EFC/WESCO
EFC/WESCO is a privately held U.S. film capacitor manufacturer founded in 1981, producing custom and catalog capacitors across five dielectric families for medical, imaging, power supply, audio, and power switching OEMs.
- Company typePrivate
- Founded1981
- HeadquartersWaterbury, United States
- Headcount11–50
- GTM typeB2B
- OfferingHardware or Manufacturing
What EFC/WESCO does
EFC/WESCO, legally Electronic Film Capacitors, Inc., is a privately held U.S. film capacitor manufacturer founded in 1981 and headquartered in Waterbury, Connecticut. The company designs and produces custom and catalog film capacitors spanning five dielectric families — polyester, polypropylene, polystyrene, polycarbonate, and polyphenylene sulfide — and sells into OEMs across medical equipment, scanning/imaging, power supplies, audio, and power switching applications. Its product portfolio includes specialty lines such as the DC Link capacitor series (C51–C58), the MKP EMI suppression family (MKPX1, MKPX2, MKPY2, MKP RCS, MKP RCP), snubber capacitors, high-current and high-voltage series, AC filters, resonant capacitors, and hermetically sealed PPS capacitors (Series 2113HS) targeted at harsh-environment and aerospace-adjacent use cases. All production is conducted at a single ISO 9001:2015-certified manufacturing facility in Waterbury.
The company operates a sales-led go-to-market executed through a geographic representative network across the U.S., Canada, and international markets, complemented by authorized U.S. distributors and direct factory sales supported by engineering and tech-help email channels. Pricing is quote-based and not publicly disclosed; customers configure capacitance, tolerance, voltage, dielectric, and form-factor parameters, and EFC/WESCO accepts orders of any quantity, including small-batch custom jobs. Following founder and President Jay Weiner's retirement in June 2014, leadership transitioned to Bob Fountain, Len Gelonese, and Angela Sousa, and the company has continued to introduce new product lines — most notably the DC Link capacitors in October 2014 and additional C-series power capacitors in 2016 — while maintaining an annual exhibition presence at the Applied Power Electronics Conference (APEC) since at least 2010.
Revenue figures are not publicly disclosed and there is no evidence of venture capital, private equity, or institutional investment. The company is privately held by a small management group and competes in a niche within the broader passive electronic components industry on customization, lead times, and application-engineering support rather than scale economics.
EFC/WESCO firmographics
Firmographics- Name
- EFC/WESCO
- Legal name
- Electronic Film Capacitors, Inc.
- Website
- https://filmcapacitors.com
- Company type
- Private
- Founded year
- 1981
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- EFC/WESCO is a privately held U.S. film capacitor manufacturer founded in 1981, producing custom and catalog capacitors across five dielectric families for medical, imaging, power supply, audio, and power switching OEMs.
- Ownership category
- akta.pro rank
EFC/WESCO industry classification
Industry- Product category
- Electronic Components Manufacturing
- NAICS
- Capacitor, Resistor, Coil, Transformer, and Other Inductor Manufacturing (334416)
- SIC
- Electronic & Other Electrical Equipment (No Computer Equip) (3600)
- akta.pro primary industry
- Capacitors (Ceramic/Film/Electrolytic/Tantalum/Supercapacitors) (HDAHANAB)
Keywords
Where EFC/WESCO is headquartered
LocationHeadquarters
- HQ city
- Waterbury
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
EFC/WESCO business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Personnel, Operations, Infrastructure, Marketing or Sales
Revenue model
- Custom Film Capacitor Sales: Manufacture and sale of custom film capacitors across multiple dielectric types (polyester, polypropylene, polystyrene, polycarbonate, polyphenylene sulfide) and applications (power, high voltage, DC link, EMI suppression, snubber). Orders of any quantity are fulfilled.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Multi-year contract | Quote-based pricing for custom specifications |
Go-to-market motion1 record
Distribution channels5 records
Marketing channels6 records
EFC/WESCO product offering
Product offeringCore offering
EFC/Wesco (Electronic Film Capacitors, Inc.) manufactures and sells custom film capacitors using multiple dielectric materials including polyester, polypropylene, polystyrene, polycarbonate, and polyphenylene sulfide films. The company produces standard catalog items as well as customized capacitor specifications for OEMs in medical, scanning/imaging, power supply, audio, and power switching applications. Orders of any quantity are fulfilled from their Waterbury, CT manufacturing facility.
Product overview
EFC/Wesco is a film capacitor manufacturer offering a comprehensive portfolio of film capacitor products across multiple dielectric materials and application categories. The product line includes polyester capacitors (Series 1306, 1313), polypropylene capacitors (Series 1206, 1213), polystyrene capacitors (Series 1906), polycarbonate capacitors (Series 1613), and polyphenylene sulfide capacitors (Series 2113, 2113HS). The company also provides specialized power capacitors including EMI suppression capacitors (MKP series: MKPX1, MKPX2, MKPY2, MKP RCS, MKP RCP), snubber capacitors (MF1206 and M1213 series), high current capacitors (SP1213TC, C62 series), direct mount capacitors (PC1213EFR, C31 series), AC filters (C72 series), resonant capacitors (C44 series), RC networks (RC1313EFR), and high voltage capacitors (HV1313TC, HV1213TC). The flagship DC Link capacitor series (C51 through C58) serves energy storage applications in power conversion systems. Products are available as standard catalog items or can be customized to specific application requirements.
Differentiator
Problem solved
Functional benefit
Products and services
- Polyester Film Capacitors (Series 1306, 1313, AC1313) Foil and metallized polyester film capacitors for general-purpose and AC applications, including self-healing metallized variants. Used across power, lighting, and consumer electronics applications.
