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The most common reason a central air conditioner suddenly stops blowing cold air is a failed run capacitor — a small, cylindrical part inside the outdoor condenser unit. The fix is often a simple DIY swap of a 35/5 µF (microfarad) capacitor, but choosing the wrong one means either a non-working AC or a dangerous installation. This guide cuts through the technical noise to show you exactly which AC Capacitor 35/5 to buy, what the numbers on the label actually mean, and how to make the swap safely.
I’m Min — the founder and writer behind Gadgets Feed. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
Whether you are a homeowner facing a hot weekend or a landlord keeping tenants comfortable, these picks cover every budget. best ac capacitor 35/5 choices ranked by owner satisfaction and field-proven reliability.
Our Picks at a Glance
How To Choose The Best AC Capacitor 35/5
Before you spend money, you need to know what you are looking at. The “35/5” marking on a dual run capacitor refers to its capacitance, which is a measure of its energy storage. The larger number (35 MFD) provides the starting jolt and steady power for your compressor, while the smaller number (5 MFD) handles the condenser fan motor. If you pick a capacitor with the wrong MFD values, your motor will run weak, overheat, or refuse to start at all.
The Voltage Match Is Not a Suggestion
Every capacitor is rated for a maximum voltage — the most common being 370V or 440V. This spec is a safety ceiling, not a target. You can safely use a 440V capacitor where a 370V one was originally installed, because the higher rating simply gives you more headroom. However, you should never install a 370V capacitor in a system that calls for 440V, since it could fail under the electrical stress. If you are unsure, buying the 440V version is the safer bet.
Terminals and Safety: C, FAN, and HERM
On the top of the capacitor, you will see three labeled terminals: “C” for common, “FAN” for the fan motor, and “HERM” for the compressor (hermetic). Before you touch anything, you must disconnect the power at the breaker and then discharge the old capacitor by shorting the terminals with an insulated screwdriver. This part is not optional — a charged capacitor can deliver a painful, and even lethal, shock. Wire the new one exactly the same way, and give the system 5 minutes to reset after powering back on.
Quick Comparison
| Model | Best For | Voltage (VAC) | Shape | Height | Amazon |
|---|---|---|---|---|---|
| Genteq 97F9848★ Best Overall | North American Made | 440V | Round | 6 inches | Amazon |
| Frienda 35/5 µFBudget Champion | Budget Value | 370/440V | Round | 4.5 inches | Amazon |
| TEMCo RC01025-Year Warranty | Warranty Coverage | 370/440V | Round | 5.1 inches | Amazon |
| BOJACK 97F9834 | Compact Fit | 370V | Round | 3.94 inches | Amazon |
| VEXUNGA CBB65B | Universal Fit List | 370/440V | Round | 3.35 inches | Amazon |
| HUAREW CBB65B | Quality Build | 370/440V | Round | 4.13 inches | Amazon |
| GE Z97F9848 | Drop-in GE Fit | 440V | Round | — | Amazon |
| OEM 97F9899 | Trane OEM Match | 440V | Round | 2.87 inches | Amazon |
| AmRad Goodman Cap | US Made Premium | 370/440V | Round | 4.25 inches | Amazon |
In‑Depth Reviews
1. Genteq Capacitor Round 35/5 MFD 440 Volt 97F9848
Our pick — over 4.5★ from 800+ verified ratings; the strongest balance of quality and price.
The North American-made round the pros quietly reach for.
You can swap this Genteq (formerly GE) capacitor straight into your AC without rewiring or adding adapters — it is a 35 + 5 uf/MFD 440 Volt unit that matches the original part exactly. Buyers report pulling the old part out of their Trane unit, searching the part number, and finding this exact match; as one put it, “At the advice of a friend with an HVAC background, I bought this capacitor hoping it would fix the issue with my C/A not working.” The fit is just like the original, and installation needs no special tools.
Its 6-inch height makes it the tallest pick here, so measure your bracket before ordering, but that size houses a durable build that a few owners have seen run past the 5-year mark. Functionality is the trait that wins people over, with well over 80 owners singling out how the AC starts right up after the swap, and installation and value-for-money follow close behind. It saved one buyer the cost of a tech visit plus a repair bill, which is the recurring story in the review pages.
Like most capacitors, this one is a wear part that lives in a hot, vibrating box, so durability opinions are mixed — most units last years, but it is not a lifetime component. If you want a premium, North American-made capacitor that matches the factory GE spec exactly, this is the one.
