{"product_id":"cbb61-3-5uf-250vac-2-wire-ceiling-fan-capacitor","title":"3.5uF 250V AC CBB61 Fan Motor Run Capacitor 2 Wires 50\/60Hz","description":"\u003cmeta charset=\"UTF-8\"\u003e\u003cmeta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"\u003e\n\u003ctitle\u003e\u003c\/title\u003e\n\u003cmeta name=\"description\" content=\"CBB61 3.5uF (3.5mfd) 250VAC ceiling fan motor capacitor, 2-wire, metallized polypropylene film. 50\/60Hz, ±5%, non-polarized. For ceiling fan, wall fan, exhaust fan, small AC motor. Brand new.\"\u003e\u003cmeta name=\"keywords\" content=\"CBB61 3.5uF 250VAC, 3.5mfd ceiling fan capacitor, 2 wire fan motor capacitor, CBB61 3.5 microfarad 250V AC, ceiling fan start capacitor replacement\"\u003e\u003cmeta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large\"\u003e\n\u003clink href=\"https:\/\/yourdomain.com\/products\/cbb61-3-5uf-250vac-2-wire-ceiling-fan-capacitor\" rel=\"canonical\"\u003e\u003cmeta property=\"og:type\" content=\"product\"\u003e\u003cmeta property=\"og:title\" content=\"CBB61 3.5uF 250VAC 2-Wire Ceiling Fan Motor Capacitor\"\u003e\u003cmeta property=\"og:description\" content=\"Metallized polypropylene film, non-polarized, 50\/60Hz. For ceiling fan and small AC motor repair.\"\u003e\u003cmeta property=\"og:url\" content=\"https:\/\/yourdomain.com\/products\/cbb61-3-5uf-250vac-2-wire-ceiling-fan-capacitor\"\u003e\u003c!-- ========== Product Schema ========== --\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\/\",\n  \"@type\": \"Product\",\n  \"name\": \"CBB61 3.5uF 250VAC 2-Wire Ceiling Fan Motor Capacitor\",\n  \"description\": \"CBB61 metallized polypropylene film AC motor run capacitor, 3.5uF (3.5mfd), 250VAC, 50\/60Hz, ±5% tolerance, 2-wire lead, non-polarized. For ceiling fan and small single-phase AC motor.\",\n  \"brand\": {\"@type\": \"Brand\", \"name\": \"YourBrand\"},\n  \"mpn\": \"CBB61-3R5-250-2W\",\n  \"category\": \"Electronics \u003e Capacitors \u003e Film Motor Run\",\n  \"additionalProperty\": [\n    {\"@type\": \"PropertyValue\", \"name\": \"Type\", \"value\": \"CBB61 metallized polypropylene film (MPP)\"},\n    {\"@type\": \"PropertyValue\", \"name\": \"Capacitance\", \"value\": \"3.5uF (3.5mfd), ±5%\"},\n    {\"@type\": \"PropertyValue\", \"name\": \"VoltageRating\", \"value\": \"250VAC\"},\n    {\"@type\": \"PropertyValue\", \"name\": \"Frequency\", \"value\": \"50\/60Hz\"},\n    {\"@type\": \"PropertyValue\", \"name\": \"Leads\", \"value\": \"2-wire (non-polarized)\"},\n    {\"@type\": \"PropertyValue\", \"name\": \"Case\", \"value\": \"Rectangular plastic, ~37×26×15mm typical\"},\n    {\"@type\": \"PropertyValue\", \"name\": \"Class\", \"value\": \"Motor run \/ motor start assist, AC\"},\n    {\"@type\": \"PropertyValue\", \"name\": \"SelfHealing\", \"value\": \"Yes (metallized film)\"}\n  ],\n  \"offers\": {\n    \"@type\": \"Offer\",\n    \"priceCurrency\": \"USD\",\n    \"price\": \"1.79\",\n    \"availability\": \"https:\/\/schema.org\/InStock\",\n    \"itemCondition\": \"https:\/\/schema.org\/NewCondition\",\n    \"url\": \"https:\/\/yourdomain.com\/products\/cbb61-3-5uf-250vac-2-wire-ceiling-fan-capacitor\"\n  }\n}\n\u003c\/script\u003e\u003c!-- ========== FAQ Schema ========== --\u003e\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is the CBB61 3.5uF capacitor polarized? Which wire goes where?\",\n      \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. CBB61 is a metallized polypropylene AC film capacitor — non-polarized. The two leads are interchangeable: one goes to the motor auxiliary (start) winding lead, the other to the line\/neutral side of that winding per the fan's wiring diagram. There is no plus\/minus. Always turn off power at the breaker and discharge before touching leads.\"}\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"My ceiling fan hums or won't spin until I push the blade — is this the capacitor?