Capacitors

The capacitor terminations are generally protected by a nickel barrier formed by electrolytic deposit. This barrier gives chip capacitors leaching performance far exceeding the requirements of all applicable standards. The nickel barrier guarantees a minimum resistance to soldering heat for a period of 1 minute at 260°C in a tin-lead (60/40) or tin-lead-silver (62/36/2) bath without noticeable alteration to the solderability. It also allows repeated soldering-unsoldering and the longer soldering times required by reflow techniques.

However nickel barrier amplifies thermal shock and is not recommended for chip sizes equal or greater than CNC Y (30 30) - (C 282 to C 288 - CNC 80 to CNC 94).

MIL-qualified capacitors meet stringent military specifications (e.g., MIL-PRF and MIL-STD standards) ensuring high reliability, durability, and performance in critical applications like aerospace, defense, and industrial electronics.

Excellent temperature resistance, high volume/capacitance ratio, electrical properties and reliability make Exxelia's ceramic capacitors ideal for a wide range of fields of application including medical implants, aircraft flight controls, switched-mode power supply in harsh environments, core samplers for petroleum exploration, and space vehicles. Exxelia also offers Hyper Frequency ceramic capacitors with optimized size and very low ESR. 

These HiQ capacitors offer excellent performance levels for RF applications requiring functional reliability. Typically these applications include civil and military telecommunications (cellular base station equipment, wireless broadband service, Point to-Point or Multipoint radios, radio broadcasting equipment), and MRI coils.

Exxelia manufactures its MIL-qualified capacitors in accordance with all relevant military specifications. Capacitors are tested, marked, and validated to meet operational parameters outlined in MIL standards such as MIL-PRF-39006 and MIL-PRF-55514.

The MML capacitors feature:

• Non-Inductive Stacked Metallized Polymer Film: Ensures high performance and reliability.
• Encapsulation: Encapsulated in a flame-retardant high-temperature epoxy resin or molded diallyl phthalate (DAP) housing for mechanical and environmental protection.

Exxelia offers capacitors with established reliability, achieving failure rates as low as 0.001% per 1,000 hours (S level) at a 90% confidence level. Other available levels include M (1%), P (0.1%), and R (0.01%).

The MML Series includes several types:

• D Series (bus bars integrated for power electronic conversion or filtering)
• M Series (Small package with radial, DIL or SMD connections)
• C Series (Flat package with DIL connections)
• Custom solution with specific casing and connections to optimize the integration, the heat management and some electrical characteristics.

Each type offers various configurations to suit different applications.

Exxelia's MIL-qualified capacitors comply with key specifications such as:

• MIL-PRF-39006: Wet tantalum capacitors for high-reliability applications.
• MIL-PRF-55514: Film capacitors for DC and AC circuits.
• MIL-PRF-83421: Metallized plastic film capacitors.

Exxelia's MML Series capacitors boast several key features:

• High Energy Density and High Temperature Capability: Operates effectively up to 140°C.
• Size and Weight Reduction: Up to 50% reduction compared to traditional film technologies and up to 10 times lighers comparing to the ceramic capacitors.
• Stable Performance: Maintains consistent performance across a wide temperature and voltage range.
• Open circuit defect mode with self healing advantage
• Rugged and Lightweight Construction: Ideal for demanding applications.
• Self-Healing Properties: Ensures long-term reliability and safety.

MIL-qualified capacitors guarantee:

• Resistance to extreme conditions (temperature, vibration, humidity).
• Long operational life and low failure rates.
• Strict quality assurance processes validated by military standards.

General Electrical Specifications:

• Capacitance Range: From 1µF to 2 000µF depending on the series.
• Voltage Range: From 50V to 2000V DC.
• Operating Temperature: From -55°C to +140°C, with some derating above 125°C.
• Dissipation Factor (Tg d): Typically 60 . 10^-4
• Insulation Resistance: Minimum of 10,000 MΩ-µF at rat ed voltage and 25°C.
• Current: few Amps to hundreds of Amps (according to  the capacitor construction)

MIL specifications are publicly accessible via government websites like www.dla.mil/Land-and-Maritime 

Exxelia also provides guidance to help you select the right components for your projects.

