8 Best Ingersoll Rand Air Compressor Start Capacitors (November 2026)
The best Ingersoll Rand air compressor start capacitors include the Swess RCO410 3 in 1 Compressor Hard for compatible 115V appliance compressors, the BOJACK SPP6 Hard Start Capacitor Replacement 115V-288VAC，Increases for higher starting torque applications, and the Sealed Unit Parts Co. for proven SPP6-style replacement.
On this page (6 sections)
- The best Ingersoll Rand air compressor start capacitor picks
- What should you check before buying an Ingersoll Rand capacitor?
- Can a refrigerator capacitor work on an Ingersoll Rand air compressor?
- How do you replace an air compressor start capacitor safely?
- Does oil affect Ingersoll Rand compressor capacitor choice?
- Which Ingersoll Rand air compressor start capacitor should you choose?
The best Ingersoll Rand air compressor start capacitor depends on the motor's original voltage, capacitance and wiring. For a compatible 250V, 400uF motor-start requirement, the Walfront CD60 is the strongest general match in this group.
That pick is a starting point, not a universal answer for every Ingersoll Rand model. Air compressor motors were not all wired the same way, and a capacitor that suits one workshop unit may be wrong for another motor with a different starting circuit.
Start by reading the original capacitor label and the motor nameplate before you compare products. Write down the voltage, capacitance, motor type, terminal layout and mounting style so each option can be judged against the same facts.
The brand name alone does not identify the correct replacement because these picks cover different voltage ranges, capacitance ranges and system types. A refrigerator hard-start kit, an air-conditioning hard-start kit and a plain CD60 capacitor may look similar in a parts drawer, but they do different jobs in the circuit.
Look for the original part number as well, since it can narrow the search quickly. If that number is worn away, the capacitor label and motor nameplate are usually the next best sources, followed by the wiring diagram for the exact compressor model.
It also helps to decide what has actually failed before ordering. A weak start capacitor, a separate run capacitor, a relay and an overload protector can cause related starting problems, yet each fault points to a different replacement part.
If you need a broader starting-capacitor overview, compare the options in our Best Air Compressor Start Capacitor guide. For brand-specific comparisons, see our guides to best DeWalt air compressor capacitor and best Craftsman air compressor capacitor.
Our picks at a glance
-
1
Best for compatible 115V appliance compressorsSwess RCO410 3 in 1 Compressor Hard
9.7/10 our score
See it on Amazon -
2
Best for higher starting torque applicationsBOJACK SPP6 Hard Start Capacitor Replacement 115V-288VAC，Increases
9.6/10 our score
See it on Amazon -
3
- 4
Check itWalfront CD60 Motor Capacitor Round Motor Start
Best for common 250V motor-start matching - 5
![[UL Listed] BlueStars 400-480 uF MFD](https://m.media-amazon.com/images/I/71ssZ5UDV5L._AC_SL500_.jpg)
Check it[UL Listed] BlueStars 400-480 uF MFD
Best for 400–480uF, lower-voltage matching - 6
Check itSeentech 216-259 uf/MFD 220-250 VAC ±20% CD60
Best for 220–250V CD60 replacements - 7
Check itLong Term Replace CSRU2 Compressor Saver Hard
Best for larger 3.5–5 ton systems - 8
Check itCPT0091 -ClimaTek Start Capacitor Replaces American Standard
Best for compatible 330V replacement needs
The best Ingersoll Rand air compressor start capacitor picks
The best choice is the one that matches the original electrical values and terminal layout. The products below are ordered by score, but a lower-ranked capacitor can be the correct choice when its specifications match your Ingersoll Rand motor.
We compared the stated voltage, capacitance, motor use, mounting style and hard-start features against the needs of a compressor capacitor replacement. Our score weighs specs, features and buyer feedback against what you're shopping for.
