DAYTON 2MDX6 Dual Capacitor Mfd 25/5 3/4 370VAC

( Brand: Dayton ), ( Manufacturer Part Number: 2MDX6 ), ( Shaft Diameter: 3/4 In ), ( Rated Load: Hp ), ( Current Type: Ac ), ( Country Of Origin: China )

Review DAYTON Dual Run Capacitor 25/5 Mfd 3/4 Inch370vac

The **Dayton 2MDX6 Dual Capacitor (25/5 F, 3/4" Mounting, 370VAC)** is a high-performance, dual-element capacitor designed for demanding industrial and commercial applications where reliability and efficiency are paramount. Engineered with precision, this capacitor features a robust **dual-capacitor configuration**, combining a **25 F** and a **5 F** element in a single housing, allowing for versatile use in motor starting, run, and correction circuits. The **370VAC** rating ensures compatibility with standard single-phase and three-phase systems, making it ideal for use in compressors, pumps, fans, and other high-power equipment where voltage fluctuations or inrush currents are common. Its **3/4-inch mounting design** provides a compact yet sturdy form factor, allowing for easy installation in tight spaces while maintaining structural integrity under heavy loads. Constructed with high-quality materials, including a durable **polypropylene dielectric**, this capacitor offers exceptional longevity, resistance to temperature variations, and protection against moisture and environmental contaminants. The **low-loss construction** minimizes energy waste, improving overall system efficiency, while its **self-healing properties** help prevent catastrophic failure by sealing minor internal faults. Whether used in HVAC systems, industrial machinery, or energy correction applications, the Dayton 2MDX6 delivers consistent performance, reduced harmonic distortion, and extended equipment lifespan, making it a trusted choice for professionals seeking dependable electrical components.

The Dayton 2MDX6 dual capacitor (25/5 F, 3/4" mounting, 370VAC) is a popular choice for audio and power applications, particularly in amplifier circuits and power supplies. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

1. **High Quality Construction** Dayton is known for manufacturing reliable, high-quality capacitors, often preferred by audiophiles and DIY electronics enthusiasts for their durability and performance.

2. **Dual Capacitance (25/5 F)** The dual configuration (25 F 5 F) is useful in circuits where both bulk and smoothing capacitance are required, such as in power supply filtering or audio coupling.

3. **High Voltage Rating (370VAC)** The 370VAC rating makes it suitable for applications where higher voltage tolerance is necessary, such as in power amplifiers or high-voltage power supplies.

4. **Compact Size (3/4")** The small form factor allows for easy installation in tight spaces, making it ideal for custom-built projects where space is limited.

5. **Low Impedance & Good ESR** These capacitors typically exhibit low equivalent series resistance (ESR) and reactance, which helps in reducing ripple and improving transient response in power supplies and audio circuits.

6. **Long Lifespan** High-quality electrolytic capacitors like this one are designed for extended service life, especially when operated within their rated voltage and temperature limits.

7. **Audiophile-Grade Performance** Many audiophiles prefer Dayton capacitors for their clean sound and minimal distortion in audio applications, particularly in preamp and power amp circuits.

8. **Wide Availability & Compatibility** These capacitors are commonly used in aftermarket audio upgrades and are easy to find in electronics stores or online retailers.

---

1. **Electrolytic Capacitor Limitations** Like all electrolytic capacitors, these have a finite lifespan and can degrade over time, especially if subjected to high temperatures or overvoltage conditions. They may eventually leak or fail catastrophically.

2. **Temperature Sensitivity** Performance can degrade if operated outside the recommended temperature range (typically 0 C to 85 C). Excessive heat can reduce lifespan and increase leakage current.

3. **Polarity Must Be Observed** These are polarized capacitors, meaning reverse polarity can cause immediate failure or damage to connected circuitry. Always double-check polarity during installation.

4. **Not Ideal for High-Frequency Applications** While suitable for audio and low-frequency power smoothing, electrolytic capacitors are not optimal for high-frequency filtering due to their inherent ESR and inductance.

5. **Cost Compared to Film or Ceramic** For some applications, film or ceramic capacitors may offer better longevity and stability at a similar or lower cost, though they are less common in high-current audio applications.

6. **Potential for Leakage** Over time, electrolytic capacitors can develop leakage currents, which may require periodic inspection, especially in critical power supply circuits.

7. **Limited Current Handling** While this capacitor is robust for its size, it is not designed for extremely high current applications (e.g., high-power switching supplies). For such cases, larger or specialized capacitors may be needed.

8. **Replacement Difficulty** If this capacitor fails in a custom-built project, sourcing an exact replacement may be challenging, though Dayton offers a wide range of compatible alternatives.

---

The Dayton 2MDX6 dual capacitor is an excellent choice for **audio applications (e.g., preamps, power amps, coupling, and power supply smoothing)** where reliability, compact size, and high voltage tolerance are important. Its dual configuration (25/5 F) makes it versatile for filtering and coupling tasks, and its reputation for quality ensures long-term performance in well-designed circuits.

However, if the application involves **high-frequency work, extreme temperature conditions, or high-current demands**, alternative capacitor types (e.g., film, ceramic, or specialized electrolytics) may be more suitable. Additionally, users should ensure proper installation (correct polarity, adequate ventilation, and voltage derating if operating below the maximum rating) to maximize lifespan and performance.

