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Exxelia aerospace Capacitors

Allied International first introduced Eurofarad and Firadec capacitors to North America in 2001. We made a joint sales call to GE Niskayuna  with a  Eurofarad engineer on September 10, 2001, right before 9/11.  Today Allied International is the most experienced and only exclusively Exxelia franchised Distributor in North America. As an Exxelia distributor our MOQ are lower than OEM.  We know Exxelia: the product lines and the people.  We can get you the fastest answers, best prices and delivery, because Exxelia is a major part of our business.  We will help you find a custom solution if necessary. Don’t waste your time on the big box giant distributors. The giant distributors are the right source for passive components manufactured in the millions or hundreds of thousands which are stocked and sold robotically, but they are not geared to supporting niche market relatively low volume high rel passives manufactured on demand. We are.

Exxelia factories in France, USA, Morocco, Vietnam and India  make passive components including capacitors, filters, position sensors, slip rings and wound magnetics.  Rather than high volume markets like automotive and consumer electronics, Exxelia is focused on  specific demanding industrial applications. Aviation, defense, space, medical, railway, oil & gas and telecommunications industries rely on Exxelia filters, capacitors and wound magnetic components for energy storage, power electronics, power generation and signal filtering. Grouped under the Exxelia brand as the Capacitor GBU are former Eurofarad film and ceramic capacitors, Firadec Tantalum capacitors, SIC SAFCO aluminum electrolytic capacitors, Dearborn Electronics film capacitors and  Temex microwave ceramic capacitors, The Exxelia magnetics GBU incorporates the former  , Microspire  and N’ERGY in France, Microspire in Morocco, along with RAF Tabtronics and De Young in the USA. Magnetics products include custom and off the shelf low, medium and high power transformers, inductors, chokes , rotors and stators.

Exxelia Magnetics GBU

Exxelia Magnetics was formed through the merging of Exxelia Microspire and Exxelia N’Ergy, in 2016. Exxelia Magnetics brings together all French based activities of design and manufacture of high-end electromagnetic components: transformers and inductors, electro-magnets, rotors and stators.

Exxelia Microspire specializes in the design, marketing and production in small quantities of high precision inductors and transformers for high-performance applications in high grade electronics. With more than 25 years experience, Exxelia Microspire is a leader in wound magnetics .

Microspire know how includes linear and toroidal winding standard technologies as well as specific technologies developed for demanding markets.

Main advantages of the  designs are :
• Qualified technologies (shock, vibration, burn in tests),
• Experience with customers requiring high precision in harsh environment
• Obsolescence management of materials and toolings,
• No Non Recurrent Cost for custom product in the qualified design.

Microspire has defined gluing, marking, varnishing processes that allow the products to go through more than 5 cleaning cycles and operating up to 180°C. Processes compliant to ESA and NASA outgassing standards have also been defined for products specified up to 140°C.

Download a Microspire catalog

Video overview of Exxelia Magnetics

RAF Tabtronics is a leader in the design and manufacture of custom electromagnetic transformers, inductors, coils and power conversion assemblies. The factory is located in Piffard NY.

Exxelia DeYoung Inc. has manufactured custom electro-magnetic components since 1972. Today the company is one of the few remaining resources for high mix, high reliability products handmade in the U.S., available in quantities from one to thousands per year and backed by experienced in-house design engineering support. Low to mid volume, high complexity products manufactured in Kirkland, WA Higher volume / lower cost production capacity available through Exxelia Vietnam


Exxelia’s Film Caps were formerly sold under the Eurofarad brand name. Plastic film dielectrics include :

Polyphylene Sulfide PPS
Teflon PTFE
Polycarbonate PC
Reconstituted Mica
polypropylene/paper and polyester dielectrics impregnated in oil or wax.
polyester PET
polypropylene PP

