications)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTolerance:\u003c\/strong\u003e +\/- 5%\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape:\u003c\/strong\u003e Round Canister\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShipping Weight:\u003c\/strong\u003e 1.45 lbs \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003e🛠️ HVAC Depot Pro Tip: The \"Mushroom\" Check\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eWhen inspecting a system that isn't cooling, look at the top of the capacitor where the terminals are located. If the top is bulged or \"mushroomed\" upward, the internal safety interrupter has tripped and the capacitor must be replaced. Always use a discharge resistor or a shielded screwdriver to short the terminals before handling, as capacitors can hold a lethal electrical charge even when the power is disconnected.\u003c\/p\u003e\n\u003ch2\u003e\u003cstrong\u003eCross-Reference \u0026amp; Compatibility:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp\u003eThe 100335-51 is a direct OEM replacement for the following part numbers:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLennox\/Allied Numbers:\u003c\/strong\u003e 72W39, 100335-51, 10033551\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGlobal\/JARD Cross-Ref:\u003c\/strong\u003e 12793, 14293\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMars\/Titan:\u003c\/strong\u003e 14293, 22293\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003e\u003cstrong\u003eExtensive Model Compatibility List:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eXC Series:\u003c\/strong\u003e XC20-036, XC21-036, XC25-036\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eXP Series:\u003c\/strong\u003e XP20-036, XP21-036, XP25-036\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLennox Elite:\u003c\/strong\u003e EL16XC1, EL18XCV\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLennox Signature:\u003c\/strong\u003e SL18XC1, SL28XCV\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAllied\/Armstrong:\u003c\/strong\u003e 4SCU, 4SHP Series Units\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":52252873097579,"sku":"66255142677","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0922\/9683\/9531\/files\/72W39.jpg?v=1774026300","url":"https:\/\/tophvacparts.com\/products\/lennox-100335-51-72w39-genuine-oem-dual-run-capacitor-75-10-mfd-440-vac-round","provider":"HVAC Parts and Equipment Depot","version":"1.0","type":"link"}