Rubycon
Rubycon Corporation is a Japanese capacitor and power-supply manufacturer (TSE:4989, founded 1952) producing aluminum electrolytic, conductive polymer hybrid, polymer multi-layer (PMLCAP), and film capacitors for automotive, industrial, consumer electronics, and aerospace customers across more than 14 countries.
- Company typePublic
- Founded1952
- HeadquartersNagano, Japan
- Headcount1,001–5,000
- GTM typeB2B
- OfferingHardware or Manufacturing
What Rubycon does
Rubycon Corporation is a Japanese, Tokyo Stock Exchange-listed (TSE:4989) manufacturer of capacitors and power supplies, founded in 1952 and headquartered in Ina City, Nagano Prefecture. The company designs and produces aluminum electrolytic capacitors (chip, radial lead, and snap-in form factors), conductive polymer aluminum solid electrolytic capacitors in hybrid and standard variants, polymer multi-layer capacitors (PMLCAP) using vacuum-deposited dielectric films, film capacitors, and switching power supply units, serving automotive, industrial, consumer electronics, and aerospace customers across more than 14 countries through owned sales branches, wholly-owned regional subsidiaries, and authorized distributors.
The company's technical differentiation rests on proprietary hybrid polymer chemistry that combines conductive polymer with functional liquid to deliver low ESR, high ripple current, and high-temperature stability (up to 150°C), as well as the PMLCAP platform whose miniaturization capability was validated by selection into NASA's InSight Mars mission seismometer. Manufacturing is concentrated across four Japanese factories (Akita, Fukushima, Niigata, and Matsukawa) plus an Indonesian facility, with AEC-Q200, IATF16949, ISO 9001, ISO 14001, ISO 45001, and TISAX certifications supporting qualification into automotive and industrial OEM supply chains.
Rubycon generates revenue through direct hardware sales of electronic components on a quote-based B2B model, with no public pricing disclosed. The customer base exceeds 5,000 companies globally, the automotive/EV segment is described as primary, and group headcount stands at approximately 2,750. Go-to-market is sales-led via domestic and international sales branches, supplemented by distributor channels, major industry trade shows (AUTOMOTIVE WORLD, CAR-ELE JAPAN, POWER SYSTEM JAPAN), and an English/Chinese/Japanese corporate website offering parametric product search and downloadable SPICE models for circuit simulation.
Rubycon firmographics
Firmographics- Name
- Rubycon
- Legal name
- ルビコン株式会社 (Rubycon Corporation)
- Website
- https://rubycon.co.jp
- Company type
- Public
- Founded year
- 1952
- Operating status
- Operating
- Headcount range
- 1,001–5,000 employees
- Short description
- Rubycon Corporation is a Japanese capacitor and power-supply manufacturer (TSE:4989, founded 1952) producing aluminum electrolytic, conductive polymer hybrid, polymer multi-layer (PMLCAP), and film capacitors for automotive, industrial, consumer electronics, and aerospace customers across more than 14 countries.
- Ownership category
- akta.pro rank
Rubycon industry classification
Industry- Product category
- Passive Electronic Components (Aluminum Electrolytic Capacitors)
- NAICS
- Capacitor, Resistor, Coil, Transformer, and Other Inductor Manufacturing (334416)
- SIC
- Electronic Components & Accessories (3670)
- akta.pro primary industry
- Capacitors (Ceramic/Film/Electrolytic/Tantalum/Supercapacitors) (HDAHANAB)
Keywords
Where Rubycon is headquartered
LocationHeadquarters
- HQ city
- Nagano
- HQ country
- Japan
- HQ region
- Asia
Offices22 records
Markets served
Rubycon business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure
Revenue model
- Electronic Components Sales: Sale of aluminum electrolytic capacitors, conductive polymer capacitors, film capacitors, and power supply units to electronics manufacturers worldwide. Products are sold directly through sales branches and via distributor networks.
Go-to-market motion1 record
Distribution channels3 records
Marketing channels4 records
Rubycon product offering
Product offeringCore offering
Rubycon develops, designs, manufactures, and sells a broad portfolio of capacitors — aluminum electrolytic capacitors (chip, radial lead, snap-in), conductive polymer hybrid aluminum solid electrolytic capacitors (PZ-CAP), polymer multi-layer capacitors (PMLCAP), and film capacitors — together with in-house switching power supply units. Products are sold to electronics manufacturers globally for automotive, industrial, consumer electronics, and aerospace/satellite applications.
