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

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

€ 34.65

Duties & taxes included

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Description

⚡ Power your A/C like a pro — last longer, run stronger!

BUILT TO ENDURE - Operates reliably from -40°C to 70°C for all-season performance
DUAL POWER BOOST - Supports both compressor & fan motors seamlessly
SPACE SAVING DESIGN - Compact 2.38" diameter x 4" height round form factor
UNIVERSAL VOLTAGE FIT - Replaces 370V & 440V capacitors with superior 440V rating
PRECISION QUALITY CONTROL - Meets strict USA EIA-456-A & IEC 60252-1 standards

The PowerWell PW-45/5/R is a premium dual run capacitor with 45+5 µF capacitance and a robust 440V rating, designed to replace both 370V and 440V units. Engineered to meet rigorous USA and international standards, it ensures reliable operation across extreme temperatures (-40°C to 70°C) and comes with a 5-year durability guarantee. Its compact round design fits most condenser and heat pump air conditioners, delivering efficient motor start-up and sustained performance for compressor and fan motors alike.

Specifications

ASIN	B01NAZJYWA
Best Sellers Rank	#1,711 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #10 in Industrial Electrical Capacitors
Brand Name	PowerWell
Capacitance	45 Microfarad
Capacitance Tolerance	5
Customer Reviews	4.7 4.7 out of 5 stars (4,463)
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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