How many types of high voltage ceramic capacitors can engineer select? Due to multilayer ceramic capacitors technology is keep improving, now manufacturers can make multilayer ceramic capacitors in 7200V with surface mount type. UF Capacitors use to supply to a European customer, who produce laser ruler, which use 6300V multilayer ceramic capacitors. Here is typical example for how high voltage multilayer ceramic capacitors used in circuit. This is circuit of laser ruler’s PCB:
Before multilayer ceramic capacitors, engineer use disc ceramic capacitors CT81 series the most for bypass function. Power meter, Power supplies use CT81 high voltage disc ceramic capacitors often.
UF Capacitors produce both types of high voltage ceramic capacitors, smd high voltage multilayer ceramic capacitors and disc type high voltage ceramic capacitors. Engineers first of all need to decide, to use surface mount type high voltage ceramic capacitors, or radial type disc ceramic capacitors. However, the cost of disc ceramic capacitors are more economic.
High voltage ceramic capacitors play a pivotal role in electronic circuits that require exceptional voltage tolerance. These capacitors are designed to operate effectively in high voltage environments, often exceeding 1kV or even 10kV. Selecting the right high voltage ceramic capacitor is essential to ensure the reliability and functionality of your circuit. To simplify this selection process, here are three key tips to help you choose a suitable high voltage ceramic capacitor model.
1. Capacitance and Tolerance
One of the most critical considerations when selecting a high voltage ceramic capacitor is capacitance. Capacitance is measured in farads (F) and denotes the capacitor's ability to store and release electrical charge. You should select the capacitor's capacity by referring to its specified nominal value. The required capacitance value largely depends on the specific application and circuit requirements.
Additionally, it is essential to pay attention to the tolerance of the high voltage ceramic capacitor. Tolerance signifies the permissible variance from the specified capacitance value. Different applications demand varying levels of precision. For low-frequency coupling circuits, decoupling circuits, and power supply filtering circuits, a tolerance of 5%, 10%, or 20% may suffice. However, for circuits like oscillation circuits, delay circuits, and tone control circuits, a much higher precision in capacitance is essential. In certain applications, such as various filters and networks, even greater precision is required to ensure optimal circuit performance.
2. Withstand Voltage
Withstand voltage, also known as the voltage rating, is a crucial specification when selecting high voltage ceramic capacitors. It represents the maximum voltage a capacitor can endure without breaking down or failing. To ensure the normal and reliable operation of high voltage capacitors, it is vital to select a capacitor with a withstand voltage that exceeds the actual working voltage of your circuit.
As a general rule of thumb, the selected withstand voltage should be more than twice the actual working voltage. This ensures a safety margin and minimizes the risk of capacitor breakdown or failure. Choosing a capacitor with an adequate withstand voltage is essential for the long-term functionality and safety of your electronic circuit.
3. Temperature Coefficient, High-Frequency Characteristics, and Other Parameters
High voltage ceramic capacitors often find application in a variety of circuits, including oscillating circuits, phase-shifting network elements, and filters. To ensure optimal performance in these circuits, it is important to consider additional parameters.
Temperature Coefficient: When selecting high voltage ceramic capacitors for oscillating circuits, it's essential to choose capacitors with a low-temperature coefficient. A low-temperature coefficient ensures that the capacitance remains stable across temperature variations, which is crucial for maintaining circuit performance.
High-Frequency Characteristics: In high-frequency circuits, factors such as inductance, lead inductance, and high-frequency loss can impact the performance of high voltage capacitors. It's advisable to choose capacitors that are specifically designed for high-frequency applications to mitigate these issues and ensure reliable circuit operation.
In conclusion, the selection of high voltage ceramic capacitors is a critical decision in electronic circuit design. The right choice can significantly impact circuit performance and reliability. When in doubt, consult with a professional manufacturer with a proven track record in electronic components.
Topdiode Group UF Capacitors Factory is a reputable manufacturer with over 27 years of experience in the electronic components industry. The company adheres to the ISO 9001:2015 quality management system, ensuring the highest quality standards. Topdiode Group UF Capacitors Factory's safety capacitors, including X capacitors and Y capacitors, have obtained safety certifications from industry authorities, including VDE in Germany, ENEC in the EU, UL in the US, CUL in Canada, KC in Korea, and CQC in China. With a commitment to delivering quality-assured products, professional guidance, and exceptional customer service, Topdiode Group UF Capacitors Factory is a trusted partner for all your electronic component needs. If you're interested in electronic components, don't hesitate to contact Topdiode Group UF Capacitors Factory for top-quality products and expert support.