MML Series capacitors are suitable for aerospace & defense: withstand harsh environments and high reliability requirements.

• Inverter
• DC-Link
• Rectifier
• Energy storage

These capacitors are ideal for industries requiring high reliability, such as:

• Aerospace and aviation
• Defense and military equipment
• High-performance industrial electronics

Yes, Exxelia offers custom configurations and extended/intermediate values upon request. This flexibility allows for tailored solutions to meet specific application requirements and could help your design with easiest integration, cost saving, thermal management optimization, sensors or filter integrations etc...

MML capacitors are tested to meet various environmental and durability standards:

• Humidity (Steady-State): MIL-STD-202 Method 103.
• Barometric Pressure (Reduced): MIL-STD-202 Method 105.
• Thermal Shock: MIL-STD-202 Method 107.
• Life Test (Elevated Ambient Temperature): MIL-STD-202 Method 108.

Exxelia has a long history providing high temperature capacitors to various industries. Several dielectrics, such as plastic (PTFE; PI; & PEI), reconstituted mica, aluminum electrolytic, tantalum and ceramic are used for manufacturing high temperature capacitors. Many are impregnated with solid thermo-setting resins such as epoxy, polyester or silicone.

These technologies provide very high stability of mechanical and electrical characteristics with temperature capabilities of -55°C to as high as +230°C, depending on the dielectric technology, and some do not require voltage de-rating. Rated voltages span from 30 VDC to as high as 60,000 VDC with capacitance ranges 100pF to 30µF.

Plastics come in such a wide range that they can cater to most of our technical needs. They can be used in high-temperature applications (Teflon), power (polypropylene), energy conversion (polyester), and for functions requiring high stability (polycarbonate). 

The product range extends from capacitor outputs for implementation on printed circuits, to metal housings with terminal output for power capacitors in wired circuits. Surface mounted devices (SMD) and film capacitors withstanding high temperatures are also manufactured.

Our multilayer ceramic capacitor (MLCC) is a chip capacitor manufactured with layers of ceramic material and metal. The alternating layers can be built up to the desired capacitance range. The dielectric thickness determines the voltage rating. The capacitance is determined by multiplying the number of layers by the amount of active area and then the dielectric constant for the material. This number is then divided by the dielectric thickness. The active area is the overlap between the electrodes.

A capacitor with a thicker dielectric layer handles higher voltages than one with a thinner layer. Inversely, the thinner dielectric will have a higher capacitance rating. The MLCC design provides a significant space-saving advantage over other capacitor styles.

High temperature ceramic capacitors and high temperature mica capacitors are often used in situations that require a higher voltage or a higher power than normal. Because of the ways in which they are built, they can offer low ESR and excellent inrush current and ripple capabilities that other types of capacitors cannot. The only downside is that they tend to be physically larger than other types of capacitors.

The automotive industry is another area where high temperature capacitors are required. The temperature conditions can vary dramatically depending on what area of a car you’re talking about. The brake systems, the engine and the transmission are often the most temperature intensive areas.

Ceramic chips are created with binders and solvents added to a specified ceramic powder. The slurry created is dried, forming a sheet or tape of ceramic material. Metal powder is mixed with solvents and additional ceramic material to create a liquid electrode. The liquid is then printed onto the ceramic layer. Layers of the ceramic sheets are stacked and laminated to form a solid structure.

The solid structure is cut into the desired size. Once cutting is complete, the assembly must be kiln fired. The temperature used in the firing process is critical in determining the capacitor’s characteristics. The process is similar for disc and chip styles. Disc capacitors use long leads to mount through circuit boards. Chips use surface mount technology.