  • Features:
    Large range of capacitance 10 nF to 1000 µF,
  • High electrical and mechanical performance,
  • High reliability,
  • Self healing,
  • Non polarized,
  • Custom design,
  • Light weight,
  • Voltage: 50 V to 10000 V ,
  • Current up to 50 A,
  • Temperature range 55°C +125°C
  • Space qualified parts

Although volumetrically larger than equivalent value ceramic capacitors, Exxelia plastic film particularly the PET such as the PM series are winning converts to replace equivalent ceramics due to the lightwieight and reliability owing to self healing property which reduces the necessary safety factor. Commonly used in HF SMPS (High Frequency switch mode power supplies)



EXXELIA are world leaders in high reliabity  film capacitors qualified  by the European Space Agency. Exxelia conventional film capacitors like all other makes are fabricated by winding two or more layers of dielectric film and electrodes.The electrodes are applied by evaporation under vacuum on the dielectric (metallized film capacitors) or consist of separate metal foils ( film-foil capacitors). Dielctrics used by Exxelia are Plastic Films such as Polycarbonate, P.P.S., Polyester (P.E.T., P.E.N.), Polypropylene, Polystyrene, Teflon® as well as reconstututed Mica.

The breakthrough is that for the first time EXXELIA has figured out how to stack the layers of elctrode and film instead of winding. This process yields significant advantages in terms of capacitance density, volume and weight while losing none of the advantages of film technology. The graphic highlights the significant benefits.

  • Denser, smaller, lighter than X7R MLCC, PP film , or PET film
  • MML : Miniature Micro-Layer is a breakthrough in film capacitor design
  • Stacked layers of polymer film instead of wound film construction
  • 60 % reduction in size vs conventional film capacitors
  • Operating tmperature up to 140 C
  • Self healing, does not need to be derated like ceramic MLCC
  • Comparable size and considerably lighter vs equivalent MLCC
  • From Exxelia the leaders in Space qualified Film caps
  • Ratings up to 1000 volts
  • Capacitance up to 1000 uF
  • Contact Allied International for more information



Exxelia’s US plant formerly Dearborn Electronics manufactures a range of military specification plastic film capacitors in the United States, including replacements for obsolete polycarbonate film caps. Custom designed capacitors have been designed using dielectrics such as Polyester, Paper, Polystyrene, Polycarbonate, Polysulfone, Polyvinydene Fluoride (PVDF), Polyethylene Naphtalate (PEN), and Fluorene Polyester (FPE). FPE has an operating temperature of up to 300°C and is one of the films that is part of the continuous research of very high temperature films at Exxelia USA,

SMD wet tantalum capacitor


Allied International introduced Exxelia’s Firadec brand as  a technically and commercially competitive  source  of wet tantalum capacitors for  applications in the oil exploration industry  notable for  the most extreme temperature, vibration and shock environmental conditions encountered by embedded electronics.   Exxelia Wet Tantalum capacitors  ST78 and CT78 are now qualified for down hole and other critical applications up to 200° C and Exxelia  are working on the 220 and 240 degree capacitors  that will be needed for the deeper wells. Pictured is an SMD wet tantalum cap with Kapton sleeve.

wet tantalum capacitor


Exxelia has received the M-Level (1.0%/1000h) MIL 39006/22 and MIL-PRF-39006/25F qualifications approval for its new ranges of wet tantalum capacitors.

MIL 39006/22 and MIL 39006/25 respectively equivalent to CLR79 and CLR81 types feature hermetically sealed cylindrical tantalum cases and axial leads. Both ranges are available in all cases:  T1, T2 T3 and T4 with extended capacitance and voltage ratings.

MIL39006/22 is qualified for voltages from 6V to 125V and provides from 1200µF @ 6V to 56 µF @ 125V. MIL 39006/25 is qualified for voltages from 25V to 125V and provides from 680µF @ 25V to 82 µF @ 125V. Both ranges combine high energy density with large temperature ranges -55°C up to 125°C and are available with H vibration and shock levels.