Product overview
Rubycon is a comprehensive capacitor manufacturer offering a diverse portfolio of aluminum electrolytic capacitors, conductive polymer hybrid capacitors, polymer multi-layer capacitors (PMLCAP), film capacitors, and power supply units. The core product lines include: Conductive Polymer Aluminum Solid Electrolytic Capacitors (Hybrid Type) / PZ-CAP combining polymer technology with functional liquids for low ESR and high reliability; PMLCAP using vacuum-deposited film technology for miniaturization; Chip, Radial Lead, and Snap-in Aluminum Electrolytic Capacitors in various temperature and lifetime ratings; Film Capacitors including power film types for EV/HEV applications; and Power Supply Units. The portfolio is organized by product type with multiple series variants targeting specific applications including automotive (AEC-Q200 compliant), industrial, power supply, and space/aerospace markets. Rubycon serves diverse markets from consumer electronics to electric vehicles and space exploration.
Differentiator
Problem solved
Functional benefit
Products and services
- Conductive Polymer Aluminum Solid Electrolytic Capacitors (Hybrid Type) / PZ-CAP Surface-mount and lead-type conductive polymer hybrid aluminum electrolytic capacitors combining conductive polymer with proprietary functional liquid for very low ESR, high ripple current capability, stable frequency characteristics from cryogenic to high temperatures, and minimal ESR change over time. Available in temperature ratings from 105°C to 150°C. Used in automotive ECU, power supply, server, and consumer electronics applications.
- Polymer Multi-Layer Capacitors (PMLCAP) Film capacitors with electrodes and dielectrics formed by vacuum deposition technology, achieving significant miniaturization compared to conventional film capacitors. Features excellent frequency characteristics and temperature stability. Targeted at true wireless stereo earphones, industrial power supply boards, and space/aerospace electronic instruments.
- Chip Aluminum Electrolytic Capacitors Surface-mount aluminum electrolytic capacitors available in various temperature ratings (105°C to 150°C) and lifetimes (1,000 to 8,000 hours). Used in automotive electronics, power supplies, and industrial equipment, including AEC-Q200-compliant automotive variants up to 150°C.
- Radial Lead Aluminum Electrolytic Capacitors Lead-type aluminum electrolytic capacitors for through-hole mounting, available in multiple series for power-input (with 400V-500V ratings), power-output, and automotive applications with temperature ratings from 105°C to 150°C.
- Snap-in Aluminum Electrolytic Capacitors Snap-in lead aluminum electrolytic capacitors with high ripple current capability for through-hole mounting, used in power supply applications for inverter DC-link and other high-power circuits. Ultra-miniaturized series available.
- Film Capacitors Film capacitors including power film capacitors for EV/HEV inverter smoothing applications, manufactured by Rubycon Electronics Corporation using proprietary dielectric deposition technology to achieve miniaturization and high performance. Available in various shapes and characteristics.
- Power Supply Units Switching power supply units developed and manufactured in-house by Rubycon, available in standard and custom configurations for various industrial, automotive, and consumer electronics applications.
Quantifiable outcome
- 150°C operating temperature capability for automotive engine compartment applications
- +2 more outcomes
Companies that use Rubycon
Customer profileNamed customers4 records
Segments4 records
Ideal customer profiles4 records
Rubycon technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature4 records
Rubycon partnerships and signals
Strategic signalPartnerships
Four partnerships are on record, tiered minor and core.
- Yachiyo Engineering Co., Ltd.minorRubycon purchases Green Power Certificates from Yachiyo Engineering Co., Ltd., derived from biomass power generation at the Kamiina Wide-Area Union Kamiina Clean Center in Ina City, Nagano Prefecture. This supports Rubycon's commitment to achieving a sustainable society with renewable energy.
- Shinshu UniversityminorRubycon participates in Shinshu University's naming rights program (ネーミングライツ事業), announced June 2026.
- DLR (German Aerospace Center)minorRubycon joined a network related to space utilization of automotive components associated with the strategic partnership between DLR and JAXA, announced May 2026.
- Authorized Distributor NetworkcoreRubycon maintains a network of authorized distributors covering North America, Europe, Singapore, and East Asia markets, with downloadable distributor lists available on the company website.