High temperature tantalum products are designed for use in situations where you might be using down-hoe drilling equipment, for example. They are ideal for this type of input and output due to their capabilities for high ripple current. They have also been known to have the additional benefit of current values that offer lower leakage compared to other types of capacitor technologies.

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.

Our high voltage capacitors are specifically designed to be able to withstand a larger amount of electrical charge than other types of capacitors can offer. They use two main mechanisms to store the energy that is being transmitted, which is contrary to the conventional dielectric method that is used with other types of capacitors. The first main method used to store electricity is called double layer capacitance, while the second is called pseudo capacitance. These methods are electrostatic and electrochemical in origin, respectively, which allows high voltage capacitors to combine the energy storing methods of normal capacitors with the methods used during the operation of a normal battery.

Our film capacitor are very specific types of capacitor that uses a thin plastic film as a dielectric element in the configuration. The thin plastic film is made using a technologically advanced film drawing process. Depending on how the capacitor needs to operate when it is finally configured, the thin material may be either left untreated or metalized after the manufacturing process. 

Once the film material has been added, electrodes are placed into the assembly, which is mounted into a case that is designed to protect the capacitor from a wide variety of different environmental factors. Due to the fact that they are incredibly stable, do not cost a significant amount of money to manufacture and have a low rate of inductance, they are being used in many different types of applications. Buyer beware, there are many different types of capacitors on the Internet that qualify as film capacitors that just change the type of material being used as the dielectric. 

Our high-quality polymer film capacitors, plastic film capacitors, power film capacitors and more are readily available to meet your needs. The specific type of material that will be used during the creation of the capacitor will vary depending on what the device will end up being used for. Let us know how we can help in meeting your needs and exceeding your expectations.

These capacitors offer a very high charge per unit of volume, a long lifetime and a high reliability. They are used in consumer goods and more specialized niches including space vehicles, aircraft electronics, weapons and rail transport. Exxelia develops both solid and wet tantalum capacitors.

A tantalum capacitor is a specific type of electrolytic capacitor. It is made from a metal called tantalum, which is where it gets its name. Tantalum acts as an anode. The capacitor itself is covered in a thin layer of oxide, which allows it to act as the dielectric. It is surrounded by a conductive cathode. One of the major benefits of tantalum capacitors is that their design allows for a very thin layer of dielectric, which allows for higher capacitance than other types of capacitors made from different types of materials. These types of capacitors are generally polarized, which means that in practice they can only be connected to a direct current power supply that has been designed while observing the appropriate terminal polarity. They have excellent stability over time and superior frequency characteristics when compared to different types of similar capacitors that are made from different materials.

Exxelia’s film capacitor product lines include a wide array of custom designs using state of the art technologies combined with the latest developments in dielectric films (including polyester, polypropylene, PPS, and teflon). Kraft/paper, foil capacitor, and metallized film capacitor products are available. This allows Exxelia to provide high temperature capability; high voltage ratings; precision capacitors with ± ¼% tolerances, and exceptional performance in harsh environments. Military film capacitors are tested and qualified to military standards, with more than 30 military qualified products. Film capacitors are exceptional for pulse/storage, DC link, energy discharge, and custom applications.

A wide selection of packaging designs are available such as film-wrapped, pre-molded epoxy cases, and hermetically sealed metal cases. Exxelia continues to research and develop film caps with new methods in capacitor manufacturing to provide durable designs and packaging schemes for special environmental use.

Film capacitors are used in a wide variety of different industry, including with military technology and applications as well as the aerospace industry. This is mainly due to the fact that they have high long term stability, can be produced relatively cheaply and are heat resistant. 

One of the main characteristics of our film capacitor comes from the fact that they are not polarized. Due to this design element, they are available for use in both AC power and signal applications. 

They are also designed to have high precision capacitance values, which means that they can retain their value for a much longer period of time than capacitors of other types. The aging process of these types of capacitors is generally much slower than it would be if a different type of material were being used during construction.