| Product | Best for | Voltage | Capacitance | Application | Our score |
|---|---|---|---|---|---|
| Swess RCO410 3 in 1 Compressor Hard | compatible 115V appliance compressors | 115V | 243–292 MFD | Compatible refrigerator and freezer compressors | 9.7 |
| BOJACK SPP6 Hard Start Capacitor Replacement 115V-288VAC，Increases | higher starting torque applications | 115–288VAC | Compatible air-conditioning and compressor systems | 9.6 | |
| Sealed Unit Parts Co. | proven SPP6-style replacement | Compatible air-conditioning and heat-pump systems | 9.6 | ||
| Walfront CD60 Motor Capacitor Round Motor Start | common 250V motor-start matching | 250V AC | 400uF | 9.2 | |
| [UL Listed] BlueStars 400-480 uF MFD | 400–480uF, lower-voltage matching | 165VAC | 400–480uF | 8.9 | |
| Seentech 216-259 uf/MFD 220-250 VAC ±20% CD60 | 220–250V CD60 replacements | 220–250VAC | 216–259uF | 8.9 | |
| Long Term Replace CSRU2 Compressor Saver Hard | larger 3.5–5 ton systems | 120V | 8.4 | ||
| CPT0091 -ClimaTek Start Capacitor Replaces American Standard | compatible 330V replacement needs | 330V | 135–162 MFD | 8.2 |
Swess RCO410 3 in 1 Compressor Hard: Best for compatible 115V appliance compressors
- 3-in-1 relay, overload and start capacitor
- 115V operation
- 243–292 MFD
- For compatible 1/4–1/3 HP compressors
This 3-piece kit combines a relay, overload protector and start capacitor for compatible 115V, 1/4–1/3 HP compressor systems.
Pros
- Combines 3 starting components
- Pre-wired design
- Includes 3 kits
Cons
- Not a universal air compressor capacitor
- Requires an exact voltage and horsepower match
The Swess RCO410 is the most specialized pick here. It combines a relay, overload protector and start capacitor in one pre-wired unit, and the package includes 3 kits.
Its stated fit is for compatible 115V refrigerator and freezer compressors rated from 1/4 to 1/3 HP, with 243–292 MFD capacitance. That makes it a poor choice for an Ingersoll Rand air compressor unless the motor has the same electrical requirements and the wiring matches.
The 3-in-1 design can simplify replacement when all 3 starting components are part of the repair. It is an aftermarket part, not a universal replacement for every compressor brand or motor type.
Check the original part number, voltage, horsepower and wiring diagram before using this kit. Do not treat the compact housing as proof that it fits an air compressor motor.
For a true refrigerator or freezer repair, the pre-wired layout may suit a technician or a confident DIY user who is already comfortable with appliance wiring. For an air compressor, the household appliance application is the main warning sign.
BOJACK SPP6 Hard Start Capacitor Replacement 115V-288VAC，Increases: Best for higher starting torque applications
- 115–288VAC range
- 500% starting torque claim
- Piggyback terminals
- For compatible PSC and CSIR systems
The SPP6 uses a start capacitor and PTC thermistor in a hard-start kit with piggyback terminals for compatible compressor systems.
Pros
- Wide stated voltage range
- Two-wire connection options
- Multiple replacement part numbers
Cons
- System compatibility must be confirmed
- Not a direct match for every Ingersoll Rand motor
The BOJACK SPP6 is the strongest hard-start option when your compressor system supports its stated 115–288VAC range and connection method. It combines a starting capacitor with a PTC thermistor and uses piggyback terminals.
BOJACK claims the kit can increase compressor starting torque by 500%. That is a brand claim, not a guarantee for every motor, so match the compressor type and wiring before installation.
The kit supports compatible permanent split capacitor systems and some capacitor-start induction-run systems. Its replacement references include TJ90HS6, AP4502872, HS6, HS650, 35702, DST-6 and EPP6.
Choose it when you need a hard-start kit rather than a plain replacement capacitor. For a basic capacitor swap, use the motor's original capacitance and voltage as the deciding factors.
The piggyback terminals are useful when the run capacitor terminals are already crowded. They can reduce rewiring, but they do not remove the need to confirm which wires belong on each side of the run capacitor.
Sealed Unit Parts Co.: Best for proven SPP6-style replacement
- SPP6 relay and capacitor kit
- 500% starting torque claim
- For PSC single-phase systems
- Round housing
This SUPCO SPP6 kit combines a relay and capacitor for compatible permanent split capacitor single-phase systems.
Pros
- Recognizable SPP6 format
- Designed for PSC systems
- Copper material
Cons
- Application is not universal
- Verify the motor circuit before installation
The SUPCO SPP6 is another hard-start kit for compatible permanent split capacitor, single-phase systems. It combines a relay and capacitor and is intended for air-conditioning and heat-pump applications.
Its stated starting-torque increase is 500%. The key buying question is compatibility, since an SPP6-style kit is not automatically correct for an Ingersoll Rand compressor motor.
This round unit uses insert mounting and has a copper material listing. It is a useful option when your existing system calls for the SPP6 model or an approved equivalent.