Scale indicators4 records
Recent moves7 records
Expansion highlights5 records
Rubycon competitors and assessment
Company assessmentBroad incumbents
- Yageo Corporation: Taiwanese passive components leader (post-KEMET acquisition) producing MLCCs, resistors, capacitors, and inductors; broad portfolio with significant capacitor overlap, especially in industrial and automotive end markets.
- TDK Corporation: Major Japanese electronic components group with aluminum electrolytic and film capacitor lines alongside broader passive component and battery portfolios; competes in automotive and industrial power electronics markets.
- Panasonic Industry Co., Ltd. Division of Panasonic Group manufacturing aluminum electrolytic capacitors, film capacitors, and other electronic components; broader portfolio and much larger parent gives scale advantages, but overlaps directly in target segments.
- Murata Manufacturing Co., Ltd. Dominant Japanese electronic components manufacturer specializing primarily in MLCCs but with growing presence in specialty capacitors and power electronics; competes with Rubycon in automotive and industrial power applications.
Direct peers
- Nichicon Corporation: Japanese aluminum electrolytic capacitor manufacturer with broad portfolio (chip, radial, snap-in, conductive polymer hybrid, film) serving automotive, industrial, and consumer electronics. Direct competitor with overlapping technology and customer base.
- CapXon International Co., Ltd. Taiwanese manufacturer of aluminum electrolytic capacitors serving consumer electronics, industrial, and automotive markets; comparable product portfolio targeting similar OEM customers at competitive price points.
- Vishay Intertechnology, Inc. US-headquartered global manufacturer of discrete semiconductors and passive components including aluminum electrolytic capacitors; competes directly in industrial, automotive, and power supply segments.
- Nippon Chemi-Con Corporation: One of the world's largest aluminum electrolytic capacitor manufacturers; Japanese-headquartered with global production and direct overlap with Rubycon in automotive and industrial segments.
- Würth Elektronik eiSos: German passive components manufacturer with strong aluminum electrolytic, polymer, and film capacitor lines; competes with Rubycon in European automotive and industrial accounts via direct sales and broad-line catalog distribution.
- Jianghai Capacitor Co., Ltd. Chinese aluminum electrolytic capacitor manufacturer with growing global presence in industrial, renewable energy, and automotive applications; cost-competitive competitor that pressures pricing in volume segments.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks5 records
Key highlights7 records
Customer concentration
Rubycon social profiles
Digital presenceRubycon compliance and trust
Trust signalCompliance6 records
Rubycon financial estimates
Financial estimateRevenue estimate
Valuation estimate
Rubycon leadership team
Management profileNumber of profiles
Profiles6 records
Rubycon subsidiaries and ownership
Company hierarchySubsidiaries11 records
Rubycon funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Rubycon 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 Rubycon
What does Rubycon do?
Rubycon develops, designs, manufactures, and sells a broad portfolio of capacitors — aluminum electrolytic capacitors (chip, radial lead, snap-in), conductive polymer hybrid aluminum solid electrolytic capacitors (PZ-CAP), polymer multi-layer capacitors (PMLCAP), and film capacitors — together with in-house switching power supply units. Products are sold to electronics manufacturers globally for automotive, industrial, consumer electronics, and aerospace/satellite applications.
Is Rubycon a public or private company?
Rubycon is a public company. It is classified as public and is currently operating.
When was Rubycon founded?
Rubycon was founded in 1952. It employs 1,001 to 5,000 people.
Where is Rubycon based?
Rubycon is headquartered in Nagano, Japan, in the Asia region.
How does Rubycon make money?
One revenue line is on record: electronic Components Sales.
Who are Rubycon's main competitors?
Broad incumbents on record are Yageo Corporation, TDK Corporation, Panasonic Industry Co., Ltd. and Murata Manufacturing Co., Ltd.. Direct peers are Nichicon Corporation, CapXon International Co., Ltd., Vishay Intertechnology, Inc., Nippon Chemi-Con Corporation, Würth Elektronik eiSos and Jianghai Capacitor Co., Ltd..
Does Rubycon have an API?
No public API is recorded for Rubycon.
What industry is Rubycon in?
Rubycon's product category is Passive Electronic Components (Aluminum Electrolytic Capacitors). Its primary akta.pro industry code is HDAHANAB, Capacitors (Ceramic/Film/Electrolytic/Tantalum/Supercapacitors). Its NAICS code is 334416 and its SIC code is 3670.