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Description
340-408 uF MFD 110-125 VAC ±20% Round Start Capacitor 50/60 Hz - Fits Single-Phase Motors, Gear Motors - 2 Pack340 408 uF 110 125 VAC 20% Volts Round Start Capacitor Key Features Capacitance: 340 408 MFD uF Voltage: 110 125 VAC Frequency: 50 60 Hz Tolerance: 20% Operating Temperature: 40C to +65C ( 40F to 149F) Shape: Round with a moisture and oil resistant case Terminals: Standard 1 4 inch dual blade quick connect Duty Cycle: Rated for up to 20 starts per hour at a 3 second duration Quantity: Includes two capacitors Replaces Cross Reference Part Numbers
340-408 uF 110-125 VAC ±20% Volts Round Start Capacitor
Key Features
- Capacitance: 340-408 MFD/uF
- Voltage: 110-125 VAC
- Frequency: 50/60 Hz
- Tolerance: ±20%
- Operating Temperature: -40°C to +65°C (-40°F to 149°F)
- Shape: Round with a moisture and oil-resistant case
- Terminals: Standard 1/4 inch dual blade quick-connect
- Duty Cycle: Rated for up to 20 starts per hour at a 3-second duration
- Quantity: Includes two capacitors
Replaces / Cross-Reference Part Numbers
- Replaces any start capacitor with the same capacitance range and voltage rating.
- Commonly replaces part numbers such as Packard PMJ340.
- Interchangeable with capacitors from brands like BMI and TEMCo that meet equivalent electrical specifications.
Compatibility & Fitment
- Designed for use in single-phase AC electric motors to provide starting torque.
- Suitable for applications including HVAC units, air compressors, well pumps, refrigeration units, and various gear motors.
- Features a standard round case and snap-in mounting type for broad compatibility.
When to Replace
- Motor hums but fails to start or is slow to reach operating speed.
- Circuit breaker trips during motor startup.
- The existing capacitor shows physical damage, such as bulging, cracking, or leaking fluid.
- A multimeter test indicates the capacitance is outside the specified tolerance range.
Installation Tips
- Disconnect all electrical power to the motor before installation.
- Safely discharge the existing capacitor by shorting the terminals with a suitable resistor or an insulated tool.
- Confirm the new capacitor's uF/MFD range and voltage rating match the original part. The voltage rating can be equal to or higher than the original.
- Note the wire positions before disconnecting. AC start capacitors are non-polarized.
- Securely mount the new capacitor and firmly connect the wires to the terminals.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
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Product Reviews
★★★★★ 5
Great wire
Size: 2 Colors each 10FT, Style: 22AWG
I needed a flexible durable wire to fix an old model train. It worked perfect. Wire is generally wire. If you require all the special features of this wire it will meet all your needs
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Reviewed in the United States on February 4, 2020
★★★★★ 5
Great connectors
Size: 5 pairs
Just finished an overhaul on the stereo system. A couple decks needed new belts and the wife wanted a new cabinet for everything so just take it all apart and refresh. I ordered these plugs to make the backside wiring a bit neater . They are very well made and easy to install if you mess up the polarity just swap the arrel covers, easy peasy. Great quality and easy assembly. Did it improve the sound? Can't say that I noticed that but it is certainly as good and so much easier to connect speaker outputs. I would certainly buy again.
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Reviewed in the United States on February 26, 2026
★★★★★ 5
High Quality Banana Plugs
Size: 12 Pairs
Banana clips are high quality, I used 12 awg wires and had no issues. It secures into the plug with 2 small screws, you will need a flat terminal screw driver to install them. The quality was high and made a good connection. If I had to make one complaint it would be that I would tighten the gray piece to the plug and it always kept spinning, otherwise, excellent product.
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Reviewed in the United States on January 29, 2026
★★★★★ 5
Good quality connectors
Size: 6 Pairs
Good quality connectors, holds wire well and stays in place. I’ll buy again
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Reviewed in the United States on March 1, 2026
★★★★★ 4
Worked fine for me
Size: 10 Pairs
I saw some reviews that mention difficulty in threading or fitting. They are tight, but they work fine. I had no issues installing the speaker wire and no issues with the set/crimping screws. I even had one fall out when I loosened it too much and, though it was challenging without my glasses, I did get it to thread back in with no problems. I have purchased other BluRigger products, like HDMI cables, and they are of great quality.
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Reviewed in the United States on December 19, 2024