What ASC Capacitors does

ASC Capacitors, operating as American Shizuki Corporation (ASC), is a US-based manufacturer of custom film and foil capacitors serving demanding industrial, power electronics, renewable energy, traction, automotive, and military applications. The company produces DC-rated capacitors from 50V to 30,000V and AC-rated capacitors from 120V to 2,500V using non-inductive wound polypropylene film and foil construction, with additional dielectric options including metallized polypropylene, polyester, polyphenylene sulfide, and foil, packaged in epoxy-dipped, oil-filled, aluminum-can, plastic-case, and self-encased form factors. ASC's catalog comprises more than 14,000 product variants across multiple series, supplemented by custom-engineered designs tailored to specific voltage, capacitance, size, and environmental requirements, with operating temperature ranges from -55°C to +125°C and lifecycle ratings up to 100,000 hours.

ASC is a wholly-owned subsidiary of Japan's Shizuki Electric Company Inc. (founded 1939), operating from a 120,000+ square foot manufacturing and sales headquarters in Ogallala, Nebraska — a facility originally founded as Goodall Electric Company in the 1940s, acquired by TRW Electronics in the 1960s, and purchased by Shizuki Electric in 1987. The business leverages the broader Shizuki Group's global manufacturing footprint, including plants in Akita, Kyushu, Okayama, and Nishinomiya (Japan) and Bangkok (Thailand), alongside a Murata-Shizuki joint venture (Murata Shizuki FC Solutions Co., Ltd.) for film capacitor development.

The company generates revenue through direct sales (internal team and independent sales representatives covering US states), an authorized distributor network spanning North America and APAC (Marsh Electronics, Hughes-Peters, Projection Unlimited, RS Group, IBS, Masline, Seamax Engineering, Atlantic Components, New Yorker Electronics), and import/export sales via Shizuki Electric (Shanghai) Trading. Pricing is quote-based and not publicly disclosed, with custom-engineered solutions handled through a part-request workflow on the company website. In November 2024, ASC and Murata jointly launched the FH Series of 125°C-rated high-temperature film capacitors targeting EV/hybrid powertrain inverters, marking the company's most recent product expansion into automotive power electronics.

Name

ASC Capacitors

Legal name

American Shizuki Corporation

Website

https://ascapacitor.com

Company type

Private

Founded year

1940

Operating status

Operating

Headcount range

51–100 employees

Short description

ASC Capacitors (American Shizuki Corporation) is a US-based, wholly-owned subsidiary of Japan's Shizuki Electric that manufactures custom film and foil capacitors (DC 50V–30,000V; AC 120V–2,500V) for industrial, renewable energy, rail, automotive, and military customers via direct sales and an authorized distributor network.

Ownership category

akta.pro rank

Product category

Electronic Components - Film Capacitors

NAICS

Capacitor, Resistor, Coil, Transformer, and Other Inductor Manufacturing (334416), Electrical Equipment, Appliance, and Component Manufacturing (335)

akta.pro primary industry

Capacitors (Ceramic/Film/Electrolytic/Tantalum/Supercapacitors) (HDAHANAB)

Keywords

• Film foil capacitors
• DC link capacitors
• Snubber capacitors
• AC filter capacitors
• Custom capacitor design

Headquarters

HQ city

Ogallala

HQ country

United States

HQ region

North America

Offices12 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Custom Film and Foil Capacitor Sales: ASC Capacitors generates revenue through the manufacture and sale of custom film and foil capacitors. The company offers a catalog of over 14,000 products across multiple series (321, 329, 355, 356, 368, 621, 622, 663, BHV, BLF, X300, X321-X389, etc.) and also provides custom-engineered capacitor solutions tailored to unique electrical and mechanical requirements. Sales are conducted through direct sales, authorized distributors, and sales representatives.

Pricing tiers

Go-to-market motion2 records

Distribution channels11 records

Marketing channels6 records

Core offering

ASC Capacitors (American Shizuki Corporation) is a US manufacturer of custom film and foil capacitors, headquartered in Ogallala, Nebraska with over 120,000 square feet of production space. The company produces a catalog of over 14,000 capacitor variants across multiple series for DC (50V–30,000V) and AC (120V–2,500V) applications, including DC link, snubber, AC filter, harmonic filtering, power supply/pulse current, IGBT snubber, and home appliance configurations. ASC also engineers custom capacitor solutions tailored to specific voltage, capacitance, size, and environmental requirements for industrial, renewable energy, automotive, traction, military, and consumer electronics customers.