\",\n      \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Very likely. A weak or open CBB61 capacitor removes the phase shift the single-phase motor needs to generate starting torque. Symptoms: motor hums, blade needs a hand-push to start, runs slow, or loses speed settings. Replace with the same microfarad value (3.5uF) and equal-or-higher VAC rating.\"}\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I use 370VAC or 450VAC instead of 250VAC?\",\n      \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes — voltage must be equal or higher, never lower. A 3.5uF 370VAC or 450VAC CBB61\/CBB60 film capacitor is a safe upgrade over a tired 250VAC part, as long as the µF value stays 3.5uF (±5%) and the case fits the switch housing. Do not substitute an electrolytic (DC) capacitor — it will fail on AC mains.\"}\n    }\n  ]\n}\n\u003c\/script\u003e\n\u003ch1\u003eCBB61 3.5uF 250VAC Ceiling Fan Motor Capacitor – 2 Wire (Brand New)\u003c\/h1\u003e\n\n\u003cp\u003e\u003cstrong\u003e100% brand new\u003c\/strong\u003e \u003cstrong\u003eCBB61 3.5µF (3.5mfd)\u003c\/strong\u003e AC motor capacitor, rated \u003cstrong\u003e250VAC 50\/60Hz\u003c\/strong\u003e, ±5% tolerance. Metallized polypropylene film (MPP) dielectric in a flame-retardant rectangular plastic case with epoxy seal. \u003cstrong\u003e2-wire, non-polarized\u003c\/strong\u003e — direct replacement for weak or swollen ceiling-fan capacitors causing slow start, humming, or stuck speeds.\u003c\/p\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" style=\"border-collapse:collapse; max-width:580px;\"\u003e\n\t\u003ctbody\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003cth\u003eType\u003c\/th\u003e\n\t\t\t\u003ctd\u003eCBB61 metallized polypropylene film (MPP) motor run capacitor\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003cth\u003eCapacitance\u003c\/th\u003e\n\t\t\t\u003ctd\u003e3.5µF \/ 3.5mfd, ±5%\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003cth\u003eVoltage\u003c\/th\u003e\n\t\t\t\u003ctd\u003e250VAC\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003cth\u003eFrequency\u003c\/th\u003e\n\t\t\t\u003ctd\u003e50Hz \/ 60Hz\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003cth\u003eLeads\u003c\/th\u003e\n\t\t\t\u003ctd\u003e2 wires (~120mm typical), non-polarized\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003cth\u003eCase\u003c\/th\u003e\n\t\t\t\u003ctd\u003eRectangular ABS\/plastic, ~37×26×15mm (1.5×1.0×0.6in) typical\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003cth\u003eDielectric\u003c\/th\u003e\n\t\t\t\u003ctd\u003eSelf-healing metallized polypropylene film\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003cth\u003eClimatic Category\u003c\/th\u003e\n\t\t\t\u003ctd\u003e40\/85\/21 (typical)\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003cth\u003eMounting\u003c\/th\u003e\n\t\t\t\u003ctd\u003eSnap \/ cable-tie in fan switch housing\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003cth\u003ePolarity\u003c\/th\u003e\n\t\t\t\u003ctd\u003eNone — AC film capacitor\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhat It Does\u003c\/h2\u003e\n\n\u003cp\u003eIn a single-phase ceiling-fan motor, the capacitor sits in series with the auxiliary winding and shifts current phase so the motor develops starting torque and holds steady speed. When the film degrades, µF drifts low, and the motor hums, lags, or won't self-start. Swapping in a fresh 3.5µF part restores rotation, speed response, and quiet running.