DCL-50

This natural mineral insulator has outstanding dielectric properties that are ideal for long-life high-stability capacitors with low loss at all frequencies, and high dielectric strength. This type of capacitor is used particularly for high frequency and delay line applications, oscillating circuits, emission devices and calibrators.

Mica dielectric capacitor technology allows for several custom design applications including: 

• High voltage capacitors (up to 50 kV)
• High temperature capacitors (up to 250°C)
• Precision capacitors (up to ± 0.1%)
• High stability capacitors (– 20 + 30 ppm/°C)
• High frequency capacitors ( up to several GHz). 

The majority of these capacitors are manufactured to comply to specifications NF-C-83120;MIL-C-5 and MIL-PRF-39001 standards.

Mica capacitors are noted for the following characteristics:

• Temperature performance
• Low loss at all frequencies
• High dielectric strength
• Stability over time

Silver mica capacitors provide superior stability and low loss when used in RF power circuits that require low pico farad (pF) and nano farad (nF) ranges. Older silver mica capacitors were manufactured in layers of mica and silver, but the layering allowed room for air gaps that reduced the stability and could also create stress fractures in the assembly.

Modern manufacturing uses silver plated to mica layers, eliminating the gaps. When the desired number of layers is obtained, the assembly is coated in an epoxy or ceramic resin. The coating reduces fracturing of the layers and seals the assembly from moisture and particles that could interfere with the capacitance value.

Mica capacitors are useful in circuits for ripple filtering and are often found in time constant, coupling or resonance circuits. In addition to radio circuits, they are used in TV transmitters and Cable TV amplification circuits. Mica is also a superior choice in high-voltage inversion and power conversion for energy absorbing snubber applications with capacitances of up to 10 nF.

Standard silver mica capacitors are normally designed to handle voltages from 100 to 1000 volts. High-voltage RF transmitter applications can call for higher tolerances. Mica capacitors are available for voltages up to 20kV.

Our expert engineering team can create the mica capacitor with the characteristics you require. Send us your drawing or file and we will work with you to manufacture the correct size, lead style and capacitance you desire.

Founded in 1977, Exxelia Alcon Electronics began by manufacturing aluminum electrolytic capacitors for the Indian consumer electronics market. Over time, the company strategically shifted its focus to power electronics and now offers an extensive range of high CV screw terminal aluminum electrolytic capacitors, as well as a wide variety of film capacitors tailored for demanding industrial and technical applications.

Key product lines include:

• IGBT snubber capacitors with direct mounting and multiple terminal styles to suit various IGBT modules,

• DC-Link film capacitors for energy conversion circuits,

• Power film capacitors for resonant applications such as induction heating, wireless power transfer (IPT & WPT), and medical imaging equipment (MRI, CT scanners, defibrillators).

With its broad and evolving product portfolio, Exxelia Alcon Electronics supports a wide range of industries, including:

• AC drive manufacturers,

• UPS and inverter systems,

• wireless EV charging,

• high-frequency induction heating,

• renewable energy,

• telecom equipment,

• and specialized healthcare and industrial applications such as X-ray, welding systems, and pulse magnetizing equipment.

To meet growing domestic and international demand, the company recently completed a major expansion program, which included increasing its production capacity and building a state-of-the-art R&D laboratory. This facility supports the company’s drive for innovation and modernization and aligns with the Indian government’s “Make in India” initiative.

A major strength of Exxelia Alcon Electronics is its expertise in custom-designed capacitors, which account for approximately 50% of total sales. These products are developed based on a deep understanding of customer applications, emerging technologies, and industry-specific needs. Each stage of design and manufacturing is optimized for performance, reliability, and cost-effectiveness, helping customers choose the right capacitor at the best value.

Currently, 35% of the company’s production is exported to over 20 countries, including the USA, Germany, Japan, China, Italy, and South Korea. Following the latest expansion, Exxelia Alcon Electronics aims to raise exports to 50%. To support this goal, its aluminum electrolytic capacitors now carry the CE mark, and its DC-Link capacitors are UL approved. The company is also certified ISO 9001, ISO 14001, and ISO 45001, demonstrating a strong commitment to quality, environmental protection, and occupational safety in accordance with international standards.

Customer responsiveness is at the core of the company’s commercial strategy. With a technically knowledgeable sales team, Exxelia Alcon Electronics works closely with customers to understand their application requirements, analyze technical challenges, and deliver optimized, cost-effective solutions. The company’s distribution network includes 21 partners in India and 21 others across key international locations, ensuring fast and reliable delivery worldwide.

This customer-centric approach has earned Exxelia Alcon Electronics multiple awards for product quality, service, delivery performance, and technological excellence. Notable companies such as GE Healthcare, Emerson Network, and Fuji Electric have recognized the company for its high standards and reliability.

Exxelia Alcon manufactures three types of DC Link capacitors:

• The series designated DCL 23, have a very low equivalent series inductance (ESL). The coaxial construction can give an ESL as low as 11 nH. These features make them suitable for use at high resonant frequency 61 to 460 K Hz. The internal design uses segmented film. This ensures controlled “self healing”. These capacitors can be used in induction heating equipment, resonant power supplies, high ripple current circuits to name only a few.
• The DCL 41 and DCL 50 series are made with metallised polypropylene film and have a maximum voltage rating of 2400 VDC and 1800 VDC respectively. The DCL 41 series are designed for use in UPS systems, wind and solar inverters, traction and industrial drives. The DCL-41and DCL -50 series are ideally suited for impulse discharge applications such as magnetising and welding.