- Polypropylene Film Capacitors (Series 1206, 1213)
- Polystyrene Film Capacitors (Series 1906)
- Polycarbonate Film Capacitors (Series 1613)
- Polyphenylene Sulfide Film Capacitors (Series 2113, 2113HS Hermetic)
- High Voltage Capacitors (HV1313TC Polyester, HV1213TC Polypropylene)
- EMI Suppression Capacitors (MKP Series: MKPX1, MKPX2 275/310 VAC, MKPY2, MKP RCS, MKP RCP)
- Snubber Capacitors (MF1206 High Pulse, M1213 Max Pulse)
- High Current Capacitors (SP1213TC, C62 Series)
- Direct Mount Capacitors (PC1213EFR, C31 Series)
- AC Filters (C72 Series)
- Resonant Capacitors (C44 Series) Resonant capacitors optimized for resonant power conversion and induction heating applications.
- RC Networks (RC1313EFR)
- DC Link Capacitors (C51, C52, C53, C54, C55, C56, C58 Series) Complete line of DC Link capacitors for DC bus energy storage in power conversion systems, providing film versus electrolytic advantages in power electronics applications.
Companies that use EFC/WESCO
Customer profileSegments5 records
Ideal customer profiles5 records
EFC/WESCO technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
EFC/WESCO partnerships and signals
Strategic signalScale indicators1 record
Recent moves8 records
Expansion highlights6 records
EFC/WESCO competitors and assessment
Company assessmentBroad incumbents
- KEMET (Yageo): Major global capacitor manufacturer (now part of Yageo) with film capacitor lines alongside MLCCs, tantalum, and electrolytics — competes across EFC/Wesco's portfolio with far larger scale and broader customer reach.
- Panasonic: Major Japanese capacitor manufacturer (including film capacitor lines) supplying industrial, automotive, and consumer electronics — competes across EFC/Wesco's standard product lines at much greater scale.
- Vishay Intertechnology: Global incumbent offering an extensive portfolio including film capacitors across all major dielectrics, with significantly broader scale, global manufacturing, and direct overlap in DC link, snubber, and EMI suppression product categories.
- Nichicon: Japanese capacitor specialist with film and aluminum electrolytic lines serving industrial, power electronics, and EV charging markets — broad incumbent with overlapping product categories.
- TDK Corporation: Diversified Japanese electronics giant whose EPCOS division supplies film capacitors for power electronics, automotive, and industrial applications — broad incumbent with overlapping DC link and EMI suppression products.
Direct peers
- Cornell Dubilier Electronics: Long-established US manufacturer of film, mica, and aluminum electrolytic capacitors with deep custom manufacturing capabilities for power electronics, medical, and aerospace — directly comparable product portfolio, customer base, and customization model to EFC/Wesco.
- Aerovox: US manufacturer specializing in custom film capacitors, AC motor run, and power factor correction capacitors for industrial and military applications — directly comparable custom film capacitor focus.
- ASC Capacitors: Specialty US manufacturer of custom film capacitors for power electronics, audio, and military/aerospace applications with hermetic and high-voltage capabilities — a direct small-scale competitor serving overlapping customers.
- Electronic Concepts Inc. US custom film capacitor manufacturer serving defense, aerospace, medical, and industrial power electronics with hermetic and high-voltage capability — directly comparable specialty manufacturing niche.
- WIMA: German specialist in plastic film capacitors (polypropylene, polyester, PEN) for industrial, audio, and power electronics applications — competes in the same film capacitor niche globally with a comparable custom/standard hybrid model.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights6 records
Customer concentration
EFC/WESCO social profiles
Digital presenceEFC/WESCO compliance and trust
Trust signalCompliance2 records
EFC/WESCO financial estimates
Financial estimateRevenue estimate
Valuation estimate
EFC/WESCO leadership team
Management profileNumber of profiles
Profiles4 records
EFC/WESCO funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
EFC/WESCO M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about EFC/WESCO
What does EFC/WESCO do?
EFC/Wesco (Electronic Film Capacitors, Inc.) manufactures and sells custom film capacitors using multiple dielectric materials including polyester, polypropylene, polystyrene, polycarbonate, and polyphenylene sulfide films. The company produces standard catalog items as well as customized capacitor specifications for OEMs in medical, scanning/imaging, power supply, audio, and power switching applications. Orders of any quantity are fulfilled from their Waterbury, CT manufacturing facility.
Is EFC/WESCO a public or private company?
EFC/WESCO is a private company. It is classified as management employee owned and is currently operating.
When was EFC/WESCO founded?
EFC/WESCO was founded in 1981. It employs 11 to 50 people.
Where is EFC/WESCO based?
EFC/WESCO is headquartered in Waterbury, United States, in the North America region.
How does EFC/WESCO make money?
One revenue line is on record: custom Film Capacitor Sales.
Who are EFC/WESCO's main competitors?
Broad incumbents on record are KEMET (Yageo), Panasonic, Vishay Intertechnology, Nichicon and TDK Corporation. Direct peers are Cornell Dubilier Electronics, Aerovox, ASC Capacitors, Electronic Concepts Inc. and WIMA.
Does EFC/WESCO have an API?
No public API is recorded for EFC/WESCO.
What industry is EFC/WESCO in?
EFC/WESCO's product category is Electronic Components Manufacturing. Its primary akta.pro industry code is HDAHANAB, Capacitors (Ceramic/Film/Electrolytic/Tantalum/Supercapacitors). Its NAICS code is 334416 and its SIC code is 3600.