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Description
540-648 uF MFD 110-125 VAC ±20% CD60 Round Start Capacitor - Fits OEM Single Phase Motor, Heat Pump540 648 uF MFD 110 125 VAC Round Start Capacitor Key Features Capacitance: 540 648 microfarads (uF MFD) Voltage Rating: 110 125 Volts AC Frequency: 50 60 Hz Dimensions: 1 13 16 in. Diameter x 4 3 8 in. Height Terminals: 1 4 inch male quick connect Construction: Non polarized aluminum electrolytic Case: Hermetically sealed bakelite case resists oil, dirt, and moisture Duty Cycle: Intermittent, for motor starting applications Replaces Cross Reference
540-648 uF/MFD 110-125 VAC Round Start Capacitor
Key Features
- Capacitance: 540-648 microfarads (uF/MFD)
- Voltage Rating: 110-125 Volts AC
- Frequency: 50/60 Hz
- Dimensions: 1 13/16 in. Diameter x 4 3/8 in. Height
- Terminals: 1/4 inch male quick-connect
- Construction: Non-polarized aluminum electrolytic
- Case: Hermetically sealed bakelite case resists oil, dirt, and moisture
- Duty Cycle: Intermittent, for motor starting applications
Replaces / Cross-Reference Part Numbers
- Packard PMJ540A
- BMI 091A540B125CE7A
- UPC 840899105864
Compatibility & Fitment
- Application: Designed for starting single-phase AC motors
- Common Usage: Air conditioners, refrigeration units, compressors, furnace fan motors, and other motor-driven equipment
- Fits applications requiring a 540-648 MFD capacitor rated for 110V, 115V, or 125V systems
When to Replace
- Motor hums but does not start
- Slow or difficult motor startup
- Circuit breaker trips when the motor attempts to start
- Existing capacitor shows physical damage like bulging, cracking, or leaking fluid
- Capacitance measures outside the rated tolerance when tested with a multimeter
Installation Tips
- Disconnect all electrical power to the unit before servicing.
- Safely discharge the old capacitor using a suitable resistor across the terminals.
- Ensure the microfarad (uF/MFD) rating matches the original capacitor's specification.
- The new capacitor's voltage rating must be equal to or higher than the original.
- As a non-polarized capacitor, wires can be connected to either terminal.
- Secure the capacitor in its mounting bracket to prevent vibration.
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 ★★★★★
Based on 29 reviews
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Product Reviews
★★★★★ 4
Good quality, bad packaging
Size: One Size, Color: Black
Really good quality. It last a lot time but it came with the lid off. Like it was loose in the box so the packaging was not great but quality is good!
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Reviewed in the United States on November 18, 2025
★★★★★ 5
SIMPLY PERFECT
Size: 30mm, Color: Brown/Silver-Tone/White/30mm
If you can appreciate a watch that simply tells time, buy this beautiful watch. The band is made of quality leather, it’s easy to adjust to fit and stays in place. The watch face is clean, bright and easy to read the accurate time. The functionality to light the face by pressing the wind button in is a thoughtful feature. The watch is water “resistant” (you can wear the watch when washing dishes), but I wouldn’t shower with it on or submerge it in water just in case. This watch accessorizes with anything I’m wearing in an understated way. TIMEX is a time-proven quality watch maker and this particular watch is a great value! I highly recommend this simply perfect and beautiful watch.
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Reviewed in the United States on January 5, 2026
★★★★★ 5
Love this!
Size: 30mm, Color: Brown/Silver-Tone/White/30mm
Love this. It’s easy to read, but not too big. Just what I wanted. Love the band too!
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Reviewed in the United States on May 13, 2026
★★★★★ 5
5 stars!!! Just what I was looking for!
Size: 30mm, Color: Brown/Silver-Tone/White/30mm
This watch was just what I needed! Elastic bands had become too tight on my wrist and added to problems I was having. Quality is excellent as would be expected from Timex! The indigo light is an added bonus. Very nice watch for anyone! Easy to read quickly.
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Reviewed in the United States on May 8, 2026
★★★★★ 4
Perfect EXCEPT for the Noise
Size: 30mm, Color: Pink/Rose Gold-Tone/Cream/30mm, Size: 30mm, Color: Pink/Rose Gold-Tone/Cream/30mm
My ideals for a watch are: full numerals, easy to read (good contrast and numbers, lines for the minutes and hours), light up function, case under 33mm, swappable bands, and preferably cute, in either silver color or rose gold color.
This one checks all the boxes... And is the only one I've found which does. You can see on the picture that I replaced the band.
Now here's the problem... The watch is LOUD! The analog watch I'm replacing is entirely quiet except when brought to the ear. This one... I hear it from feet away. My husband hears it from feet away too. I've tried two of the same model and they're equally loud. It gets distracting for me. Not at night, as the blankets mute it up, but during the day. Holding my phone typing this up, or during work, conversations... even when driving I hear it over the engine and traffic noise, because the driving position brings it closer to me, tick tick tick tick. It's impressive how that sound can carry.
I've read on the internet a few people saying they improved the noise of their Timex watches by removing the hand that does the seconds. I love having it but I might just get desperate enough to try this little operation. This is the perfect watch for me except for that problem. So sad.
(EDIT: I did end up trying to remove the seconds hand. It did quiet down the watch. Unfortunately, I also broke the watch in the process of putting it back together. I've decided to cut my losses and I'm now wearing a Fossil Carlie Mini (roughly $100, and available on Amazon, entirely quiet). Doesn't light up or have full numerals but what can you do. I wear a cheap digital that can light up at night and make do.)
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Reviewed in the United States on April 17, 2026
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