The  EXXELIA (Firadec) CTC21 surface mount solid tantalum  has no equivalent from other manufacturers. It offers very low parasitic characteristics (i.e. low ESR and ESL) so that the capacitor can work at high frequencies without over heating because of too many losses. The catalogue product is very reliable. Higher levels of reliability are nevertheless available (up to space level, in accordance to European Space Agency recommendations).- The tantalum dielectric technology is the one which offers the highest values of capacitance in a given volume.

CTC21 Weight: approx. 2,8g Dimensions: D case: 11X12,5X5,5 mm From 6,3V to 100V (63V in ESCC spec.) From 5,6 to 680µF EPPL European Space Agency approved product


EXXELIA (formerly Eurofarad) MLCC Precious metal electrode capacitors offer special feature for demanding applications:

  • Very low temperature (-196°C, -269°C).
  • Complex functions (RC, RLC)
  • Specific shapes on request.
  • Gold and  Polymer terminations.
  • Very high temperature (> 200°C) Ceramic encapsulated Families design,
  • Light weight,
  • Voltage: 50 V to 100 V ,
  • Current up to 50 A,
  • Temperature range 55°C +125°C
  • PME ceramic capacitors have significantly longer lifetime than Base Metal Electrode ceramic capacitors

European Space Agency  (ESA) qualified parts are available.

Available in stock: TCK282 S 0.022 UF +/- 10% 3000 V

Cubisic LP (low profile) electrolytic with insulating sleeve


EXXELIA aluminum electrolytic capcitors were sold for many years under the SIC SAFCO brand name.


  • High Energy storage, second only to tantalum,
  • low ESR ,
  • long life, 8000 hours on snap-in parts  exceeds competitors
  • screw terminal, snap-in terminal,
  • low profile, radial, and axial,
  • many different case sizes,
  • Operating temperatures -55 C to +145C,
  • voltage to 630 volts.
  • SIC SAFCO make their own electrolyte
  • work in altitude up to 28,000 meters (92,000 ft.)
  • 20g products are available
  • New Cubisic HLTP flatpack features up to 60% more capacitance than any other rectangular capacitor on the market.


EXXELIA TECHNOLOGIES designs and manufactures EMI-RFI filters in different low pass configurations (C, L, Pi, T, 2 x Pi, 2 x L and 2 x T) intended to protect electronic equipment from interferences. Capacitors are a key components in a filter and thanks to its expertise in the field, EXXELIA TECHNOLOGIES is able to manufacture high-end solutions combining performance and reliability.


Buy  RF and Microwave High-Q Capacitors, Tuning Elements, Dielectric Resonators and Ferrites from Allied International, franchised Exxelia Temex distributor. Compare our price and delivery against comparable capacitors from ATC and PP.


Operating frequencies in wireless communications have shifted towards high frequency band, and thus frequencies higher than 1 GHz are now commonly utilized. In addition, the microwave frequency spectrum becoming severely crowded and sub-divided into many different frequency bands, designers are systematically looking for resonators giving them a narrow bandwidth with smaller size. But selecting the right dielectric material for a given microwave application is a difficult challenge.
EXXELIA TEMEX, being one of only a few manufacturers producing its own raw materials, is definitely the right partner to support designers at the early stage of development.


OhmCraft resistors  feature exceptional performance characteristics,
size and higher resistance values. OhmCraft resistors feature close tracking, low current noise, current-voltage linearity, low TCR, and close resistance tolerance along with high durability, wide resistance range, and low cost. Ohmcraft chip resistors feature voltage ratings significantly higher than conventional resistors of the same size.


Exxelia has a wide range of products conceived to support specialized applications like aerospace, defence, railways, medical and downhole where consumer rated parts do not fit the bill. For an overview of all the Exxelia products available from Allied International, franchise distributor,  download the  full listing Exxelia 

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