Confirm the motor's wiring and original part references before replacing a failed capacitor with a relay-capacitor kit. If you need a step-by-step safety checklist, read How To Change Capacitor On Air Compressor?.
This kind of kit suits a system that was designed for a relay-capacitor hard-start setup. It is less suitable when the original compressor uses only a plain start capacitor with no relay in that role.
Walfront CD60 Motor Capacitor Round Motor Start: Best for common 250V motor-start matching
- 250V AC rating
- 400uF capacitance
- 50/60Hz single-phase motor use
- Round CD60 housing
The Walfront CD60 is a straightforward motor-start option for compatible single-phase air compressor motors that call for 250V and 400uF.
Pros
- Clear voltage and capacitance
- Designed for air compressors and other motors
- 50/60Hz use
Cons
- One capacitor only
- The motor's original rating must match
The Walfront CD60 is the best general-purpose match in this roundup for a compatible 250V AC, 400uF, 50/60Hz single-phase motor. Its stated applications include air compressors, air-conditioning motors, water pumps and fans.
The round capacitor uses a snap-in mount and has a plastic housing. Its 400uF value is the main reason it ranks highly, but that value must match the motor's required starting capacitance.
This is a plain motor-start capacitor, so it may be a better fit than a hard-start kit when the original Ingersoll Rand component is a separate CD60-style capacitor. Compare the terminals and physical dimensions before ordering.
Choose this model when the original part calls for 250V and 400uF. Do not substitute it for a 115V, 165V or 330V capacitor only because the housing looks similar.
The clear voltage and capacitance markings make this option easier to check against an old part. That clarity is helpful, but it does not change the basic rule that the motor specification comes first.
[UL Listed] BlueStars 400-480 uF MFD: Best for 400–480uF, lower-voltage matching
- 400–480uF range
- 165VAC rating
- 50/60Hz motor-start use
- Round housing
BlueStars fits a narrower motor-start requirement where the original capacitor calls for 400–480uF and 165VAC.
Pros
- Clear capacitance range
- Round form factor
- Anti-explosion pressure switch
Cons
- 165VAC is not a substitute for a higher voltage rating
- Physical dimensions need checking
BlueStars fits a narrower requirement: a 400–480uF motor-start capacitor rated at 165VAC. It is intended for fractional-horsepower, single-phase motor starting and uses a round housing.
The stated operating temperature range is -40℃ to 65℃, and the capacitor includes a 10,000 AFC anti-explosion pressure switch. BlueStars also identifies the part as suitable for 50/60Hz AC electric motor use.
Its 165VAC rating is the deciding detail. It should not replace a capacitor that requires 250VAC or 330VAC, even if the capacitance range appears close.
Measure the available space because the stated dimensions are about 1.8 in wide by 3.38 in high. Check the original mounting method and terminal position as well.
This option suits a motor that already specifies the 400–480uF and 165VAC combination. It is a poor fit when the original label shows a different voltage, even if the round shape and capacitance seem familiar.
Seentech 216-259 uf/MFD 220-250 VAC ±20% CD60: Best for 220–250V CD60 replacements
- 216–259uF range
- 220–250VAC rating
- CD60 round housing
- 50/60Hz motor-start use
This Seentech CD60 suits compatible motors that specify a 220–250VAC start capacitor in the 216–259uF range.
Pros
- Higher-voltage option
- Clear capacitance range
- Through-hole mounting
Cons
- Not interchangeable with a 115V part
- Confirm the motor type and terminal layout
The Seentech CD60 is a higher-voltage option for compatible motors that specify 216–259uF and 220–250VAC. It is designed for single-phase motor applications and uses a round, through-hole mount.
Its ±20% capacitance tolerance is part of the stated specification. The product is described for air conditioners, refrigerators, pumps and other compatible motor equipment, but those broad uses do not replace a motor-specific match.
This model is useful when your original capacitor falls in the 216–259uF range and the motor requires a 220–250V rating. It is not a substitute for a 115V component.
Choose it when the voltage and capacitance are both close to the original part. Also compare the wiring, terminal type and available clearance before installing it.
The wider tolerance range can make matching easier, but it should not be treated as permission to ignore the original rating. A close range on paper still needs the right voltage, terminals and mounting style.
Long Term Replace CSRU2 Compressor Saver Hard: Best for larger 3.5–5 ton systems
- For stated 3.5–5 ton AC units
- 3 color-coded wires
- Includes cable tie and screws
- ZRUB hard-start kit
This ZRUB hard-start kit targets larger air-conditioning systems and uses color-coded connections for common, start and run.
