WD Capacitors Low Impedance for Frequency Converters

Overview of WD Low Impedance Capacitors

WD low impedance capacitors are aluminum electrolytic capacitors specifically designed for frequency converter systems. These components feature extremely low impedance at high frequencies, compact case sizes, and stable performance across a wide temperature range. They are engineered to meet the demands of industrial applications where consistent power conversion and long operational life are required.

Key Performance Characteristics of WD Low Impedance Capacitors

Extremely Low Impedance at High Frequencies

These capacitors deliver reduced impedance at high operating frequencies, which helps minimize ripple current and voltage fluctuations in frequency converter circuits. This characteristic contributes to stable power output and reduced heat generation during continuous operation.

Wide Operating Temperature Range

The capacitors function within a temperature range of -55℃ to +105℃, making them suitable for deployment in both low-temperature industrial environments and high-heat equipment enclosures. Their low-temperature impedance characteristics remain consistent across different voltage ratings.

Extended Load Life Under Harsh Conditions

When operated at 105℃ with rated voltage applied, the capacitors withstand 5000 hours of load life. For smaller case sizes, ø5, ø6.3 and ø8 models have a 2000-hour load life, while ø10 models have a 3000-hour load life. After the rated load life period, leakage current remains below specified values, capacitance changes within ±20% of the initial value, and dissipation factor remains below 200% of the specified value.

Compact Case Sizes

The capacitors are available in smaller case sizes compared to standard alternatives, allowing for more efficient use of printed circuit board (PCB) space in compact industrial equipment designs.

Detailed Technical Specifications

Industrial Applications for WD Frequency Converter Capacitors

Power Conversion Systems

These capacitors are suitable for use in frequency converters, switching power supplies, and industrial uninterruptible power supply (UPS) systems, where they support stable power conversion and voltage regulation.

Industrial Automation Equipment

They are used in stepping servo controllers and AC servo systems for sewing equipment, with established use in products from multiple leading manufacturers in the automation sector.

Health Equipment Controllers

The capacitors are deployed in health equipment control systems, where they account for more than 70% of the market share in this segment. They are used as designated components for several international and domestic brands.

Manufacturing and Quality Assurance

Production Capabilities and Technologies

The manufacturer was established in 2001 and operates production facilities in Suzhou and Anhui. It holds 2 patented technologies and 8 copyrights for production control software. Mass-produced products with a working voltage of 600V are domestically leading. Production processes utilize high-precision automatic equipment.

International Compliance and Certifications

All WD low impedance capacitors conform to EU standards and have passed CE and CB testing certifications, ensuring compatibility with global commercial procurement requirements.

	Core Technologies The company possesses 2 patented technologies and 8 copyrights for production control software. The products with a working voltage of 600V that are mass-produced are domestically leading. Product Standards The products meet the EU standards and have passed the CE and CB testing certifications.
	History of Development In 2001, the enterprise was established in Beijing. In 2007, the Suzhou branch was established, and in the same year, the production plant was relocated to Suzhou. In 2011, the construction of the Anhui factory was initiated. By the end of 2012, the Anhui factory was officially put into production. In May 2013, the core production equipment was updated, with a cumulative investment of RMB 15 million in the equipment.
	Cooperative Customers For stepping servo controllers: Shenzhen Leadshine, Beijing HollySys, Start and others. For AC servo systems of sewing equipment: Baumax, Supu, Hengqiang, Wolong. In the field of health equipment controllers, UUcap capacitors account for more than 70% of the market share. The company is the designated supplier for brands such as Icon (USA), Shuhua, and Oma. Customers in industries such as industrial UPS, switching power supplies, and frequency converters. A.O. Smith, Technology Development Company of Tsinghua University.

FAQ

What is the operating temperature range of these capacitors?

These capacitors operate within a temperature range of -55℃ to +105℃, covering most industrial operating environments.

How long is the load life of WD low impedance capacitors?

Most models withstand 5000 hours of load life at 105℃ with rated voltage applied. ø5, ø6.3 and ø8 models have a 2000-hour load life, while ø10 models have a 3000-hour load life.

What certifications do these capacitors hold?

The products conform to EU standards and have obtained CE and CB testing certifications.

What are the standard pin spacing and lead dimensions?

Pin spacing (P) ranges from 2.0mm to 7.5mm, and lead diameter (ød) ranges from 0.5mm to 0.8mm, depending on the case diameter. Specific dimensions are listed in the mechanical dimensions table above.

For commercial procurement inquiries, sample requests, or custom specification requirements, please contact our sales team for detailed information and pricing.