Cornell Dubilier: A Leading Force in Capacitors and Electronics

Introduction
Cornell Dubilier Electronics, Inc. (CDE) is a global leader in capacitors and electronics, serving a wide range of industries including aerospace, energy, medical, and industrial. With over 100 years of experience, CDE is renowned for its innovative products, exceptional quality, and unwavering commitment to customer satisfaction.

Capacitors: A Cornerstone of Electrical Engineering

Capacitors play a crucial role in electronic circuits, storing electrical energy and releasing it when needed. They are essential components in various applications, ranging from power systems to audio equipment. CDE offers a comprehensive portfolio of capacitors designed to meet the diverse needs of modern electronics:

• Film Capacitors: Known for their compact size, low-cost, and high-reliability, film capacitors are ideal for filtering, timing, and coupling applications.
• Electrolytic Capacitors: These high-capacitance capacitors are commonly used in power supplies, filtering, and energy storage.
• Ceramic Capacitors: Ceramic capacitors offer high-frequency performance, low ESR (Equivalent Series Resistance), and excellent stability.
• Supercapacitors: With their ultra-high capacitance, supercapacitors provide exceptional energy storage capacity and long service life.

Advanced Technologies for Emerging Needs

CDE has consistently pushed the boundaries of capacitor technology to address the evolving requirements of modern electronics:

• MLCC (Multilayer Ceramic Capacitors): CDE's MLCCs feature high capacitance in compact form factors, making them ideal for high-density applications.
• High Power Capacitors: Designed for high-power electronics, these capacitors offer rugged construction and withstand high currents and temperatures.
• Electrochemical Double-Layer Capacitors (EDLCs): EDLCs combine high capacitance, low resistance, and extended life, making them suitable for energy storage and power backup applications.
• Polymer Capacitors: These capacitors provide high-capacitance and low-ESR, making them excellent choices for power electronics and filtering.

Certifications and Standards

CDE's unwavering commitment to quality is reflected in its numerous certifications and standards compliance:

• ISO 9001:2015: This certification demonstrates CDE's dedication to maintaining a comprehensive quality management system.
• AS9100D: CDE's aerospace certification highlights its adherence to stringent standards for the aerospace industry.
• IECQ-CECC: CDE's certification under the International Electrotechnical Commission Quality Assessment System (IECQ-CECC) ensures compliance with global standards for electronic components.

Applications in Diverse Industries

CDE's capacitors are widely used in a multitude of industries, serving critical functions:

• Aerospace: High-reliability capacitors for avionics, power systems, and navigation.
• Energy: Energy storage, power conditioning, and distribution in renewable energy systems.
• Medical: High-precision capacitors for medical devices, including diagnostic imaging and patient monitoring.
• Industrial: Automation, motor control, and power factor correction in industrial settings.

Common Mistakes to Avoid in Capacitor Selection

Selecting the right capacitors for your application is essential to ensure optimal performance and reliability. Common mistakes to avoid include:

• Incorrect Voltage Rating: Using capacitors with insufficient voltage ratings can lead to premature failure or even safety hazards.
• Improper Temperature Range: Capacitors must be selected for the operating temperature range of the application. Exceeding the temperature limits can compromise performance and shorten lifespan.
• Overlooking ESR and ESL: Equivalent Series Resistance (ESR) and Equivalent Series Inductance (ESL) can significantly impact circuit performance. Consider these parameters to avoid unwanted effects.
• Ignoring Frequency Considerations: Capacitors have frequency-dependent characteristics. Select capacitors that are suitable for the frequency spectrum of the application.

Step-by-Step Approach to Capacitor Selection

To ensure reliable and efficient capacitor selection, follow these steps:

1. Determine Voltage and Temperature Requirements: Establish the maximum voltage and temperature that the capacitor will be subjected to.
2. Choose Capacitance and Tolerance: Calculate the required capacitance and identify the acceptable tolerance range.
3. 考虑ESR和ESL: 根据应用的要求估计必要的ESR和ESL值。
4. 选择封装和终端: 选择适合空间限制和连接要求的封装和终端类型。
5. Verify Reliability and Quality: Review the capacitor's datasheet and consider certifications to ensure reliability and quality.

Comparing Pros and Cons of Different Capacitor Types

When selecting capacitors, it is important to understand the advantages and disadvantages of different types:

Frequently Asked Questions (FAQs)

1. What is the most critical parameter to consider when selecting a capacitor?
Voltage rating is the most critical parameter to ensure the capacitor can withstand the applied voltage without failure.

2. What is the difference between ESR and ESL?
ESR (Equivalent Series Resistance) represents the internal resistance of the capacitor, while ESL (Equivalent Series Inductance) represents the internal inductance. Both ESR and ESL can affect circuit performance.

3. What are the key applications of supercapacitors?
Supercapacitors are primarily used in energy storage and power backup applications due to their ultra-high capacitance and ability to deliver high currents in short bursts.

4. What certifications should I look for when choosing capacitors for critical applications?
For critical applications, certifications such as ISO 9001:2015, AS9100D, and IECQ-CECC provide assurance of quality and reliability.

5. How can I avoid overvoltage conditions for electrolytic capacitors?
To prevent overvoltage conditions, use resistors or other protective measures to limit the voltage applied to electrolytic capacitors within their rated range.

6. What is the typical lifespan of electrolytic capacitors?
The lifespan of electrolytic capacitors varies depending on the operating conditions, but it typically ranges from 2,000 to 10,000 hours.

7. What are the advantages of using MLCCs?
MLCCs offer high capacitance in compact form factors, low ESR, and stability, making them suitable for high-density applications.

8. How do I ensure the proper orientation of polarized capacitors?
Polarized capacitors have a positive and a negative terminal. Always ensure that the positive terminal is connected to the positive voltage source.

Conclusion

Cornell Dubilier Electronics, Inc. is a trusted partner for capacitors and electronics solutions. With over a century of experience, innovative technologies, and unwavering commitment to quality, CDE delivers exceptional products that empower customers across a wide range of industries. By leveraging CDE's expertise and adhering to best practices in capacitor selection and application, you can achieve optimal performance and reliability in your electronic designs.