Product overview

ASC Capacitors (American Shizuki Corporation) is a manufacturer of custom film and foil capacitors for demanding industrial applications. The product portfolio includes multiple capacitor series (321, 329, 355, 356, HCG/HCO, and X-series variants) organized by application type: DC Link capacitors for power conversion, Snubber capacitors for circuit protection, AC Filter capacitors, and Traditional Film capacitors. The company also offers Custom Capacitor Solutions for specialized requirements. Capacitors are categorized by industry applications including Electronics & Board Level Through Hole, Home Appliance, UPS, Traction Systems Rail, Motor Drive, Converter/Inverter, and Harmonic Filters. The product lineup spans various voltage ratings (from 50V to 30,000V DC, and 120V to 2500V AC), dielectric materials (polypropylene, polyester, foil), and form factors (epoxy dipped, tape wrap, aluminum cans with oil/gel).

Differentiator

Problem solved

Functional benefit

Products and services

• Film & Foil Capacitors (321 Series) Epoxy dipped film capacitors with non-inductive wound polypropylene film and foil construction, designed for filtering, general purpose, and instrumentation applications across industrial electronics.
• IGBT Snubber Capacitors (329 Series) Metallized film and foil capacitors engineered for IGBT snubber circuits, motor drives, and power conversion systems including DC-AC inverters, AC-DC converters, and UPS systems.
• Power Supply/Pulse Current Capacitors (355 Series) Tape wrap and epoxy fill film capacitors designed for power supply and pulse current applications with high temperature range tolerance.
• Radial Lead Film Capacitors (356 Series) Cost-effective radial lead film capacitors for signal processing, power supplies, audio applications, and noise suppression.
• Harmonic Filtering Capacitors (HCG/HCO Series) High quality metallized polypropylene film capacitors designed for AC harmonic filtering, power factor correction, input/output filtering in UPS systems, motor drives, LC/LCL filtering, and renewable energy applications.
• High Voltage DC Link Capacitors Capacitors designed for DC link applications in solar power inverters, wind power systems, and power conversion equipment.
• Snubber Capacitors Film capacitors designed to protect switching devices in circuits by absorbing voltage spikes and limiting transient energy for motor drives and industrial automation.
• AC Filter Capacitors Capacitors for AC filtering applications in power electronics and electrical systems.
• Traditional Film Capacitors Standard film capacitor series for general purpose industrial applications.
• White Goods/Home Appliance Capacitors Capacitors designed for home appliances and light industrial equipment applications (X382G and X382O series).
• Custom Capacitor Solutions Custom-engineered capacitor designs tailored to unique electrical and mechanical requirements, including special voltage, capacitance, size, and environmental specifications, submitted via part request form.
• FH Series High Temperature Film Capacitor

Quantifiable outcome

• Product lifecycle ratings up to 100,000 hours in demanding applications
• +3 more outcomes

Segments7 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Seven partnerships are on record, tiered core and minor.