For safety purposes, these types of capacitors need to be forward biased in their configuration. This is mainly due to the characteristics of the electrolyte that has been used in their construction. The positive terminal always needs to have a larger amount of voltage than that of the negative terminal. If the situation were reversed and the negative terminal suddenly had a higher voltage than the positive terminal (which is also referred to as reversing the voltage polarity), the aluminum material that is used as the dielectric could short circuit and become damaged. It could also overheat, which could cause a substantial leak. 

The capacitor could also vaporize, which could cause the entire enclosure to burst under the right circumstances. It is important to note, however, that this phenomenon is very rare.

A Class 1 ceramic capacitor is the best choice for applications that demand low losses and high stability. This style provides a reliable capacitance within the designated range of frequency, temperature and voltage. Class 2 series offer higher capacitance, but have wider fluctuations. The thermal stability varies by +/- 15 percent; these should be used in applications that do not require a continual exact capacitance. Exxelia uses NPO and P100 as Class 1 dielectrics ; and BX, 2C1 and X7R as Class 2 dielectrics.

Class 1 feedthrough capacitors offer high frequency noise reduction, and are excellent for use in microwave transmission, medical applications and DC supply and signal lines. Feedthrough design uses an axial-style lead for connections.

Aluminum electrolytic capacitors, also commonly known as just electrolytic capacitors, are a unique type of configuration that uses an electrolyte to achieve a capacitance that is much larger than other types of these devices. The electrolyte in question is usually either a gel or a liquid that itself contains a very high concentration of polarized ions. Polarization indicates that the voltage on the positive terminal is always larger than the similar voltage on the negative terminal of the capacitor.

One of the major benefits of these types of aluminum electrolytic capacitors is the aforementioned large capacitance. They do, however, have a number of disadvantages when compared to other types of capacitors. Aluminum electrolytic capacitors have a large leakage current when compared to capacitors of other types. Additional disadvantages include a limited lifetime, value tolerances and an equivalent resistance series.

High voltage capacitors can be made from a few different types of material. High voltage ceramics capacitors and metalized polyester film capacitors are just two of the main types. They are notable for a few different characteristics:

Charge time – Even though different types of technology are at work with regards to the way high voltage types of capacitors operate, they still have both discharge and charge times that are very comparable to those of regular capacitors. These charge times are possible due to the low internal resistance in the materials at play.

Specific power – Another main characteristic that sets these types of capacitors apart is specific power, which means that they have a specific power of up to ten times larger than regular batteries.

Cycle life and safety – High voltage capacitors are much safer than traditional capacitors and batteries, even when they’re being mistreated. A traditional battery, for example, has been known to fully explode if it is short circuited, experiences excessive heat or is involved in other types of situations.

Unlimited charging – High voltage capacitors can also be charged and discharged a virtually unlimited number of times. Traditional capacitors and batteries can only be charged around 500 times before they start to lose some of their original power.

Because of these reasons, high voltage capacitors made from all types of materials are very useful during situations where energy needs to be stored and released on a frequent basis.

The main goal of high temperature capacitors is to allow for stable performance of electrical equipment at high temperatures. They are also involved heavily in applications that require a high level of reliability. Though there are a wide variety of different capacitors and types of technologies that are available depending on the needs of the situation, only a few are available that can operate in a reliable way once temperatures become elevated. 

High temperature capacitors made out of materials like ceramic or tantalum are usually employed when an application begins to operate at a temperature near or above 350 degrees Fahrenheit.

Exxelia is certified EN 9100, a quality standard specific to the aerospace, space, and defense sectors. Our facilities are also ISO 9001 certified (quality management), and some are certified ISO 13485 for medical devices. Other industry-specific standards, such as NADCAP or AQAP, may also apply depending on the products and markets.

The EN 9100 standard ensures a rigorous quality management system tailored to the critical requirements of the aerospace, space, and defense industries. It is required by major OEMs such as Airbus, Safran, Thales, or CNES. This certification guarantees product traceability, risk management, and compliance with international standards.

