AUDYN Q4-68.0-400 Cap Mkp Foil Capacitor 844632099984 Q4/68.0/400 68UF 400V

( Brand: Audyn ), ( Manufacturer Part Number: Q4/68.0/400 ), ( Part Type: Cap Capacitor ), ( Compatible Brand: Universal ), ( Country Of Origin: China ), ( UPC: 844632099984 )

Review AUDYN Q4/68.0/400 Cap Q4 68uf 400v Mkp Foil Capacitor

The **Audyn Q4 68 F/400V MKP Film Capacitor (Q4/68.0/400 CAP)** is a high-performance, metalized polypropylene (MKP) capacitor engineered for demanding applications where reliability, longevity, and precision are paramount. Designed with a robust **Q4-grade polypropylene film**, this capacitor delivers exceptional stability, low loss, and superior temperature resistance, making it ideal for power supply filtering, signal coupling, and EMI/RFI suppression in both industrial and consumer electronics. Its **68 microfarad capacitance** provides ample energy storage for smoothing voltage fluctuations, while the **400V DC working voltage** ensures robust operation in high-voltage circuits, including inverters, motor drives, and switching regulators where transient spikes and voltage surges are common. The **metalized foil construction** enhances durability by self-healing minor dielectric damage, extending the capacitor s operational lifespan even under stress conditions. With a **low equivalent series resistance (ESR)** and **low equivalent series inductance (ESL)**, this capacitor minimizes energy dissipation and signal distortion, making it particularly well-suited for high-frequency applications where efficiency is critical. Its compact yet sturdy **axial lead design** facilitates easy integration into printed circuit boards (PCBs), while the **high-temperature tolerance** (typically up to 105 C) ensures consistent performance in demanding thermal environments. Whether used in automotive electronics, renewable energy systems, or precision instrumentation, the Audyn Q4 series exemplifies engineering excellence, combining durability with performance to meet the most exacting electrical engineering challenges.

### **Pros and Cons of buying a Audyn Q4 (68 F, 400V, MKP Foil Capacitor)**

1. **High-Quality Construction** Audyn is a reputable brand known for manufacturing reliable capacitors, especially for audio and power applications. The Q4 series is designed with high-grade materials, including MKP (metallized polypropylene) foil, which offers excellent stability and longevity.

2. **Low Impedance and Low ESR** MKP foil capacitors generally exhibit low equivalent series resistance (ESR) and low inductance, making them ideal for high-frequency applications such as audio amplification, filtering, and smoothing in power supplies. This reduces energy loss and improves efficiency.

3. **Wide Temperature Range** These capacitors are designed to operate reliably across a broad temperature spectrum, typically from -40 C to 105 C, making them suitable for both indoor and outdoor applications.

4. **Long Lifespan** MKP foil capacitors are known for their durability and resistance to degradation over time, especially when compared to electrolytic capacitors, which can dry out or leak.

5. **High Ripple Current Rating** The 400V rating and 68 F capacitance provide a robust ability to handle ripple currents in power supply applications, reducing the need for additional filtering components.

6. **Reliability in Audio Applications** For audio equipment (e.g., amplifiers, preamps), MKP capacitors are preferred over electrolytics because they do not degrade audio quality due to leakage current or phase shift.

7. **Compact and Lightweight** Foil capacitors are generally smaller and lighter than their electrolytic counterparts for the same capacitance and voltage rating, making them easier to install in tight spaces.

8. **Low Leakage Current** Unlike electrolytic capacitors, MKP foil capacitors do not suffer from high leakage current, which can be problematic in sensitive circuits.

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1. **Higher Cost** MKP foil capacitors are more expensive than standard electrolytic or ceramic capacitors, which may be a drawback for budget-conscious projects.

2. **Limited Availability** While Audyn is a well-known brand, finding these specific capacitors in stock may require ordering from specialty suppliers rather than general electronics stores.

3. **Sensitivity to Overvoltage** While rated for 400V, exceeding this voltage even temporarily can cause failure. Unlike electrolytics, which may fail catastrophically, MKP foil capacitors may degrade silently over time if stressed.

4. **Not Ideal for High-Current DC Link Applications** While suitable for filtering, they are not typically used as bulk energy storage capacitors (e.g., in inverter circuits) due to their lower dielectric strength compared to some electrolytic types.

5. **Soldering Challenges** Foil capacitors can be more delicate during soldering than electrolytics, requiring careful handling to avoid damage to the metallization.

6. **Limited Capacitance Options** The 68 F rating may not be the best choice for all applications. Smaller values (e.g., 10 F 47 F) are often preferred for audio coupling and decoupling, while larger values (e.g., 100 F ) are better for power smoothing.

7. **Not Polarized** While MKP foil capacitors are non-polarized, improper wiring (e.g., reverse polarity in a circuit expecting it) is not an issue, but they are still best used in their intended orientation for optimal performance.

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The **Audyn Q4 (68 F, 400V, MKP Foil Capacitor)** is an excellent choice for applications requiring **high reliability, low impedance, and long-term stability**, particularly in **audio amplification, power supply filtering, and sensitive electronic circuits**. Its superior performance over electrolytic capacitors in terms of lifespan, leakage current, and frequency response justifies its higher cost for demanding applications.

However, if **cost is a major concern** or if the application does not require the benefits of MKP foil (e.g., a simple DC power supply where electrolytics suffice), a standard electrolytic or ceramic capacitor may be a more economical alternative. Additionally, if the capacitance value (68 F) is not optimal for the specific circuit, other values or types may be more suitable.

- You are working on **audio equipment** (amplifiers, preamps, speakers).

- You need **low ESR/inductance** for high-frequency filtering (e.g., in power supplies for sensitive electronics).

- You require **long-term reliability** and **low leakage current**.

- Your budget allows for **premium components** that enhance performance and longevity.

- You are on a **tight budget** and electrolytic or ceramic capacitors will suffice.

- The application does not demand the **low impedance** of MKP foil (e.g., simple DC smoothing where a 100 F electrolytic would work).

- You need **higher capacitance values** (e.g., for bulk energy storage in inverters or motor drives).

For most **high-end audio and precision electronics projects**, this capacitor is a **strong recommendation** due to its proven performance and durability. For general-purpose or cost-sensitive applications, weigh the trade-offs carefully.

Details:

Low loss of 0.0003% 1 kHz/20 C. 400 VDC voltage rating. Only used for a few hours, Audyn Cap Q4 68uF 400V MKP Foil Capacitor, Key Features: Features tightly wound metabolized polypropylene foil. Designed for super-low micro phonics.

Precision made in Germany with 5% tolerance.

part #: q4680400 prices

• $28.95-$34.36

specifications speakerpartgo:

• brand: Audyn
• mpn: Q4/68.0/400
• part type: Cap Capacitor
• compatible brand: Universal
• country of origin: China
• upc: 844632099984

seller speakerpartgo:

• rating: 100.0%
• city: Saint Charles, Illinois
• # reviews: 1324

shipping speakerpartgo:

• type: Calculated
• class: Standard
• cost: $6.87
• service: USPS Ground Advantage
• carrier: USPS
• transit: 2-5 Days

offer speakerpartgo:

• started: March 18, 2026
• quantity: 1
• sold: 0
• availability: In Stock
• options: Ship-to-home
• best offers: True

returns speakerpartgo:

• policy: No Returns

payments speakerpartgo:

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general speakerpartgo:

• condition: Used
• TV, Video Audio Parts > Speaker Parts Components > Electronic Parts Components

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