Field-Tested Strengths
- True drop-in swap — no adapters or re-wiring needed
- 440V rating gives extra safety headroom
- Over 80 owners call out how smoothly it restores cooling
Know Before You Buy
- Tallest pick at 6 inches — check your cabinet space
- Not a lifetime part; typical wear component
The Pro’s Pick: Buyers who want a factory-grade GE replacement without hunting for adapters.
Watch The Height: The 6-inch body needs a bracket with room to spare.
2. Frienda 35/5 µF Dual Run AC Capacitor 370/440V
A budget part that tests accurate and gets you cold again in minutes.
When your AC stops blowing cold air, the first suspect is often the run capacitor. Owners mention that this Frienda unit fixed their outdoor unit for in about 10 minutes, since the size and terminals matched the old part exactly. One retired HVAC tech ordered it for his son, got next-day delivery, and solved the fan motor issue the same evening — the #1 failure point on AC units.
It is UL certified to the toughest USA standards including EIA-456-A and IEC 60252-1: 2001, and it runs in temperatures from -40°F to 158°F. An owner who tested it with a meter found the microfarad reading accurate, which is the reassurance you want from a budget capacitor. The 440V ceiling here comfortably beats the 370V rating on the BOJACK pick by a 19% gap, giving this cheaper unit more electrical headroom.
The honest trade-off is that durability reviews skew negative — a few customers note shorter lifespans than the premium North American-made units. If you want a cheap, well-built spare to keep on hand, this is a smart buy; if you want a 5+ year single install, the Genteq above is worth the extra money.
Owner-Verified Value: Buyers confirm the MFD is accurate on a meter, and the 440V rating exceeds the 370V on costlier-looking rivals.
The Savings Play: A fix that keeps a service call out of your summer budget.
Reach for This If: You want a UL-certified spare at entry-level pricing.
Look Elsewhere If: You’d rather not gamble on lifespan and want North American manufacturing.
3. TEMCo 35+5 uF Dual Run Capacitor CBB65
A heavy-duty aluminum body backed by a rare 5-year warranty.
This TEMCo capacitor brings a 5-year warranty to a part that most manufacturers treat as disposable, and it is built to handle the heat: it operates from -40°C to +85°C (-40°F to +185°F). The heavy-duty aluminum casing with a steel cap and 1/4″ quick-disconnect terminals makes it distinctly sturdier than budget plastic-bodied rivals.
Owners who measure capacitance confirm this one runs true from the start — one measured 35.5uF on the compressor and 5.05uF on the fan, while their old cap had degraded to just 18uF. The recurring story in the reviews is a holiday storm killing the cap, a sub- replacement in under 20 minutes, and a repair bill avoided. As reviewers point out: “Saved myself and got my AC running a week earlier than others in my area.”
Take the warnings in the review pages seriously: this part stores a lethal charge, and the 370V/1A figure appears in owner cautions about proper discharging before removal. It suits anyone who wants warranty-backed confidence and does not mind following basic electrical safety.
Why It Stands Out
- 5-year warranty on a wear item is rare
- Tested accurate from the start by multiple owners
- Rated to +185°F operating temp
Fair Warning
- Stores a lethal charge — must discharge before handling
- Heavier aluminum build vs lighter plastic caps
The Warranty Play: The only pick here backed for 5 years, ideal for keeping a spare on the shelf.
Respect The Charge: Watch a video and short the terminals first — owners flag this clearly.
4. BOJACK 97F9834 35+5uF 35/5MFD ±6% 370V CBB65
A compact 370V drop-in that fits tight condenser cabinets.
If your condenser bracket has limited clearance, this BOJACK capacitor is about 12% shorter than the Genteq above — it measures 1.97″W x 3.94″H and is a direct replacement for the 97F9834 and Z97F9834 part numbers. One owner confirmed it is a direct fit for a 97F9834BZ3 “in fit, form and shape.”
This BOJACK is rated for AC 370V, the minimum most residential systems need, and it is engineered for safety with a 10,000 AFC anti-explosion pressure switch (a device that vents internal pressure to prevent the case from bursting). Reviewers consistently praise how the condenser fan resumed working immediately after install, and the value-for-money angle is strong — one buyer hired a tech but kept the capacitor cost low by having the part on hand.
The voltage sag is the honest gap: at 370V, this sits 19% below the 440V ceiling on the Frienda, so if your system calls for 440V, look at the higher-rated picks. For a straight 370V system, this is a reliable, cheap, and genuinely compact match.
Measured Fit: Owners verify it drops into a 97F9834BZ3 slot with zero modification.
Voltage Note: A 370V ceiling is fine for standard systems but cannot replace a 440V spec.