Yes, some of our facilities are ISO 13485 certified, the quality standard for medical devices. This certification enables Exxelia to design and manufacture components (such as coils, sensors, or capacitors) used in high-reliability medical equipment, including MRI scanners, ventilators, and imaging systems.

The railway industry demands durability, reliability, and long service life. While a dedicated certification like EN 9100 is not required, Exxelia applies IRIS standards and complies with IEC/EN regulations specific to railway applications. Our quality processes ensure component compliance for trains, metros, and tramways, including fire safety and electromagnetic compatibility.

Yes. Exxelia meets defense industry requirements through its EN 9100 certification and compliance with military standards (MIL-STD, STANAG). Our components are qualified for critical applications such as RF systems, embedded electronics, guided munitions, or radar systems. Some products are also subject to customer-specific qualification procedures.

These capacitors are designed for several demanding applications. Typical use cases include:

• Motor engine exciters.
• Thruster and propulsion power units.
• Ignition systems, PFN, and other rapid pulse applications.
• Traveler Wave Tubes (TWT) used for radars and seekers.
• High voltage filtering.

The capacitance for the CM-HVLP series ranges from 10 nF to 750 nF. The components handle rated continuous voltages between 1500 VDC and 4000 VDC, while supporting maximum discharge voltages for pulse applications from 2500 VDISCH up to 5000 VDISCH.

If your application requires RoHS compliance, you can easily specify this by including the letter "W" in your ordering code (for example, "CM-HVLP W"). Standard orders without the "W" are not RoHS compliant.

We offer AS9100/EN9100 qualified solutions for you inverters/DC-Link/converters/power supplies from few hundred watts to some MW with benefit of weight and volume saving

• 1200 V high temperature radial/SMD capacitors with our CF-PP140 Series (Up to 30% smaller and lighter than usual solution)
• 1200 V Bus bar Capacitors (Up to 60% smaller and lighter than usual solution)
• Film (CM HVLP) & ceramic (C48X C-series) Technology, Common mode capacitors up to 5Kv
• Smart integrated magnetics

Each solution can be manufacrtured both in Europe or in the US

Standard ceramic capacitor lead times typically range from 8 to 14 weeks, depending on the product type, configuration, and manufacturing requirements. Leaded and coated  disc capacitors and leaded and coated multilayer capacitors may have different production timelines. Space-level capacitors, enhanced testing, and additional screening requirements may extend lead times slightly. Exxelia-CalRamic is committed to dependable delivery performance and has a strong track record of meeting agreed upon schedules.

All Exxelia CalRamic products continue to be proudly manufactured in the USA at our facility in Reno, Nevada. This ensures full compliance with domestic sourcing requirements for US defense and aerospace applications.

Exxelia CalRamic Technologies LLC, is a U.S.-based High Voltage Ceramic Capacitor manufacturer with over 30 years’ experience.  Our team focuses on producing exceptional quality capacitors by using superior quality materials with a highly trained team.

Exxelia CalRamic produces a variety of components in a multitude of configurations ranging from 500VDC to 80KVDC. Our Lean Manufacturing principles provide shorter lead times, rapid prototype turnaround deliveries, multiple design derivations for your custom application, and a variety of dielectric types depending on your specific application.

Our quality control system conforms to and exceeds ISO 9001-2015 requirements.  We manufacture capacitors suitable for a wide range of applications like: Geothermal, Commercial/Industrial, Medical, Commercial Aerospace, Ground Based Military, Military Aerospace and even Hi-Reliability Space Satellite Systems.  Our manufacturing design guidelines, material choices, and precision controls result in performance-based High Voltage Capacitors for your specific application.  

The Exxelia CalRamic Technologies Leadership has created a culture that encourages personal growth and success for each team member, while building a We Succeed as a Team environment.  In addition, we look for opportunities to support our local community through non-profit involvement and Exxelia CalRamic Team events throughout the year.