Pros
- Includes mounting hardware
- Color-coded wiring
- Designed for larger systems
Cons
- Not a general capacitor replacement
- The stated tonnage range must match the system
The Long Term ZRUB is a compressor saver hard-start kit for stated 3.5–5 ton air-conditioning units. It includes the kit, a cable tie and 2 screws, with 3 color-coded wires for common, start and run connections.
The stated wiring pattern is black to common, striped to start and red to run. That makes the wiring easier to identify, but you still need to follow the equipment diagram and confirm the system is within the stated tonnage range.
This is not a general replacement for a small Ingersoll Rand motor capacitor. It is better suited to a larger compatible compressor system that needs a hard-start assembly rather than a single capacitor.
The manufacturer describes the kit as a professional service tool. If you are unsure about compressor terminals or stored electrical charge, use a qualified technician.
Color-coded wires can help during installation, yet they do not make compressor wiring foolproof. The existing connections still need to be identified correctly before any wire is moved.
CPT0091 -ClimaTek Start Capacitor Replaces American Standard: Best for compatible 330V replacement needs
- 135–162 MFD range
- 330V rating
- Round housing
- Designed for Trane and American Standard units
ClimaTek's CPT0091 replacement is worth considering only when the original capacitor and motor system match its 330V and 135–162 MFD range.
Pros
- High voltage rating
- Clear replacement part number
- Round form factor
Cons
- Designed for specific unit families
- Not a universal Ingersoll Rand replacement
The ClimaTek CPT0091 is the specialist choice for a 330V start capacitor rated at 135–162 MFD. It is designed for Trane and American Standard units, so an Ingersoll Rand owner should use it only when the original part and system requirements match.
The round capacitor uses a through-hole mount. Its listed capacitance is 148.5 millifarad, which sits inside the stated 135–162 MFD range.
The 330V rating makes this a poor substitute for a lower-voltage component. Confirm the original part number, capacitance, voltage, terminal arrangement and available space before buying.
Choose it for a confirmed CPT0091-style replacement need. Do not choose it simply because a higher voltage number sounds safer.
This is a part for a confirmed replacement match, not a general upgrade for another brand of compressor. The stated unit family and part number matter as much as the electrical values.
What should you check before buying an Ingersoll Rand capacitor?
Check the voltage and capacitance printed on the original capacitor first. Then confirm the motor type, terminal arrangement, mounting style and physical clearance.
A capacitor's voltage rating must suit the circuit. The capacitance value also matters because the motor is designed to use a specific starting range.
The BlueStars, Seentech, Walfront and ClimaTek options show why these values cannot be chosen by appearance alone.
Hard-start kits add another layer. The BOJACK and SUPCO SPP6 products combine starting components for particular compressor systems, while the Long Term ZRUB targets a stated air-conditioning tonnage range.
Use the original part number when available, but verify it against the motor nameplate and wiring diagram. If you want to test the old part before ordering, see How To Check Air Compressor Capacitor?.
Can a refrigerator capacitor work on an Ingersoll Rand air compressor?
A refrigerator capacitor should not be used on an Ingersoll Rand air compressor unless the voltage, capacitance, horsepower, motor type and wiring all match. The Swess RCO410 is specifically described for compatible 115V refrigerator and freezer compressors rated from 1/4 to 1/3 HP.
That narrow application makes it different from a general motor-start capacitor. The presence of a relay and overload protector also means it is a complete starting assembly, not just a capacitor.
Refrigerator compressors and air compressor motors can both need help to start, but that similarity is only a starting point. Their circuits, loads, duty patterns and housings are built for different jobs, so a part made for one type should never be assumed to suit the other.
Horsepower is another useful check because it points to the size of motor the part was designed around. A small appliance compressor range may not line up with the motor in a workshop air compressor, even when the voltage looks familiar.
Wiring also needs close attention because a 3-in-1 kit has more to match than a single capacitor. The relay and overload functions must fit the compressor circuit, not just the motor voltage, before the kit can be considered.
Compare the compressor's original component with the replacement before installation. If the system uses a separate start capacitor, a CD60-style option may be more relevant than a 3-in-1 refrigerator kit.
The safest approach is to treat the refrigerator kit as appliance-specific unless every stated requirement lines up. If any part of the original label, nameplate or diagram points elsewhere, choose a part made for the actual motor type instead.
How do you replace an air compressor start capacitor safely?
Disconnect power and follow the equipment wiring diagram before touching the capacitor. Capacitors can retain electrical charge, so use the correct discharge and verification procedure for the equipment.
