“Battery capacitors” is a misleading description for this category because the listed components are not batteries. They are round dual-run capacitors intended for 370V and 440V HVAC systems, including fan motors, heat pumps, and condensers. Your replacement must match the original capacitance, voltage, physical dimensions, and terminal arrangement. Incorrect sizing can prevent an air conditioner or heat pump from starting properly.
All seven FOCSPROD options use a CBB65-style enclosure and list a ±6% capacitance tolerance, but their microfarad ratings and case dimensions differ. That makes the guide below more useful than a generic ranking: you can narrow the list by matching the failed capacitor’s printed values and checking the space available inside the equipment cabinet.
An Overview Of The Picks
FOCSPROD 45+5 µF 440V CBB65B AC Capacitor
FOCSPROD 35+5 µF 440V CBB65 AC Capacitor
FOCSPROD 30+10 µF 440V CBB65B AC Capacitor
FOCSPROD 45+10 µF 440V CBB65B AC Capacitor
FOCSPROD 40+5 µF 440V CBB65 AC Capacitor
FOCSPROD 40+3 µF 440V CBB65B AC Capacitor
FOCSPROD 45+5 µF 440V CBB65B AC Capacitor
Inside Each Recommended Option
This option suits you when the removed capacitor reads 45+5 µF and fits a 60 mm by 100 mm space. A dual-run capacitor supports the continuous operation of an HVAC motor circuit, making exact capacitance matching more important than choosing a nearby value. The listed tolerance and broad operating range make it a sensible residential replacement, provided the voltage, terminals, and enclosure match.
Compared with the narrower FOCSPROD 45+5 µF housing later in this list, this model trades diameter for a shorter body. That may be the decisive trade-off in a condenser cabinet with limited vertical clearance.
Points In Its Favor
- The 45+5 µF rating supports systems with the matching factory specification.
- A 60 mm diameter may clear mounting areas that reject larger housings.
- The 100 mm height is easier to accommodate than the 125 mm alternatives.
- The 370/440 VAC range covers both common equipment classes.
- A stated 10,000 AFC fault-current rating supports high-fault installation environments.
Things To Consider
- You still need to confirm terminal spacing and wire orientation before installation.
- Capacitors can retain a hazardous stored charge, so discharge and isolation practices remain essential.
Quick Facts
Made For
You benefit most with a residential fan motor, heat pump, or condenser that specifies 45+5 µF and has adequate case clearance.
A Better Fit Elsewhere
Choose FOCSPROD 45+5 µF 440V CBB65B AC Capacitor when your cabinet offers more vertical space but only about 50 mm of diameter.
A technician maintaining older central air or heat-pump equipment may encounter the 35+5 µF combination more often than the 45 and 40 µF groupings. Your selection only makes sense after the old component’s two values and wiring diagram have been checked. The 62 mm diameter is slightly wider than the 60 mm housings here, while the 88 mm body keeps installation height below 90 mm.
That footprint may matter in a crowded service cabinet. Compared with FOCSPROD 40+5 µF 440V CBB65 AC Capacitor, this option carries less capacitance but gains a broader base diameter, so neither is a substitute despite their visual similarity.
Noteworthy Benefits
- The 35+5 µF configuration gives you an exact option for compatible motor circuits.
- A relatively short 88 mm body can simplify fitting beneath electrical components.
- The round CBB65 format supports conventional round-capacitor mounting arrangements.
Minor Gripes
- The 62 mm diameter is the widest case in this roundup, which may create clearance problems.
- You cannot substitute a nearby total capacitance value without checking the motor design.
- Handling during installation calls for care because lead-free capacitors may crack from impact.
Built With In Mind
This model fits you best when servicing a 370V or 440V HVAC motor marked for 35+5 µF and your cabinet has at least 62 mm of lateral clearance.
Consider Something Else
FOCSPROD 40+3 µF 440V CBB65B AC Capacitor is the better choice for a motor circuit that explicitly requires 40+3 µF.
