Top 10 Best spp6 in 2026

Last Updated - 6/9/2026

🏆Best Choice

AMI PARTS

SPP6 Hard Start Capacitor Replacement 115V Thru 288VAC Hard Start kit for air Conditioner Units from 4,000 to 120,000(1/2 Thru 10H.P.),Increases Compressor Torque 500% by AMI PARTS

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•【Parts Number】: The SPP6 Compressor Hard Start Booster Capacitor can save stuck compressor by increasing the compressor’s starting torque by 500%
•【Replaces part numbers】: SPP6, TJ90HS6,AP4502872,35702, DST-6, ERPP6, HS6, HS650
•【Superiority】: The solid-state relay and hard start capacitor no loose parts or complicated wiring. Just wire it across your run capacitor. Saves you a service fee from the appliance guy! Inexpensive way to fix or repair
•【Quality Guaranteed】: The replacement part is made from high quality material and well-tested by the manufacturer.Be sure to disconnect the power supply before starting maintenance
•【Excellent After-sales Service】:We are full of confidence in the quality of Our SPP6 Compressor Hard Start. We have a professional feedback team. You can give us feedback at any time during this period, and we will provide you with a satisfactory solution within 12 hours, Don’t hesitate to solve the dryer problem easily

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$13.99

$14.99

-7%

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Sealed Unit Parts Co., Inc.

SUPCO SPP6 Relay/Capacitor Hard Start Kit with 500% Increase Starting Torque

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•Relay/capacitor hard start kit 500% incr starting torque
•Increased compressor starting torque. Designed for use on permanent split capacitor single phase a/C and heat pump systems
•The country of origin is china

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$17.03

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FRIOCASA

FRIOCASA SPP6 Hard Start Kit for Air Conditioner, Replacement 115V Thru 288VAC, Hard Start Capacitor Units from 4,000 to 120,000(1/2 Thru 10H.P.),Increases Compressor Torque 500%

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•Part Number: SPP6 hard start capacitor, suitable for rated voltage of 115 to 288 VAC for the starting motor, increase the starting torque of the compressor by 500%
•Multiple Compatibility: Suitable for various air conditioning compressors, including 4000 BTU to 120000 BTU air conditioning units, hard start kit can be used for refrigeration compressors, heat pumps, and other heavy duty or frequently started motors
•Easy and Convenient: two wire installation, Just wire it across your run capacitor. The start relay adds new life to old refrigerators and freezers by providing additional power to the compressor, avoiding low voltage starting problems
•High Quality Materials: Replacement partsare made of high quality materials and arefully tested by the manufacturer to ensurethe durability of the product. Helps with "hard start" issues, where the AC power supply is difficult to connect and suddenly shuts off after a short period of time
•Attention: Please be sure to disconnect the power before starting use to avoid the risk of electric shock

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$11.99

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Powswopx

2 Pack SPP6 Hard Start Capacitor Replacement 115V Thru 288VAC Compatible with Air Condtioning Units from 4,000 to 120,000 (Supco Relay 1/2HP-10HP 500% Increase Starting Torque)

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•【Part number】: SPP6 Hard Start Capacitor Replacement. SPP6 compressor hard start boost capacitor can save compressor aging by increasing compressor starting torque by 500%. Made exactly fit for air conditioning compressors from 4000 BTU window units to 120000 BTU commercial units
•【Fit】: Compatible with TJ90HS6, AP4502872, HS6, HS650, 35702, DST-6, EPP6, HS6, HS650. Widely used in air conditioner start capacitor, Air conditioner soft start, AC hard start kit, AC capacitor, hvac capacitor, hvac hard start kit etc. Compatible for All PSC Single Phase AC115V-288V
•【Easy to Fix】: Connect the two wires from the SPP6 in parallel with the run capacitor(one wire each side)without removing any original wires. Only need to be connected in parallel with the running capacitor.Easy to install, saves time and effort and can save you a large amount of maintenance costs
•【Note】: Use special"piggy back"terminal of the SPP6 if all the run capacitor terminals are being used. Install only on PSC units equipped with run capacitor⚠Be sure to disconnect the power supply before starting maintenance. Danger of electric shock To prevent serious personal injury caused by electric shock, ensure that the power supply of electrical appliances is switched off
•【Package Includes】: 2 X SPP6 Hard Start Capacitor. Replace for Appliance produces noise during startup; System takes a while to startup; Want to reduce energy consumption

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$15.99

$16.99

-6%

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AMI PARTS

AMI PARTS SPP6 Hard Start Capacitor Replacement 115V Thru 288VAC Hard Start kit for air Conditioner Units from 4,000 to 120,000(1/2 Thru 10H.P.),Increases Compressor Torque 500% 2pcs