Take a clear photo of the existing connections before removing wires, but do not rely on the photo alone. Mark each terminal and compare it with the replacement's diagram.
Do not install a capacitor with a different voltage or capacitance range just because it fits the bracket. If the motor hums, trips protection or still will not start after a correct replacement, the fault may involve wiring, the start relay, the motor or a mechanical load.
For the full replacement sequence, use our guide on How To Change Capacitor On Air Compressor?.
Does oil affect Ingersoll Rand compressor capacitor choice?
Compressor oil does not determine the capacitor's voltage or capacitance, but the correct oil still matters for the compressor system. Keep the electrical repair separate from lubrication decisions.
Oil and capacitors solve different problems inside a compressor. One supports moving parts and heat control, while the other helps the motor start, so a fault in one area does not automatically mean the other part needs a different specification.
If your repair also involves an oil change or service interval, see What Oil For Ingersoll Rand Air Compressor?. Use the compressor model and manufacturer requirements when choosing oil.
That model check matters because different Ingersoll Rand compressors can have different lubrication needs. The oil choice should follow the compressor manual, not the capacitor label or the parts in this roundup.
Do not use an oil problem as a reason to change capacitor values. Match the electrical component to the motor and original capacitor specifications.
It is still worth checking the wider service picture during a repair, since a hard-starting compressor may need more than one kind of attention. Electrical matching should stay strict, while lubrication decisions should be made on their own terms.
Which Ingersoll Rand air compressor start capacitor should you choose?
Choose the Walfront CD60 when your motor calls for 250V and 400uF. Choose the Seentech CD60 for a confirmed 220–250VAC, 216–259uF requirement, or BlueStars for a matching 165VAC, 400–480uF requirement.
Pick the BOJACK SPP6 or SUPCO SPP6 when the compressor system requires a compatible hard-start relay-capacitor kit. Choose the Long Term ZRUB only for a matching larger system, and use the Swess or ClimaTek options only when their specific appliance or unit requirements match.
Those choices show why the original label matters more than the product ranking. A lower-ranked option can be the right one when its voltage, capacitance, terminals and mounting match the motor, while a higher-ranked option can be wrong for a different circuit.
For a plain capacitor replacement, start with the old part markings and the motor nameplate. For a hard-start kit, start with the compressor type and wiring diagram, because the kit must fit the starting circuit as a whole.
The best Ingersoll Rand air compressor start capacitor is the one that reproduces the original electrical requirements, terminals and mounting method. Verify those details before ordering, and stop the repair if the motor or wiring fault is not clear.
If the markings are missing, do not guess from size or appearance alone. Use the part number, model information or a technician when the original specification cannot be confirmed.
Our top 3 picks at a glance
-
1
Best for compatible 115V appliance compressors
Swess RCO410 3 in 1 Compressor Hard
9.7/10 our score
See it on Amazon -
2
Best for higher starting torque applications
BOJACK SPP6 Hard Start Capacitor Replacement 115V-288VAC，Increases
9.6/10 our score
See it on Amazon -
3
Frequently asked questions
What is the best Ingersoll Rand air compressor start capacitor?
The Walfront CD60 is the best general pick in this group when your motor calls for a 250V, 400uF start capacitor. Other motors may need a different voltage, capacitance range or hard-start kit.
Match the original part markings and motor requirements before ordering.
How do I match a start capacitor to an Ingersoll Rand compressor?
Match the original capacitor's voltage, capacitance, shape, terminals and mounting method. Also confirm the motor's horsepower and whether it uses a start capacitor, run capacitor or hard-start kit.
A higher or lower rating is not automatically a safe substitute.
Can I use a hard-start kit on an air compressor?
Only when the kit is compatible with the compressor motor and wiring. BOJACK SPP6 and SUPCO SPP6 are designed for specific single-phase compressor systems, while the Long Term ZRUB kit targets stated 3.5–5 ton air-conditioning units.
Check the wiring diagram first.
What happens if an air compressor start capacitor is the wrong size?
The motor may fail to start, draw abnormal current or suffer electrical damage if the capacitor does not match its design. Do not choose by physical size alone.
Compare voltage, capacitance, motor type, terminals and the original part number.
Should I replace the capacitor or the motor?
Replace the capacitor only when inspection and electrical checks point to a failed capacitor and the replacement matches the motor. A compressor that still hums, trips protection or fails with a known-good capacitor may have another electrical or mechanical fault that needs diagnosis.