The 30+10 µF pairing distinguishes this capacitor from every 40 and 45 µF model here. You gain that extra 10 µF section for equipment engineered around that specific split, but it does not make the component a universal substitute. Its 60 mm diameter and 100 mm height match the first option, giving you the same basic installation envelope.
For outdoor condenser work, dimensional parity may be just as important as the electrical rating. Compare this case carefully with the original component before ordering, especially where wiring labels control which terminals connect to the motor and compressor.
What Stands Out
- The 30+10 µF combination provides a distinct match for circuits that use this rating.
- A 60 mm diameter supports a broad range of round mounting positions.
- The listed ±6% tolerance gives you a defined capacitance band rather than an unspecified range.
- The compact 100 mm height helps with crowded condenser compartments.
Practical Considerations
- The 30+10 marking must appear on the equipment documentation or failed capacitor.
- You need to preserve the original terminal orientation during reconnection.
- The case offers no lead-length information, so wiring clearance depends on your installation.
Feature Snapshot
Right Fit For
You should choose this model for a 30+10 µF HVAC motor circuit with matching 60 mm mounting space.
Another Choice May Suit
FOCSPROD 40+5 µF 440V CBB65 AC Capacitor fits systems whose wiring diagram calls for 40+5 µF instead.
This option’s 45+10 µF rating offers the largest named capacitance pairing in the group, but that only helps equipment designed for it. You may find it useful in larger condenser cabinets where vertical room is plentiful and the original component measures about 50 mm in diameter by 125 mm tall.
The narrow body sets it apart from the 60 mm models. Compare that shape with the last option in this roundup: both carry 45+5 µF, but this one has a different capacitance section and a slightly shorter case.
The Practical Payoff
- The 10 µF auxiliary section matches compatible motor circuits requiring 45+10 µF.
- A 50 mm diameter may fit bracket layouts that exclude broader housings.
- The taller case remains easier to mount than some bulkier cylindrical designs.
- A 10,000 AFC rating supports use in appropriately protected equipment circuits.
Details To Watch
- The 125 mm height can be difficult to install in shallow service compartments.
- You must verify both capacitance sections rather than focusing only on the 45 µF value.
- Rounded enclosures need stable support so the body does not place stress on the terminals.
Technical Highlights
Built With In Mind
This choice suits you when a larger HVAC motor specifies 45+10 µF and the cabinet offers more height than diameter.
Swap It Out
FOCSPROD 45+5 µF 440V CBB65B AC Capacitor suits a 45+5 µF circuit when you can accommodate its larger 60 mm diameter.
The 40+5 µF rating and 50 mm diameter make this a practical match for equipment with a standard round capacitor location and moderate clearance needs. You should verify the 125 mm body height against the space beneath the fan motor or nearby wiring. Among this roundup’s options, that shape resembles the 45+10 µF model while carrying a different electrical specification.
For routine service work, keeping the original capacitance pairing matters more than selecting the nearest number. The listed fault-current rating is useful system information, but the equipment’s protective device and wiring still determine circuit suitability.
Real Benefits
- The 50 mm case fits narrow bracket and condenser arrangements more readily than 60 or 62 mm options.
- The 40+5 µF rating gives you an exact option for compatible single- and dual-speed motor circuits.
- A broad temperature specification supports use across typical indoor and outdoor service locations.
- The round casing simplifies visual comparison with the original component.
Some Limits To Know
- The taller housing may not clear tightly packed wiring in some cabinets.
- You cannot confirm mechanical compatibility from capacitance alone; inspect the mounting method and terminals.
- The product listing provides no lead measurements, which may complicate unusual terminal arrangements.
Best Suited To
This capacitor fits you best when replacing a 40+5 µF component in a service space with approximately 50 mm of diameter and 125 mm of height.
Where A Sibling Pick Shines
FOCSPROD 40+3 µF 440V CBB65B AC Capacitor is preferable for a motor circuit explicitly marked 40+3 µF.
Your equipment’s printed 40+3 µF marking is the reason to consider this model; the 3 µF section is not interchangeable with the 5 µF section used by several nearby options. Its 60 mm diameter and 100 mm height place it in the middle of the dimensional range here. That combination can be useful where width is available but vertical space is limited.
