DC-Link Capacitor

This DC-Link Capacitor serves as a high-performance alternative to aluminum electrolytic capacitors and is widely used in DC-link applications across wind power, photovoltaic solar energy, SVG systems, inverters, and other medium to large-scale power conversion systems.

Characteristics

·Efficient suppression of voltage fluctuations:

Piner Electronic's China DC-Link Capacitor adopts an un-sensed winding process, with lower impedance. It can quickly absorb interference current, significantly smooth out the voltage fluctuations of the DC bus, effectively protecting IGBT/MOS tubes from voltage shocks, and ensuring more stable system operation.

·Wide compatibility with various devices:

The voltage range supports 450V to 3000V, capable of withstanding a continuous ripple current of 20A to 200A, and able to withstand a 2-fold instantaneous current shock. It is suitable for a variety of scenarios ranging from small industrial control equipment to large-scale new energy systems.

·Improve overall energy efficiency:

Quick response, high charging and discharging efficiency, can reduce voltage drop, help the entire machine improve energy efficiency by 0.5% - 2%, and save energy and electricity.

·High temperature resistance, long lifespan, no maintenance required:

Using industrial and automotive-grade high-temperature resistant materials, the structure is robust and does not age easily. Under high-temperature and high-vibration conditions, its service life is much longer than that of ordinary capacitors, significantly reducing the maintenance cost in the later stage.

·Safe explosion-proof and flame-retardant performance:

The device is equipped with an internal explosion-proof design. The housing is encapsulated with UL94 V-0 grade flame-retardant material, effectively preventing risks of explosion and fire. Some automotive-grade models also feature anti-reverse connection and over-temperature protection, making them suitable for complex and demanding environments.

· Modular design, supporting high power:

The high-power models can adopt an aluminum shell modular structure, with multiple capacitors connected in parallel, which has a stronger current-carrying capacity. It is specially designed for megawatt-level equipment such as photovoltaic inverters, wind power converters, and energy storage systems.

·Suitable for all working conditions, durable and reliable:

Completely solid-state metallized film structure, no liquid, no leakage, non-polar design compatible with DC circuits, featuring moisture-proof, shock-resistant, corrosion-resistant properties, and suitable for various industrial and outdoor environments.

Technical data

Outline drawing

Technical data sheet

Application Scope

DC-Link capacitors are the core components of all power electronic devices with rectification and inversion circuits, covering all fields such as industrial drives, new energy, power systems, and rail transportation. Typical applications include:

• In the industrial drive field: frequency converters, servo drives, high-frequency power supplies, welding machines, UPS/EPS power supplies, industrial control DC power supplies (DC bus voltage stabilization, ripple absorption)

• In new energy power generation: photovoltaic inverters, wind power converters, DC cabinets for photothermal power generation, energy storage converters for microgrids

• In new energy vehicles: on-board chargers, motor controllers, battery management systems (BMS) for batteries, DC converters

• In the energy storage field: energy storage converters, DC bus of energy storage modules, containerized energy storage systems

• In rail transportation: high-speed rail / metro traction converters, on-board auxiliary power supplies

• In the power system: high-voltage DC screens, reactive power compensation devices, photovoltaic combiner boxes, charging module panels

Company strength

Since its establishment in 2014, Foshan Pin'er Electronics Co., Ltd. has been dedicated to the research and manufacturing of new energy film capacitors, and is committed to providing global customers with reliable and high-performance capacitor solutions. The company adheres to the quality policy of "efficiency, high quality, people-oriented, and continuous improvement", supported by advanced production and testing systems. Pin'er Electronics specializes in film capacitors and industrial capacitors, with its own factory, mainly producing CBB series, safety standard capacitors, and electromagnetic cooker-specific capacitors, etc.

The industries in which our company's industrial capacitors are applied include: new energy and energy storage, automotive electronics and electrification, industrial automation and power supply; the application locations include: inside frequency converters/inverters, on the DC bus (DC-Link), after the primary side rectification and filtering of high-power switching power supplies, on the main DC bus of new energy vehicle electric drive systems, and in the energy storage and release units of industrial welding machines/laser power supplies; the applications under working conditions include: ultra-high ripple current, high DC voltage, and mechanical vibration.

As a core supplier in the DC-Link Capacitor and industrial new energy capacitor fields, we always follow the customer's needs and actively expand the global market. We have established a wide and deep sales network and achieved remarkable results in multiple key areas.

Certificates

Express delivery

Small packages will be sent by courier services such as DHL, UPS, TNT, FedEx, etc. We can also arrange air or sea transportation according to your requirements.

Production workshop and equipment display

FAQ

Q:Are you a manufacturer or a trading company?

A: We are a professional manufacturer with in-house R&D, production lines, and quality control systems. OEM/ODM services are available.

Q:Are your products compliant with international certifications?

A: Yes, our capacitors comply with RoHS and REACH regulations, and test reports are available. Some series are certified to UL and IEC standards.

Q: What payment terms do you accept?

A: We accept T/T, L/C, and flexible terms based on mutual agreement.

Q: How do I select the proper voltage and capacitance for my DC-Link application?

A: We recommend selecting a voltage rating at least 20% above the system’s maximum DC bus voltage. Capacitance depends on ripple current, switching frequency, and allowed voltage ripple. Our engineering team can assist with simulation-based selection upon receiving your circuit parameters.