The MMKP82 capacitor was first developed by Faratronic Co., Ltd., a leading company in the field of thin film capacitors in China. It belongs to the C82 series and C84 series of metal film capacitors within the category of polypropylene film capacitors. Its full name is "Plastic Encased Double-sided Metallized Polypropylene Film Capacitor." The designation "MMKP82" reveals its material composition: "MKP" indicates metallized polypropylene film material, with an additional "M" signifying an extra layer of metal coating on both sides of the polypropylene film. The "82" distinguishes it from the CBB81 high-voltage metallized polypropylene film/foil capacitor. MMKP82 capacitors are an upgraded version of CBB81. representing a higher level of performance.
The internal structure of MMKP82 capacitors is unique. While conventional CBB capacitors use single-sided vapor-deposited film, MMKP82 capacitors are made of double-sided vapor-deposited metallized polypropylene film combined with optical film winding. The capacitor uses polypropylene thin film as the dielectric material, with high-temperature-resistant double-sided metallized polyester film as the electrode. It features a non-inductive structure with gold spray on both ends and is unidirectionally lead-out. The lead-out wires are tin-plated copper wires (CU wires), and the capacitor is encapsulated in flame-retardant epoxy resin.
Key Features of MMKP82 Capacitors:
Excellent self-healing properties
Low high-frequency losses
Low temperature rise
High tolerance to high impact
High voltage tolerance
Ability to withstand large currents
Stable capacitance
Primary Applications of MMKP82 Capacitors:
MMKP82 capacitors are commonly referred to as power resonant capacitors because of their frequent use in power circuits, particularly in high-voltage, high-frequency pulse circuits. They find applications in resonant circuits in inverters, efficient circuits in LED drivers, efficient circuits in switch-mode power supplies, and absorption and SCR rectifier circuits.
Production of MMKP82 capacitors is challenging due to the specialized materials used and the complexity of the manufacturing process. The high level of technical expertise required from production personnel makes producing high-quality MMKP82 capacitors difficult.
To assess the quality of MMKP82 capacitors, various methods can be employed:
Aging Tests: Prolonged aging tests, such as continuous aging for several months, followed by capacitance measurement, can help identify the quality of MMKP82 capacitors.
Breakdown Voltage Testing: MMKP82 capacitors can endure continuous application of direct current voltage until breakdown occurs, allowing measurement of the actual breakdown voltage, which should be 2 to 3 times the rated working voltage for high-quality MMKP82 capacitors.
Dissipation Factor Measurement: Specialized digital bridges designed for capacitors can measure the dissipation factor of MMKP82 capacitors. Lower dissipation factor values indicate higher quality.
Visual Inspection: Examine the external appearance of the capacitor to ensure there are no obvious damages, leaks, or physical harm.
Capacitance Testing: Use suitable instruments such as an LCR (Inductance, Capacitance, Resistance) meter to test whether the capacitance of the capacitor falls within the specified range. The specified capacitance values for MMKP82 can be found in its datasheet or specifications
ESR (Equivalent Series Resistance) Testing: Use an ESR meter (Equivalent Series Resistance meter) to measure the capacitor's ESR value. ESR value reflects the internal losses of the capacitor to some extent; excessively high ESR values could suggest capacitor damage.
Withstand Voltage Testing: Assess the capacitor's ability to withstand voltage, ensuring it does not leak or break down under normal operating voltage.
Temperature Testing: Evaluate the capacitor's performance under appropriate temperature conditions. Certain capacitors might experience performance degradation at high temperatures; therefore, temperature testing helps determine their stability under different environmental conditions.
Manufacturing MMKP82 capacitors is challenging due to the high technical requirements and complexity of the production process. When selecting suppliers, it is essential to choose reputable and experienced companies in the industry. For example UF Capacitors，an ISO9001-certified manufacturer in China, founded in 1995. We hold military qualifications for tantalum capacitors, MLCC, and other products. Additionally, we have a UL-recognized test laboratory located at our factory site.
Our marketing position is to provide a superior alternative to first-tier brands such as TDK, Murata, AVX, EPCOS, Vishay, and Panasonic. We offer similar quality but at better prices, with faster lead times and excellent service. With extensive experience working with renowned international companies like GE, Philips, Jabil, and Flex, we have built a strong reputation.
UF Capacitors serves the consumer electronics, computing, communications, and industrial markets. As a professional Chinese electronic components manufacturer, we are dedicated to delivering high-quality electronic components, exceptional management, strict quality control systems, and excellent sales service. We strive to foster mutually beneficial partnerships and drive business growth.