It is electrically distinct from FOCSPROD 40+5 µF 440V CBB65 AC Capacitor even though both begin with 40 µF. Replacing one with the other changes the auxiliary capacitance, so document the original part before disconnecting anything.
A Few Highlights
- The 40+3 µF combination serves circuits designed around that exact split.
- A 100 mm height reduces the depth required inside a condenser cabinet.
- The 370/440 VAC marking gives you a common HVAC voltage range.
Worth Bearing In Mind
- The 60 mm body will not fit every narrow bracket used with 50 mm capacitors.
- The 3 µF section makes close visual comparisons with 40+5 µF units misleading.
- Long-term reliability still depends on correct wiring, secure mounting, and appropriate circuit protection.
Core Details
Who Will Love This
You benefit most with a 40+3 µF motor circuit mounted in a space that accepts a 60 mm round case.
Reach For A Different Pick
FOCSPROD 45+10 µF 440V CBB65B AC Capacitor better serves equipment requiring 45+10 µF in a taller, narrower space.
A narrow 50 mm diameter can solve a stubborn cabinet-clearance problem, although the 135 mm height demands ample vertical space. You should choose it only for a circuit marked 45+5 µF, not simply because the first value matches another option. The listed 50/60 Hz operation and broad voltage range align it with conventional residential HVAC service.
This is the tallest enclosure in the group and ties the 45+10 µF model for the narrowest diameter. Compare those dimensions against the first option: you trade 10 mm of width for an extra 35 mm of height.
The Upside
- The 50 mm diameter may clear a mounting area that blocks 60 and 62 mm bodies.
- The 45+5 µF rating serves a common HVAC capacitance pairing.
- A 10,000 AFC rating provides useful information for matching the protected circuit.
- The narrow body can leave more lateral room for wires and adjacent components.
Possible Compromises
- The 135 mm height is the tallest listed here and may complicate shallow installations.
- You must confirm that the terminal layout matches the replacement wiring.
- A narrow case can be harder to stabilize on an improvised support, so use proper mounting hardware.
Important Details
Made For
This model suits you when a 45+5 µF circuit has a narrow lateral opening but sufficient vertical clearance.
Look Elsewhere
FOCSPROD 45+5 µF 440V CBB65B AC Capacitor is the better fit when 100 mm of height is easier to accommodate than 135 mm.
Matching A Replacement Capacitor Without Guesswork
Start with both capacitance values
A dual-run capacitor uses separate capacitance sections for motor circuits. You need both printed numbers, such as 40+5 µF or 45+10 µF, rather than adding them and selecting an unrelated model. A matching total capacitance does not guarantee the same start and run balance.
Compare voltage and frequency
These options list 370/440 VAC operation at 50/60 Hz. That covers common North American residential HVAC supplies, but your equipment nameplate remains the controlling reference. Never connect a component above its specified circuit voltage or outside its stated frequency range.
Measure the complete enclosure
Check diameter, height, mounting position, and terminal spacing before ordering. The round cases in this roundup range from 50 to 62 mm in diameter and from 88 to 135 mm in height. Those differences can matter more than you expect inside a crowded condenser cabinet.
Preserve the wiring arrangement
Photograph the existing connections before removal and compare the replacement’s terminal labels with the wiring diagram. Keep the enclosure upright and supported during installation. A capacitor can retain a dangerous charge, so proper isolation and discharge procedures are necessary before touching connected equipment.
Why Component Matching Matters Most
Mistakes Worth Dodging
Choosing by total µF, diameter, or voltage alone can leave you with an incompatible replacement. You should match the two capacitance values first, then compare voltage, frequency, case size, and terminals. Avoid using a visually similar model without checking the equipment’s service information.
What Separates Premium From Basic
In this selection, a higher capacitance value does not automatically mean a higher-grade component; it may simply serve a different motor circuit. The more expensive-looking upgrade is useful only when its electrical values and enclosure match your system. Paying more for a mismatched format adds little practical value.
