{"product_id":"mars-12790-run-capacitor","title":"MARS 12790 Run Capacitor","description":"\u003cp\u003eThe \u003cstrong\u003eMARS 12790 dual run capacitor\u003c\/strong\u003e is a heavy-duty \u003cstrong\u003e50\/5 MFD 440V round capacitor\u003c\/strong\u003e designed for high-performance HVACR motor and compressor applications. This dual-rated component provides the necessary capacitive phase shift for both the compressor and the condenser fan motor, ensuring efficient start-up and lower running amperage. Built to \u003cstrong\u003eEIA-456-A standards\u003c\/strong\u003e, it features a \u003cstrong\u003emetallized polypropylene film\u003c\/strong\u003e dielectric housed in a rugged aluminum casing. The \u003cstrong\u003e50+5 uF 440 volt rating\u003c\/strong\u003e makes it a universal replacement for 370V and 440V systems, offering increased dielectric strength and thermal stability. With a temperature rating of -40°C to +70°C, this \u003cstrong\u003eMARS 12790 50\/5 MFD 440VAC\u003c\/strong\u003e unit is engineered for continuous duty in demanding environments. The \u003cstrong\u003equad-blade quick-connect terminals\u003c\/strong\u003e allow for rapid field installation, while the 440-volt rating provides a superior safety margin against voltage spikes compared to lower-rated 370V capacitors.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Technical Benefits\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDual-Rated Performance:\u003c\/strong\u003e Consolidates a 50 MFD compressor lead and a 5 MFD fan lead into a single round-case footprint.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUniversal Voltage Compatibility:\u003c\/strong\u003e Rated at 440VAC to replace both 370-volt and 440-volt \u003cstrong\u003edual run capacitors\u003c\/strong\u003e effortlessly.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eInternal Safety Interrupter:\u003c\/strong\u003e Designed to disconnect the capacitor in the event of an internal pressure buildup.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEnvironmentally Safe:\u003c\/strong\u003e Non-PCB oil-filled construction ensures compliance and safe operation across commercial and residential sites.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCorrosion Resistance:\u003c\/strong\u003e High-grade aluminum housing protects the internal \u003cstrong\u003emetallized polypropylene film\u003c\/strong\u003e from moisture and oxidation.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eCommon Contractor Questions\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use a 440V capacitor to replace a 370V unit?\u003c\/strong\u003e\u003cbr\u003e\nYes, using a \u003cstrong\u003e440V round dual run capacitor\u003c\/strong\u003e to replace a 370V unit is a standard practice and often preferred because the higher voltage rating provides a better tolerance for line voltage fluctuations.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow do I identify the correct terminals for wiring?\u003c\/strong\u003e\u003cbr\u003e\nThe MARS 12790 uses standard industry markings: 'C' for Common, 'HERM' for the compressor (50 MFD), and 'FAN' for the condenser fan motor (5 MFD).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat causes a 50\/5 MFD capacitor to bulge or fail?\u003c\/strong\u003e\u003cbr\u003e\nFailure is typically caused by high ambient temperatures, excessive voltage spikes, or motor winding degradation. Replacing a bulging unit immediately is critical to prevent compressor motor burnout.\u003c\/p\u003e\n\n\u003cp\u003eDisclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.\u003c\/p\u003e","brand":"Mars","offers":[{"title":"Default Title","offer_id":35643881868,"sku":"12790","price":13.56,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1838\/2375\/files\/Image_559fac7b-0380-402c-8095-4fab21d561f7.png?v=1790532866","url":"https:\/\/www.gsistore.com\/products\/mars-12790-run-capacitor","provider":"GSIstore","version":"1.0","type":"link"}