Pick This If: You need the smallest 370V body to fit a tight bracket.
Pass If: Your condenser nameplate demands 440V — the gap matters.
5. VEXUNGA 35/5 uF 35+5 MFD 370V or 440V Dual Run CBB65B
One part number that replaces nearly two dozen OEM caps.
This VEXUNGA capacitor lists compatibility with 20+ OEM part numbers including 97F9834, Z97F9848, and RC0102, making it the most likely single part to match whatever is currently mounted in your condenser. It is rated for both 370V and 440V systems, so one purchase covers either spec, and the three labeled terminals (“Herm,” “Fan,” “C”) remove the guesswork from the swap.
At just 3.35 inches tall, this is also among the shortest picks, though a few shoppers say it is smaller than the original part they removed — the reviews are mixed on size, with one owner noting “it is smaller” even though it “worked and fixed my AC.” The reliability praise is strong, with owners reporting a 10-minute install on a 3-year-old Goodman and a professional repair bill avoided.
There is a practical tip buried in the review pages: after restoring power, allow at least five minutes for the HVAC system to reset before expecting cold air. Given the wide compatibility list and dual voltage rating, this is a fantastic choice if you are not certain of your exact OEM part number.
Coverage Wins
- Replaces 20+ OEM numbers including RC0102
- Works on both 370V and 440V systems
- Short 3.35″ body fits tight spaces
Size Note
- Shorter than some original parts — check your bracket reach
- MDF tolerance is ±6%
Grab This If: You don’t know your exact part number and want the widest compatibility net.
Or If: You want one 440V-capable spare that covers both voltage specs.
6. HUAREW 35/5 uF CBB65B AC Capacitor 370V/440V
A UL-style safety rating and clean labeled terminals for easy swaps.
The HUAREW capacitor targets the weekend DIYer who wants a clear, safe install. It carries an S1 safety protection level (a rating for internal pressure relief), operates between -40°C and 70°C, and its three top terminals are labeled both “Herm”/”H” for the compressor and “Fan”/”F” for the fan, so there is no ambiguity when you transfer the wires. Owners describe it as good quality, with the AC fan starting right away after the swap.
The review pages tell a recurring story of holiday breakdowns and avoided service bills — one owner’s AC died on Labor Day in a heatwave with no tech available, and a few YouTube videos plus this part got it running. Another mentions a sister quoted for a part that costs a fraction of that here. The performance praise is consistent, with owners calling out how quickly cooling returns.
This is a more compact unit at 4.13 inches tall, but it lists the same broad compatibility as the VEXUNGA (97F9834, RC0102, TRCFD355, and more). If you want a mid-priced 440V-rated capacitor with clear labeling and a solid safety rating, this one delivers without the premium price of the North American-made picks.
DIY-Friendly: Dual-labeled terminals make wire transfer simple to use for first-timers.
Holiday Hero: Owners repeatedly report same-day fixes when no tech was available.
Choose This For: A clear-labeled, S1-safety 440V part at a mid-range price.
Choose The Genteq For: North American manufacturing if that matters more than price.
7. GE Z97F9848 35 + 5 uf MFD 440 Volt Round Dual Run
A ClimaTek-branded GE capacitor with a 30-minute install story.
This Z97F9848 replacement comes from ClimaTek but carries the GE/Genteq lineage, and it is rated for 440V with a polypropylene build rated up to 85°C. Buyers report installing it in as little as 5 to 30 minutes, with the most common story being a failed Carrier capacitor that had the fan refusing to start on its own.
The reliability praise is strong — the most-mentioned positive trait — with owners noting the capacitor is easy to install and saves money versus a service call. One buyer’s old unit had a bulging top with oil leaking, an obvious failure sign, and the swap restored cold air. A twenty-minute install reportedly saved hundreds of dollars, though one owner did receive a unit with a small dent in the can that still worked fine.
The honest caveat is that lifespan and cooling performance reviews are genuinely mixed — some report years of service while others saw a short life, and a few units did not cool properly after install. If you want the GE name and North American build with the shortest install time, this is a solid choice, but be ready to check your specific unit’s compatibility.
Owner Wins
- 5-30 minute installs reported regularly
- 440V rating with 85°C upper temp
- GE/Genteq North American lineage
Mixed Signals
- Lifespan reports split between years and short life
- A few units reported poor cooling after install
Best For: Buyers who want the GE brand and a very quick mechanical swap.
But Note: The mixed lifespan feedback makes the Genteq 97F9848 the safer same-lineage bet.
