Custom UPS AC Capacitor

Home / Products / Film Capacitor / AC Filter Capacitor

AC Film Capacitor Suppliers


  • WAC series AC Filter Capacitor for PCB

    Features: Metalized polypropylene film, good self-healing properties, and high reliability Flame-resistant plastic case and epoxy resin sealing, tinned copper terminals

    Read More
  • WAT series AC Filter Capacitor (Axial-Type)

    Features: Sealed with mylar tape or cylindrical plastic case and flame-retardant epoxy resin The installation is flexible and convenient, and the way of extraction can be varied Noninductive structure, ESL low, ESR small, high frequency and high current capacity, temperature low, long life, and othe...

    Read More
  • WAF series Dry Type Single Phase/Three Phase AC Filter Capacitor

    Features: Aluminum housing package, filled with high temperature and high heat-conductive material Copper nut, copper screw extraction, and insulated plastic cover installation is simple and convenient, flame retardant High capacitance, small size, good self-healing property, high voltage proof Larg...

    Read More
  • WAB series Dry Type AC Filter Capacitor for Power Electronics (Steel Case)

    Features: Metal or plastic enclosure package, filled with high-temperature and high heat-conductive material Copper nut or screw bolt lead out, installation is simple and convenient High capacitance, small size, high-pressure level, self-healing Large ripple current, DV/DT bearing capacity

    Read More
  • WAS series Sealed Single/Three Phase AC Filter Capacitor

    Features: Metallized polypropylene film with high performance Cylindrical extruded aluminum case, tightly sealed Optional dry filled, good anti-vibration performance, and no leakage Optional oil filled, less weight, and better heat dissipation performance Low dissipation factor, high pulse current w...

    Read More


ABOUT US

Focused on Electronic Components Manufacturing for 20 Years.

Walson Electronics was established in 2001, with more than 20 years of experience in R&D, manufacturing, sale and service of film capacitors. We are Custom AC Film Capacitor Suppliers and Custom UPS AC Capacitor Manufacturers.

We always adhere to the cooperation of advanced automation and industrialization. the company continues to introduce domestic and foreign outstanding production equipment, while self-developed production management software, enterprise collaborative management to scientific and efficient operation, has achieved 1 billion/annual production capacity breakthrough, and maintains an orderly rise.

Walson Electronics products have covered more industries, including new energy and power industry, Photovoltaic inverters, LED lighting, household appliances and various power sources and other industries.

Adhering to the concept of innovative technology, honest service and professional quality, Walson Electronics pushes forward capacitor products continuously and is sure to become the industry pioneer with innovative advantages.

Contact Us
  • Chairman - Zhenqiu An
    Chairman - Zhenqiu An
  • VP - Andrew An
    VP - Andrew An
  • Salon at Walson
    Salon at Walson
  • Wall of Walson Honors
    Wall of Walson Honors
  • Lobby at Walson
    Lobby at Walson
  • Production Centre Building
    Production Centre Building
  • Production Centre
    Production Centre
  • WALSON
    WALSON
  • Headquarter Office
    Headquarter Office
  • Customer Service Team
    Customer Service Team
  • Product Design
    Product Design
  • Boardroom at Walson
    Boardroom at Walson
  • Salon at Walson
    Salon at Walson
  • Walson Laboratory
    Walson Laboratory
  • Walson Laboratory
    Walson Laboratory
  • Walson Laboratory
    Walson Laboratory
  • Performance Test at Walson Laboratory
    Performance Test at Walson Laboratory
  • Production Equipment
    Production Equipment
Certificate Of Honor
  • VDE-Zertifikat
  • CQC-Bericht zur Sicherheitsprüfung
  • ISO9001-Zertifikat
  • CTI Test Report
  • CTI Test Report
  • CTI Test Report
  • UL Certification
  • CQC Certification
  • CQC Certification
  • UL Certification
  • VDE Certification
  • KC Certification
News
Industry Knowledge

How do AC filter capacitors differ in construction and performance from DC-link capacitors or other types of power capacitors commonly used in inverter applications?

AC filter capacitors and DC-link capacitors, while both used in power electronics, serve different functions and therefore differ in construction and performance in several ways:
Dielectric Material:
AC filter capacitors: Typically use polypropylene (PP) or metallized polypropylene (MPP) dielectric materials optimized for high AC voltage applications. These materials offer high dielectric strength, low dielectric loss, and excellent self-healing properties. DC-link capacitors: Often use polypropylene (PP) or metallized polyethylene terephthalate (PET) dielectric materials suitable for high DC voltage applications. These materials offer high insulation resistance and low dielectric absorption.
Construction:
AC filter capacitors: Constructed to withstand high peak AC voltages and current ripple. They may have segmented metallization or heavy-duty construction to handle the high voltage and current stress.
DC-link capacitors: Designed to handle high DC voltage and ripple current. They may have compact cylindrical or box-like designs optimized for high energy storage and low equivalent series resistance (ESR).
Voltage Rating:
AC filter capacitors: Typically have higher AC voltage ratings to withstand peak voltage levels in AC circuits. They are rated in terms of RMS (root mean square) voltage. DC-link capacitors: Designed for high DC voltage applications and rated based on their DC voltage handling capabilities.
Capacitance and Ripple Current:
AC filter capacitors: Selected based on capacitance value and ripple current handling capability to effectively filter out AC noise and harmonics. They are optimized for low impedance at the fundamental frequency and high impedance at harmonic frequencies.
DC-link capacitors: Chosen based on capacitance value and ripple current rating to store and smooth out DC voltage. They are optimized for low ESR and high ripple current handling to minimize voltage ripple in DC circuits.

What thermal management techniques are employed to ensure proper heat dissipation and temperature stability in AC filter capacitors operating under high-power conditions?

Proper thermal management is crucial for AC filter capacitors operating under high-power conditions to ensure optimal performance and reliability. Several techniques are employed to manage heat effectively:
Selection of High-Temperature Materials: Using materials with high thermal conductivity and temperature resistance for the capacitor construction can enhance heat dissipation and improve temperature stability. For example, using metalized film with high thermal conductivity can help spread heat more efficiently within the capacitor.
Optimized Capacitor Design: Designing the capacitor with features such as increased surface area or fins can enhance heat dissipation. This can involve optimizing the capacitor's shape, size, and internal structure to maximize airflow and facilitate heat transfer.
Cooling Systems: Implementing active or passive cooling systems, such as fans, heat sinks, or thermal pads, can help dissipate heat generated during capacitor operation. These cooling systems can be integrated into the capacitor assembly or the surrounding electronic system to maintain optimal operating temperatures.
Placement and Mounting: Proper placement and mounting of AC filter capacitors within the electronic system can also affect thermal management. Placing capacitors in locations with good airflow and minimal heat buildup can help dissipate heat more effectively.
Additionally, using thermal interface materials between the capacitor and mounting surface can improve heat transfer.
Message Feedback