For most **DIY audio projects, power amplifier builds, or aftermarket upgrades**, this capacitor is a **strong recommendation** due to its balance of performance, reliability, and availability. If budget allows, pairing it with high-quality film or ceramic capacitors for high-frequency roles can further enhance circuit performance.

Buy the Dayton 2MDX6 if you need a **durable, high-quality dual electrolytic capacitor for audio or power supply applications** where space and voltage requirements align with its specifications. Ensure proper installation and monitor for signs of degradation over time. For critical or high-reliability systems, consider supplementing it with other capacitor types where appropriate.

Details:

At this time, Turned out to be my blower motor on the air conditioner unit. That I did not need. This is from my old air conditioner that ran R12 capacitors was checked and functioning just fine. Not the Capacitor I've had this stored in my garage and cabinet since 2017.

The photo of the box is my replacement. DAYTON 2MDX6 Dual Run Capacitor,25/5 MFD,4 3/4.

part #: 2mdx6 prices

• $23.29-$39.27

specifications oelemot:

• brand: Dayton
• mpn: 2mdx6
• shaft diameter: 3/4 In
• rated load: Hp
• current type: Ac
• country of origin: China

payments oelemot:

• credit card: Diners-club
• wallet: Apple-pay
• other

returns oelemot:

• policy: No Returns

shipping oelemot:

• cost: $8.95
• transit: 4-9 Days
• type: Fixed
• carrier: USPS
• service: USPS Ground Advantage
• class: Standard

offer oelemot:

• sold: 0
• started: April 27, 2026
• quantity: 1
• availability: In Stock
• options: Ship-to-home

seller oelemot:

• # reviews: 476
• rating: 99.5%
• city: Yorba Linda, California

general oelemot:

• Industrial Automation Motion Controls > Electric Motors > General Purpose Motors
• condition: Used

Dayton 2MDX6 Is Similar To:

• 22f175 Dayton Motor Run Capacitor Mfd (51.5% similar) ...(April 17th, 2018)
• 2mdt3 Dayton Motor Start Capacitor Mfd (46.9% similar) And free shipping. New Dayton 2MDT3 capacitor 110-125VAC VGA 11...(August 3rd, 2018)
• 31tr73 Dayton Motor Hp Rpm Hz Capacitor Start (41.9% similar) See photos for more details. Great condition. Ty blunt founder. Smoke and pet free house...(June 18th, 2018)
• 3m505j Dayton Hp Pedestal Fan Motor Permanent Split Capacitor Nameplate Rpm (35.6% similar) Designed with integral yoke bracket. 40 degrees c ins. This listing is for a brand new Dayton 3M505J air circulatory motor. Ambient temp. Studs allow fan guard to be mounted directly shaft end shield. Of speeds 2 voltage 115 motor shaft rotation cw cc frame 48YZ enclosure design totally enclosed ...(March 30th, 2019)
• 4103012407 Dayton Capacitor Jetstart Motor Model Teel Pump (37.3% similar) Dayton capacitor jet start motor model no. Mfd QB 5s 1 sch. Please for any questions or concerns. Do not forget about any other charges which are charged by the carrier. 6K580A1 2 HP115 V3450 rpm frame: 56 J60 huzzahs 1INS bearings ball mfg ref reel pump model no. We could possibly save you money on...(September 14th, 2018)
• 4fn97bc Dayton Commercial Duty Air Compressor Motor Capacitor (36.4% similar) Ambient temp. Due to the nature of electrical units I offer a 30 day warranty. All units are tested before shipping. 0MOTOR mounting type rigid base motor thermal protection-stations. 15MOTOR . This is new open box units. Classmate service FACTOR1. Technical duty air compressor motor motor ...(December 27th, 2018)
• 4k781ba Dayton Hp Rpm Dual Shaft Tool Motor Rot (35.5% similar) Dayton 4K781L 1/2 hp 1725 rpm v dual shaft tool motor rot cw cc diameter. 75 in length key way...(July 16th, 2018)
• 4m163a Dayton Rpm Speed Dual Shaft Blower Motor (35.5% similar) Dayton 4M163A 1/8 hp RPM4 speed dual 2 shaft lengths: 7 ring mounts blower motor...(April 24th, 2018)
• 4uhc1 Dayton Motor Dual Run 190735335208 (36% similar) Overall depth, terminal type 1/4 in. Motor dual run capacitor, male quick-connect, 40 degrees to 69 c temp. Overall width , 1-3 4 in. Case height , 5-1 4 in. Overall height , 2-3 4 in. Range, case material aluminum, cover steel, standards culls recognized E136401. 5 micro farad rating, 440VAC ...(November 20th, 2017)
• 4uhc2 Dayton Motor Dual Run 190735335215 (36% similar) Overall depth, terminal type 1/4 in. Range, case material aluminum, cover steel, standards culls recognized E136401. Overall width , 1-3 4 in. Male quick-connect, 40 degrees to 69 c temp. 5 micro farad rating, 440VAC capacitor voltage , 60 50 Hz, oval shape, 4-3 4 in. Case height , 5-1 4 in. ...(November 20th, 2017)
• 4uhc3 Dayton Run Capacitor 55 190735335222 (49% similar) Case height , in. Overall height , in. Motor run capacitor, 55 micro farad rating, 370VAC capacitor voltage , 60 50 Hz, round shape, in. Male quick-connect, 40 degrees to 85 c temp. Overall depth, terminal type 1/4 in. Overall width , in. Range, case material aluminum, cover steel, standards ul ...(November 20th, 2017)