All the numbers match on my existing one (440 vac, 50/60 hz, +-6%), except for mine has the number 40uf/5uf instead of 45/5 ... will this one work?

A 55 Micro Farad cap will most likely run fine in your unit.. Capacitors work like batteries on start-up of the motor where extra electrical energy assists the unit in overcoming the latency of the motor to start. Capacitors charge at different times depending on capacity. Typically it uses 5 time constants for a capacitor to charge and discharge. All this means that a small cap will charge faster than a large one but means little to the user if they are not using it as some part of a timing circuit. The Booster Supco Cap adds extra energy on startup so the unit gets that extra electrical push. This is a very simplified answer to a somewhat lengthy Study of CAPs in EE courses and how they are used and work.

Where do I buy the wires to hook it up? I can't splice on the terminals myself

The wires are already on the condenser unit... If you have a separate capacitor for fan don't use that terminal or vice versa

would this fit C3455R?Thanks

No. PowerWell 45+5 is 2 3/8” Genteq C3455R is 2”

Dose it fit trane xl16i 4ttx6048?

If your your system issue is the compressor does not start once called and the fan does the you have a capacitor problem. Validate the capacitance in your system; 45uf for the compressor and 5uf for the fan then this product will work. The strap and connector is standard.

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45+5 MFD 45/5 uf 370 or 440 Volt Dual Run Round Capacitor PW-45/5/R for Condenser Straight Cool or Heat Pump Air Conditioner - Guaranteed to Last 5 Years

45+5 MFD 45/5 uf 370 or 440 Volt Dual Run Round Capacitor PW-45/5/R for Condenser Straight Cool or Heat Pump Air Conditioner - Guaranteed to Last 5 Years

Product ID: 42420079

Details

Brand
PowerWell
Capacitance
45 Microfarad
Material
Copper
Maximum Storage Temperature
75 Degrees
Shape
Round

⚡45+5 µF dual capacitance

🔋440V max operating voltage

🛡️5-year durability guarantee

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Description

⚡ Power your A/C like a pro — never settle for less!

BUILT TO LAST - Engineered to USA EIA-456-A & IEC 60252-1 standards for 5 years reliability
EFFORTLESS SWAP - Direct replacement for multiple OEM part numbers with snap-in mount
DUAL POWER BOOST - Supports both compressor & fan motors seamlessly
PRECISION FIT FORM - Compact 2.38" x 4" round design fits standard mounts
UNIVERSAL VOLTAGE UPGRADE - Replaces 370V & 440V caps with superior 440V rating

The PowerWell PW-45/5/R is a high-performance dual run capacitor with 45+5 µF capacitance and a robust 440V rating, designed to replace both 370V and 440V units. Built to stringent USA and international standards, it ensures reliable operation for air conditioners and heat pumps by supporting both compressor and fan motors. Its compact round form factor fits standard mounts, backed by a 5-year durability guarantee, making it the trusted choice for professional-grade HVAC maintenance.

Specifications

ASIN	B01NAZJYWA
Best Sellers Rank	#1,302 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #9 in Industrial Electrical Capacitors
Brand Name	PowerWell
Capacitance	45 Microfarad
Capacitance Tolerance	5
Customer Reviews	4.7 4.7 out of 5 stars (4,453)
EU Spare Part Availability Duration	5 Years
Item Dimensions W x H	2.38"W x 4"H
Item Shape	Round
Manufacturer	PowerWell
Material Type	Copper
Maximum Storage Temperature	75 Degrees Celsius
Maximum Voltage	440 Volts
Model	PW-45/5/R
Mounting Type	Snap-In Mount
Operating Voltage	440 Volts
Part Number	PW-45/5/R
UPC	714833366249
Upper Temperature Rating	70 Degrees Celsius

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