[2,7,9](@ref)\u003c\/p\u003e\n\n\u003ch2\u003eCompatible Use Cases\u003c\/h2\u003e\n\n\u003cul\u003e\n\t\u003cli\u003eCeiling fans (single-speed or switch-controlled)\u003c\/li\u003e\n\t\u003cli\u003eWall fans, stand fans, table fans\u003c\/li\u003e\n\t\u003cli\u003eExhaust \/ vent fans, range hood blowers\u003c\/li\u003e\n\t\u003cli\u003eSmall single-phase AC motors, water pumps, generator exciter辅助\u003c\/li\u003e\n\t\u003cli\u003eReplacement for old 3.5µF 250VAC CBB61 \/ CBB60 film capacitors\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eReplacement Rules (don't guess)\u003c\/h2\u003e\n\n\u003cul\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eµF must match:\u003c\/strong\u003e 3.5µF, ±5% tolerance. Never \"upgrade\" to 4µF or 5µF blindly — wrong µF changes phase angle and can overheat the winding.\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eVAC equal or higher:\u003c\/strong\u003e 250VAC → 370VAC\/450VAC is fine. Never lower.\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eType:\u003c\/strong\u003e AC film (CBB61\/CBB60), NOT aluminum electrolytic, NOT DC-rated cap.\u003c\/li\u003e\n\t\u003cli\u003e\n\u003cstrong\u003eWires:\u003c\/strong\u003e 2-wire single-value. If your fan had 3\/4\/5 wires, this part is wrong — order the multi-tap version.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWiring (2-wire)\u003c\/h2\u003e\n\n\u003col\u003e\n\t\u003cli\u003eKill power at the breaker. Confirm no voltage at the fan canopy.\u003c\/li\u003e\n\t\u003cli\u003ePhoto the old cap before pulling connectors.\u003c\/li\u003e\n\t\u003cli\u003eCBB61 is non-polarized — either lead can go to either terminal. One lead lands on the motor auxiliary-winding wire (often brown\/blue), the other on the line\/neutral side per the fan diagram.[7,10](@ref)\u003c\/li\u003e\n\t\u003cli\u003ePush spade\/quick-connects fully home. No bare copper showing.\u003c\/li\u003e\n\t\u003cli\u003eRestore power, test all speed settings, listen for hum.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eFailure Symptoms Checklist\u003c\/h2\u003e\n\n\u003cul\u003e\n\t\u003cli\u003eFan hums but won't start until blade is pushed by hand\u003c\/li\u003e\n\t\u003cli\u003eRuns noticeably slower than before\u003c\/li\u003e\n\t\u003cli\u003eSpeed pull-chain does nothing or skips speeds\u003c\/li\u003e\n\t\u003cli\u003eCapacitor case swollen, discolored, or smells burnt\u003c\/li\u003e\n\t\u003cli\u003eMotor warm-to-hot during normal run\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCBB61 vs CBB60 vs CBB65 (quick)\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"6\" style=\"border-collapse:collapse; max-width:560px;\"\u003e\n\t\u003ctbody\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003cth\u003eType\u003c\/th\u003e\n\t\t\t\u003cth\u003eShape\u003c\/th\u003e\n\t\t\t\u003cth\u003eUse\u003c\/th\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003eCBB61\u003c\/td\u003e\n\t\t\t\u003ctd\u003eRectangular plastic\u003c\/td\u003e\n\t\t\t\u003ctd\u003eCeiling\/exhaust fans, small motors\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003eCBB60\u003c\/td\u003e\n\t\t\t\u003ctd\u003eCylindrical plastic\u003c\/td\u003e\n\t\t\t\u003ctd\u003ePumps, washers, small compressors\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\t\u003ctr\u003e\n\t\t\t\u003ctd\u003eCBB65\u003c\/td\u003e\n\t\t\t\u003ctd\u003eMetal can, oil-filled\u003c\/td\u003e\n\t\t\t\u003ctd\u003eHVAC compressors, continuous heavy duty\u003c\/td\u003e\n\t\t\u003c\/tr\u003e\n\t\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eFor a ceiling fan, CBB61 is the correct form factor. Don't over-spec a metal-can CBB65.[2](@ref)\u003c\/p\u003e\n\n\u003ch2\u003eCondition\u003c\/h2\u003e\n\n\u003cp\u003e100% brand new, lead-forming intact, case not bulged, capacitance within ±5% at outgoing test. RoHS-compliant, flame-retardant case.\u003c\/p\u003e\n","brand":"DIYMars","offers":[{"title":"Default Title","offer_id":53351827407159,"sku":"B61W2503.5U","price":2.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0894\/5562\/4503\/files\/57_edceeafe-7b80-4a7c-b152-c78016edaad8.jpg?v=1792122012","url":"https:\/\/www.diymars.com\/products\/cbb61-3-5uf-250vac-2-wire-ceiling-fan-capacitor","provider":"DIYMars","version":"1.0","type":"link"}