We are committed to the best approaches and practices that limit environmental impact, and an extensive safety and awareness training program that limits hazardous exposures to our Team Members.  

Exxelia CalRamic Technologies LLC is fully committed to our clients’ success.  On our website we offer a full ceramic capacitor educational library with Application Notes and Product Training Modules that help our clients understand the technical nature of High Voltage Ceramic Capacitors.

Exxelia CalRamic specializes in High-Voltage Ceramic Capacitors. The core catalog includes:  

• Multilayer Ceramic Capacitors (MLCC): Radial leaded and surface mount.  
• High-Voltage Leaded Disc Capacitors.  
• SMPS Capacitors: High-voltage Switch Mode Power Supply ceramic capacitors.  
• High-Temperature Capacitors: Specialized components rated for up to 200°C (ideal for downhole and geothermal applications).

Yes, Exxelia CalRamic has the ability, in most cases, to “FAST TRACK” orders when required, and sometimes lead times can be lowered to as little as 2-3 weeks ARO.  This is offered at an additional cost and one of Exxelia CalRamic’ s team members can assist with setting up your expedited order.

Exxelia-CalRamic offers a range of screening options for high-voltage ceramic capacitors, using MIL-PRF-49467 as a reference basis where applicable. Available screening may include full Group A, Partial Discharge, and additional electrical or environmental testing based on customer requirements. When more extensive qualification is needed, Group B screening can also be supported, including fully rated life testing for up to 4,000 hours. Ultrasonic C-SAM screening is available when required for enhanced inspection. CalRamic can also incorporate many customer-specific screening specifications into the manufacturing and test process. For detailed options, pricing, and lead-time impact, please contact Exxelia-CalRamic’s technical team.

• MOQ: There are no minimum order quantities; we support everything from single-prototype units to large production runs.  
• Lead Times: Standard lead times range from 10 to 14 weeks. However, a "Fast Track" expedited option is available for urgent requirements, reducing lead times to as little as 2 to 3 weeks. Same-day shipping is also available for in-stock inventory.

Exxelia-CalRamic does not impose standard minimum order quantity requirements. We support a wide range of customer needs, from single-capacitor requirements for engineering  evaluation or prototype development to production quantities in the thousands. Order quantities are evaluated based on the customer’s application, technical requirements and production schedule.

Exxelia CalRamic has an extensive Library database of application notes encompassing all aspects of high voltage ceramic capacitors. In this database you can find detailed information around Soldering Multi-Layer Capacitors AN101, Wave Soldering Multi-Layer Capacitors AN102, Soldering Rework Methods AN108 and Soldering Methods for SMPS style capacitors AN116. All these application notes and many more can be found on our Application Notes page and if more information is needed don’t hesitate to contact one of our technical team members.

Exxelia CalRamic capacitors can be screened based on MIL-PRF-49467 standards. Available testing options include:  

• Full Group A and Group B Screening (including up to 4,000 hours of fully rated life testing).  
• Partial Discharge Screening.  
• Ultrasonic C-SAM Inspection. 

Exxelia CalRamic has a variety of High Voltage Ceramic Capacitor inventory that are in-stock and can ship same-day upon receipt of your order. If you are looking for prototype quantities, or initial LRIP quantities, contact us for part specific availability.  We can sometimes ship the same day ARO.

Custom designs and catalog product modifications are 40% of what we manufacture to help our clients in their specific High Voltage requirements.  Sometimes this can be done at no additional cost to the client.

No, Exxelia CalRamic Technologies does not obsolete products that have been designed for a client.  It is our objective to maintain our ceramic capacitor product mix and supply for our clients without discontinuation.

Yes. Exxelia-CalRamic offers customized ceramic capacitor capabilities, including custom designs and modifications to catalog products. Custom and modified products represent approximately 40% of our manufacturing activity and are developed to support customers with demanding high-voltage application requirements. Depending on the scope of the modification and the technical requirements involved, certain customizations may be available with little or no additional cost.