• Murata Manufacturing Co., Ltd. / Shizuki Electric Co., Inc.coreStrategic or Co-development Partner · 9 November 2024Murata and Shizuki Electric jointly developed the FH series of heat-resistant film capacitors capable of operating at 125°C. These capacitors are designed for converters and motor drive inverters in environmentally friendly automobiles and other high-temperature applications. Samples are scheduled to be available. This represents a co-development partnership combining Murata's and Shizuki Electric's technologies.
• Murata Shizuki FC Solutions Co., Ltd.coreStrategic or Co-development PartnerA related company jointly established with Murata for the development and production of film capacitors. Located in Nishimonai, Ugo-machi, Akita, Japan. This entity represents the deepest integration between Murata and the Shizuki Group for film capacitor technology.
• Marsh Electronics, Inc.coreChannel Partner/ Reseller/ DistributorAuthorized distributor serving USA and Canada markets. Marsh Electronics provides local inventory, technical support, and fulfillment services for ASC capacitor products in North America.
• Hughes-PeterscoreChannel Partner/ Reseller/ DistributorAuthorized distributor serving USA and Mexico markets. Hughes-Peters distributes ASC capacitor products in the southern and central United States and Mexico.
• RS GroupcoreChannel Partner/ Reseller/ DistributorAuthorized distributor serving North America. RS Group is a global distributor providing broad market access for ASC capacitor products across North American markets.
• Seamax EngineeringminorChannel Partner/ Reseller/ DistributorAuthorized distributor serving the Asia-Pacific (APAC) region. Seamax Engineering provides local distribution support for ASC products in the APAC market.
• Shizuki Electric Company Inc. (Parent)coreOthersShizuki Electric Company Inc. is the parent company of American Shizuki Corporation (ASC). Founded March 10, 1939, and headquartered in Nishinomiya, Hyogo, Japan. Shizuki Electric acquired the capacitor division of TRW Electronics in Ogallala, Nebraska in 1987 and has since developed ASC into a global capacitor manufacturer. ASC is a division of Shizuki Electric Group.

Scale indicators6 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Nichicon Corporation: Nichicon is a Japanese capacitor specialist with leading positions in aluminum electrolytic and film capacitors for power electronics, EV inverters, and industrial applications — a comparable Japanese-domiciled peer to ASC's parent Shizuki Electric in the film capacitor category with similar automotive/EV exposure.
• WIMA GmbH & Co. KG: WIMA is a German film capacitor specialist focused on custom and standard film capacitors (polypropylene, polyester, PEN) for industrial electronics, audio, automotive, and power applications — a direct specialty peer in custom film/foil capacitor engineering with comparable niche positioning.
• Cornell Dubilier Electronics: Cornell Dubilier is a US-based specialist in film, mica, and electrolytic capacitors with deep expertise in custom-engineered solutions for industrial, military, aerospace, and power electronics — the closest pure-play direct peer to ASC in custom film capacitors for demanding applications.
• Rubycon Corporation: Rubycon is a Japanese capacitor manufacturer specializing in film and electrolytic capacitors for industrial, power electronics, and renewable applications — a comparable specialty capacitor peer to ASC, with similar Japanese manufacturing heritage and end-market overlap.

Broad incumbents

• TDK Corporation: TDK is a Japanese passive component giant with a broad film capacitor portfolio (EPCOS-branded) spanning DC link, AC filtering, and power electronics applications — overlapping ASC's industrial, renewable energy, and automotive markets, but with vastly greater scale and R&D investment.
• Vishay Intertechnology: Vishay is a US-headquartered global passive component manufacturer with an extensive film capacitor line (including Roederstein and BCcomponents heritage brands) serving industrial, automotive, military, and renewable energy applications — a comparable specialty/passive component peer with greater scale and broader product breadth.
• KYOCERA AVX Components: KYOCERA AVX (formerly AVX) is a major passive component manufacturer with film capacitor products serving automotive, industrial, military, and consumer markets — a comparable peer in specialty film capacitors with significantly larger global manufacturing footprint and broader product breadth.
• Murata Manufacturing Co., Ltd. Murata is the global MLCC leader and a strategic partner of ASC's parent Shizuki Electric via the joint Murata Shizuki FC Solutions JV and the 2024 FH-series high-temperature film capacitor co-development — directly comparable in film capacitor technology, with significantly broader portfolio and channel reach.
• KEMET (Yageo): KEMET, now part of Yageo, is a major global capacitor manufacturer with strong film capacitor offerings for industrial, automotive, and power electronics applications — a comparable peer in the film capacitor category, with broader portfolio and substantially greater scale.
• Panasonic Industry (Passive Components): Panasonic Industry manufactures a broad range of film capacitors and other passive components for automotive, industrial, consumer electronics, and renewable energy applications — a comparable peer in film capacitor manufacturing with substantially greater scale and broader product portfolio.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks3 records

Key highlights7 records

Customer concentration

• Facebookfacebook.com/profile.php?id=100063997211166
• LinkedInlinkedin.com/company/american-shizuki-corporation
• Xx.com/ASCCapacitors

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Subsidiaries7 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about ASC Capacitors