{"product_id":"3-mfd-370-440v-round-run-capacitor-universal-ac-motor-replacement","title":"3 MFD 370\/440V Round Run Capacitor — Universal AC Motor Replacement","description":"\u003cdiv class=\"product-content\"\u003e\u003cdiv class=\"product-description\"\u003e\n\u003cp\u003e\u003cstrong\u003e3 MFD single run capacitor\u003c\/strong\u003e rated 370\/440V for residential and light commercial HVAC systems. This is the motor run capacitor — it stays in the circuit continuously while the motor operates, providing the phase shift needed for single-phase motor rotation.\u003c\/p\u003e\n\u003cp\u003eDirect replacement for any system requiring a 3 MFD run capacitor. The 440V rating works in both 370V and 440V applications — the voltage rating is the maximum, not the operating voltage.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCapacitance: 3 MFD (±6%)\u003c\/li\u003e\n\u003cli\u003eVoltage: 370\/440 VAC 50\/60Hz\u003c\/li\u003e\n\u003cli\u003eShape: Round aluminum canister\u003c\/li\u003e\n\u003cli\u003eTerminals: 2-prong push-on (top mount)\u003c\/li\u003e\n\u003cli\u003eOperating temp: -40°F to +185°F\u003c\/li\u003e\n\u003cli\u003eUL recognized component\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cp\u003eSmall condenser fan motors, inducer motors, circulator pumps\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eMy existing capacitor is rated 370V — can I use this 440V?\u003c\/h4\u003e\n\u003cp\u003eYes. A 440V capacitor safely replaces a 370V capacitor of the same MFD. The voltage rating is the maximum, not operating voltage. Using a higher-rated capacitor is perfectly safe and often recommended for longer life.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eHow do I test if my capacitor is bad?\u003c\/h4\u003e\n\u003cp\u003eUse a multimeter with capacitance mode. Disconnect power, discharge the cap, then measure. A good 3 MFD capacitor should read between 2.8 and 3.2 MFD (within 6%). If it reads significantly low, it's weak and causing motor problems. If the top is bulging or leaking oil, replace immediately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003ch4\u003eCan I use a slightly different MFD value?\u003c\/h4\u003e\n\u003cp\u003eStay within 6% of the original value. A 3 MFD cap should not be replaced with anything below 3 or above 3 MFD. Using the wrong value causes motor overheating, reduced efficiency, and potential compressor damage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cp\u003e\u003cstrong\u003eFitment Guaranteed\u003c\/strong\u003e — if this capacitor doesn't work in your system, we'll send the right one or refund you.\u003c\/p\u003e\n\u003cp\u003eShips same-day from Houston, TX on orders before 3PM CST.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/div\u003e","brand":"National HVAC Parts","offers":[{"title":"Default Title","offer_id":63008715145587,"sku":"NHVAC-CAP-E9U080","price":8.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/611AmVztcdL._AC_SL1500_e17cc6ad-c291-4459-9c28-a24d56552ff1.jpg?v=1782076528","url":"https:\/\/nationalhvacparts.com\/products\/3-mfd-370-440v-round-run-capacitor-universal-ac-motor-replacement","provider":"National HVAC Parts","version":"1.0","type":"link"}