High-voltage doorknob capacitor with 60,000-hour design life featuring anti-aging ceramic dielectric and low-loss technology for industrial microwave heating

The cornerstone of 24/7 continuous operation: The long-term reliability of high-voltage door-handle capacitors in industrial microwave heating systems.
Industrial microwave heating equipment is widely used in fields such as ceramic sintering, powder metallurgy, and chemical material processing. Its characteristic requirement for continuous, uninterrupted operation places extreme demands on the durability and thermal stability of core components. As the core of the high-voltage rectification and filtering in the magnetron drive power supply, the reliability of high-voltage door-handle capacitors directly determines the trouble-free operation time of the entire system.

The severe test of continuous operation
In microwave equipment, capacitors are subjected to:

Continuous high-voltage stress: They constantly operate at a DC high voltage close to their rated value.

Significant ripple current: The rectified current ripple causes continuous heating of the capacitor.

High-temperature environment inside the chassis: Heat dissipated by the magnetron and transformer exacerbates the temperature rise of the capacitor.

Thermal failure is the main cause of capacitor lifespan failure.

Our Longevity Gene: Deeply Optimized Materials and Processes
To ensure exceptionally long life under extreme operating conditions, we've implemented comprehensive enhancements:

Anti-Aging Ceramic Dielectric: Utilizing specially stabilized dielectric materials, we significantly suppress aging under high electric field strength, ensuring highly stable capacitance values ​​even after years of operation.

Low-Loss Technology: Optimized electrode materials and sintering processes reduce the loss tangent to industry-leading levels, eliminating self-heating at the root.

Enhanced Heat Dissipation Design: The metal casing not only provides mechanical protection but also acts as an efficient heat sink, quickly dissipating internal heat. Our products are optimized through thermal simulation to ensure minimal hotspot temperatures.

Promise and Verification:
We guarantee a design life of over 60,000 hours for our high-voltage doorknob capacitors at maximum operating temperature and rated voltage. We provide reliability data based on accelerated life testing, giving you complete confidence in your design.

Choosing us means ensuring predictable, long-term, stable operation for your industrial microwave equipment, ensuring your production line never stops.

Xian Xiwuer Electronic & Info. Co., Ltd. is a wholly state-owned company with a registered capital of 91.46 million RMB Yuan, owning a total assets of 315 million RMBYuan, under the jurisdiction of Xi'an State-owned Assets Supervision & Management Committee. There are about 400 employees, with an annual sales income of 250 million RMB Yuan.

The main products include Zinc Oxide Varistors, thermistors, H-V ceramic capacitors, SPD, and Solar Energy Surge Protective Devices. The company has advanced production equipment, including 18 large sintering furnaces, 8 automatic assembly lines, the largest energy impulse current generator and a series of special test equipment and environmental test equipment. In the same industry in China, the company has the largest production capacity and the highest degree of automation with the most complete testing methods.

Our employees are 8 with master's degrees and more than 80 engineers with senior technical titles. 12 technicians have been awarded Experts with Outstanding Contributions by the Xian municipal government, and 1 expert has been enjoying a special allowance from the State Council.

The company has five sites for business production and operation, covering an area of 50,000 square meters. Its construction area is up to more than 54,000 square meters.

· No.99, Fengqing Road, Lianhu District, Xi an(ceramic capacitor)

· No.1118, Ziqaing Road, Xincheng District, Xi' a (Headquarters, varistors, thermistors)

· No.11, Longshou South Road, Lianhu District, Xi' a (Registration, photovoltaic lightning protection box)

· Block A, No.18, Gaoxin Road, High-tech District, Xi' an

· Jinghe New Town Xi Xian New Area(the new plant)

• Xian Xiwuer Electronic and Info. Co., Ltd. is a wholly state-owned company with a registered capital of CNY 101.465 million (exchanged to USD 15.85 million), owning total assets of CNY315 million (traded to USD 49.22 million). It was established in 1976. Currently, it has about 460 employees, with an annual sales income of CN280 million (exchanged to USD43.75 million). The company has four production and business bases covering an area of 43052 square meters, and a construction area of more than 50000 square meters. The company has 8 persons with master's degrees, more than 80 engineers with senior technical titles 12 technicians who have been awarded Experts with Outstanding Contributions by the Xian municipal government, and 1 expert who has been enjoying a special allowance from the State Council.

• The main products include

            • Smart Embedded Epoxy Pole；

            • Integrated Instrument Transformer

• Capacitive Voltage Divider；

• High Voltage Capacitor Rod；

• High Voltage Film Capacitor；

• High Voltage Resistor；

• Primary and Secondary Integrated Intelligent assembly and components with the function of voltage measurement, current measurement, protection, temperature monitoring, and power supply；

• Medium-High Voltage components/parts/ assembly；

• Surge Protective Device for Power Supply System；

• Chips for lightening devices；

• Zinc Oxide Varistor；Thermistor.

Major Customers: ABB, Schneider, GE, ZTE, XD Electric, XJ Electric, PingGao Electric and etc.

• The company has the provincial Technical R&D Center. The company has developing and manufacturing experiences of the key products HV Ceramic Capacitor, SPD, Varistor, Thermistor and for nearly 20 years. There have been 32 patented technologies, 4 invention patents, and 4 national key new products. The company is in the leading position in the same industry. The company has grown very fast with a unique management system which is the fundamental guarantee to the continuous development of the enterprise under the state-owned system. In Northwest China, the company is the first to implement ISO 9001 standards and the first to promote the use of ERP management systems, having achieved ISO9001, ISO14001, and ISO45001 approval, thus standardizing and improving the management level of the company.
• Through continuous technological innovation, product R&D, and quality improvement the main technical performance and reliability of the products are at the internationally advanced level the same level as Panasonic and Siemens. The products have UL, VDE, TUV, CAS, CE, CQC, RoHS, and REACH certifications. The company has advanced production equipment among which the key production equipment and modern assembly lines are imported from Japan, the U.S.A, Germany, Korea, and Belgium including 26m large sintering tunnel furnaces8 automatic assembly lines, the largest energy impulse current generator and a series of special test equipment and environmental test equipment. In the same industry in China, the company has the largest production capacity and the highest degree of automation with the most complete testing methods. The company has two routine test laboratories with the most advanced lightning testing equipment and environmental testing equipment which comply with national standards for laboratory construction. They are the significant laboratories supported by Shaanxi Province with professional testing technicians undertaking part of the supervision and inspection of electronic products in Shaanxi Province at the same time.
• We believe we are able to supply satisfied goods and services to customers at home and abroad with the most reasonable price and the shortest delivery time. on the basis of our excellent quality assurance capacity, technical development capacity, and rich manufacturing experiences.

Through continuous technological innovation, product R&D, and quality improvement, the main technical performance and reliability of the products are at the international advanced level, at the same level as Panasonic and Siemens. The products have UL, VDE, TUV, CAS, CE, CQC, RoHS, and REACH Certification