8. OEM Upgraded Replacement Round Capacitor 35 + 5 uf MFD 440 Volt Fits GE
The exact OEM piece that Trane owners say matches their original.
This 97F9899 replacement is built with a copper material core and rated for 440V, and owners mention it is “exactly the same capacitor as the original Trane component.” That direct-fit story repeats across the reviews — a failed capacitor after a week of high temperatures, a fan and compressor refusing to start, and this part restoring operation right away.
At 2.5″W x 2.87″H, this is a notably short and squat capacitor at under 3 inches tall, which makes it a great fit for condensers with minimal vertical clearance. The installation feedback is consistently positive, with one owner admitting they thought they needed a whole new AC unit before this -class part saved their budget. The review pages estimate savings around versus professional installation.
This is a copper-wound part at a mid-range price, and the reliability and fit praise is strong across the board. If you want the closest match to a factory GE/Trane component with a compact profile, this is a confident pick.
Factory Match: Owners confirm it mirrors the original Trane component exactly.
Compact Build: Under 3 inches tall, ideal for tight condenser brackets.
Reach For It: When your AC’s original part is a GE/Trane and you want a like-for-like swap.
Watch Clearance: Short body means check your bracket spacing before mounting.
9. Goodman CAP050350440RSP Replacement 35 + 5 uf/Mfd 370/440 VAC AmRad
A U.S.-made AmRad with a compressor protector terminal built in.
This AmRad capacitor carries the Goodman part number CAP050350440RSP and includes a CPT (Compressor Protector Terminal), a feature that adds a layer of monitoring for the compressor motor. It is made in the U.S.A., which owners say translates to reliability that outlasts offshore capacitors — one reviewer noted it “outlasted offshore caps” and tested within specs on a capacitance meter.
Weighing just 8 ounces and standing 4.25 inches tall, this is one of the lighter and more manageable units here. Owners describe the fix as a critical DIY: the capacitor is essential for motor start-up, typically dying after 5-7 years, and the replacement cost is a fraction of a tech visit. The review pages recommend keeping one on hand as a proactive spare.
The one mixed note in the data is lifespan — a single report of failure after almost two years, which sits against multiple owners praising years of service. Given the US manufacturing, the CPT feature, and the strong reliability and quality marks, this is the premium pick for Goodman owners who want the best part their system can take.
Why It’s Premium
- Made in the U.S.A. with a 5-year warranty
- Includes Compressor Protector Terminal (CPT)
- Owners say it outlasts offshore capacitors
Heads Up
- At the top of the price range for this category
- One lifespan report fell short of the norm
The Premium Spend: Worth it for Goodman owners who prioritize U.S. manufacturing and the CPT safety feature.
The Trade-Off: You pay top dollar for the extra build quality.
Understanding the Specs
Capacitance (MFD)
The “35/5” on a dual run capacitor breaks down into two numbers. The 35 MFD powers the compressor, and the 5 MFD drives the condenser fan. These must match your old part — installing a 45/5 where a 35/5 belongs can overwork the motor and shorten its life. The ±6% tolerance you see on most listings (like the BOJACK and HUAREW) is the acceptable variance in the measured value, so a 35 MFD cap reading between 33 and 37 MFD is normal.
Voltage Rating (VAC)
The voltage rating is the maximum electrical pressure the capacitor can safely handle. A 440V-rated capacitor can replace a 370V one safely, giving you extra headroom. Going the other direction — installing a 370V where a 440V is spec’d — risks premature failure. Most premium picks here (Genteq, GE, AmRad) are rated 440V, while budget-friendly options like the Frienda offer both 370V and 440V compatibility in one part.
FAQ
Can I use a 440V capacitor to replace a 370V one?
How do I know if my capacitor is actually the 35/5 MFD type?
How long does a 35/5 run capacitor last?
Can I install a 35/5 capacitor myself?
What are the signs that my AC capacitor has failed?
What do the C, FAN, and HERM terminals mean on a dual run capacitor?
Is a round capacitor better than an oval one?
Will a 35/5 capacitor work on both a heat pump and an AC unit?
Final Thoughts: The Verdict
Across the board, the ac capacitor 35/5 winner is the Genteq 97F9848 because it is the proven North American-made drop-in that restores cooling instantly, backed by the strongest owner reputation in this roundup. If you want the widest compatibility net at a friendlier price, grab the VEXUNGA, which fits over 20 OEM part numbers. And for the budget-conscious DIYer keeping a spare on the shelf, the Frienda delivers a UL-certified 440V part for the least money — the crowd favorite among the entry-level options.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of August 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
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