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•[Data Specification]：The SPP6 Compressor Hard Start Booster Capacitor can save stuck compressor by increasing the compressor’s starting torque by 500%. Made exactly fit for air conditioning compressors from 4000 BTU window units to 120000 BTU commercial units
•[High Compatibility]：The capacitors are used for starting and running of AC motors with frequencies of 50Hz/60Hz and are widely used in central replacement air conditioners, heat pumps, condenser fan motors, refrigerators, washing machines and compressors
•[Part Numbers]: TJ90HS6, AP4502872, HS6, HS650, 35702, DST-6, EPP6, HS6, HS650. The SPP6 replacement part is made from high quality material and well-tested by the manufacturer.Be sure to disconnect the power supply before starting maintenance
•[Superiority]: The solid-state relay and hard start capacitor no loose parts or complicated wiring. Just wire it across your run capacitor. Saves you a service fee from the appliance guy! Inexpensive way to fix or repair.Warning! - Danger of electric shock To prevent serious personal injury caused by electric shock, ensure that the power supply of electrical appliances is switched off
•[Excellent After-sales Service]: We are full of confidence in the quality of Our SPP6 Compressor Hard Start. We have a professional feedback team. You can give us feedback at any time during this period, and we will provide you with a satisfactory solution within 12 hours, Don’t hesitate to solve the dryer problem easily

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$19.99

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Supco

SUPCO SPP-6 Super Boost Start Capacitor, 130-156µf Size, 1/2-10 hp, 90-277Vac

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•Ptc positive temperature coefficient relay and capacitor
•Easy 2-wire installation
•Increase in torque 500 percent
•Can be used on psc type compressors
•Most economic

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$14.75

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Supco

Supco SPP6E E Series Electronic Potential Relay Style Hard Start Kit, 1/2 - 3 Horsepower Range, 88-106F Capacitor Size

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Electronic potential relay for starting motors
•Two-wire connection for installation
•Back-up electronic timing circuit to protect the compressor
•Voltage-sensing capability
•UL recognized for safety and NATE certified for HVAC applications

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$43.90

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TOMOON

SPP6 Hard Start Capacitor for AC Compressor 120-288V AC（PTC,1/2 Thru 10 H.P.） Compatible with Su-pco Relay Increases Compressor - 500% Increase Starting Torque by TOMOON

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•HARD START KIT: PTC relay capacitors increase torque by 500%, saving aging compressors from failure to start - intermittent starting - noisy compressors.Helps reduce current start time and improve overall efficiency
•WIDE RANGE:Replacement parts SPP6,TJ90HS6,AP4502872,35702,DST-6,ERPP6,HS6,HS650.For use on PSC type compressor starter motors rated 115-288, 1/2 to 10HP,such as refrigeration compressors,heat pumps,refrigerators,heavy-duty frequent start motors
•SPP6 CAPACITY UPGRADE 1: Adopting edge-thickened metallized zinc-aluminum film as electrode dielectric and internal components wrapped with epoxy resin, it has good overload capacity, stable performance and high insulation resistance
•SPP6 CAPACITY UPGRADE 2: Hard start kit spp6 hard start capacitor is made of PBT plastic case, which has the advantages of high temperature resistance, fast heat dissipation and mois-ture resistance. Different from the cheap hard start capacitor
•SPP6 CAPACITY UPGRADE 3: Adopting thickened copper lead wire, it is not easy to oxidize and has stable operation.Hard start kit ac capacitor has the advantages of small size, light weight, low loss and good electrical performance
•TWO-WIRE INSTALLATION: The motor spp6 start capacitor and PTC thermistor are wired in series with no complicated wiring. Be sure to disconnect all power sources before beginning service on the boost relay and hard start capacitor spp6
•ABOUT TOMOON -- If you encounter problems during use SPP6 AC hard start capacitor, please contact us in time, we will do our be-st to solve the problem for you. Your satisfaction is our greatest pursuit

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$12.49

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Supco

Supco SPP6 Hard Start Kit

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•Supco Brand item
•Manufacturer model SPP6
•This is a genuine replacement part
•Model number: SPP6

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$15.97

$17.84

-10%

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Supco

Supco SPP6, Relay Start Capacitor 120-288V

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•Genuine OEM replacement part
•Supco offers products and services in the industrial food service industry and dedicated to providing quality equipment
•Uses OEM parts for safety, reliability, and performance
•Approved by original equipment manufacturer (OEM)
•Not intended for anything other than specified designed usage

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$16.39

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