What Hivolt Capacitors does

Hivolt Capacitors is a Northern Ireland-based specialty manufacturer of custom-built high-voltage capacitors, founded in 1967 (originally as Plastic Capacitors) and operating today from a purpose-built facility in Derry under the ownership of discoverIE Group plc, which acquired the company in 2024. The company designs and manufactures six distinct capacitor ranges — PFN (Pulse Forming Networks), PMR (tinplate hermetically sealed), PMW (heavy steel welded), PPR (rectangular polypropylene case), TPM (resin-bonded paper tube), and TLC (robust paper tube) — all built on a proprietary mixed dielectric technology using polyester or polypropylene film, capacitor paper, and aluminium foil wound construction, impregnated with highly refined mineral oil and hermetically sealed for high-voltage operation spanning 200Vdc to 300kVdc. The product portfolio targets high-reliability, high-mix, low-volume applications.

The business model is direct enterprise field sales into five vertical segments: medical (80% of products, including X-ray, MRI, CT, radiotherapy, and lithotripsy), aerospace, defence, scientific research, and industrial power systems. All manufacturing is performed in-house, encompassing winding, impregnation, and 100% inspection and testing, with bespoke design collaboration from concept through manufacture. Customers are global OEMs and system integrators including Elekta, Vishay, Hitek Power, Gulmay, Cambridge Vacuum Engineering, Baur, Guth GmbH, and Healthtronics. Pricing is not publicly disclosed; transactions are handled through direct sales engagement. The company holds ISO 9001 (1991) and ISO 14001 (2003) certifications and is currently executing a 2025 capital investment program including new building, advanced winding/impregnation facilities, and additional skilled staff.

Name

Hivolt Capacitors

Legal name

Hivolt Capacitors Ltd

Website

https://hivoltcapacitors.com

Company type

Private

Founded year

1967

Operating status

Operating

Headcount range

11–50 employees

Short description

Hivolt Capacitors is a Northern Ireland-based specialist manufacturer of custom-built high-voltage capacitors, serving medical (80% of products), aerospace, defence, scientific research, and industrial power OEMs worldwide with bespoke solutions since 1967.

Ownership category

akta.pro rank

Product category

High-Voltage Capacitors

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

• High voltage capacitors
• Pulse power capacitors
• Film dielectric capacitors
• Capacitor manufacturing
• Energy storage capacitors

Headquarters

HQ city

Londonderry

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Technology or R&D

Revenue model

1. High-Voltage Capacitor Sales: Hivolt Capacitors generates revenue through the manufacture and sale of custom-built high-voltage capacitors. The company offers both standard product ranges and bespoke solutions, serving high-reliability, high-mix, low-volume applications across medical, aerospace, defence, scientific research, and industrial power sectors. Products are sold as one-time hardware purchases with custom specifications.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels5 records

Core offering

Hivolt Capacitors designs and manufactures high-voltage capacitors used in pulsed power and energy discharge applications. The product portfolio spans six ranges — PFN, PMR, PMW, PPR, TPM, and TLC — built on proprietary mixed dielectric technology using polyester/polypropylene film, capacitor paper, aluminium foil, and mineral oil impregnation. The company supplies custom-engineered capacitor solutions to medical imaging, aerospace, defence, scientific research, and industrial power systems customers.

Product overview

Hivolt Capacitors specializes in the design and manufacture of custom-built high-voltage capacitors for high-reliability, high-mix, low-volume applications. Their product portfolio consists of six distinct capacitor ranges: PFN (Pulse Forming Networks) for square wave pulse generation; PMR (hermetically sealed tinplate cans); PMW (heavy steel welded containers); PPR (rectangular polypropylene cases); TPM (synthetic resin bonded paper tubes); and TLC (robust paper tube variant with M6 terminals). All capacitors utilize mixed dielectric technology with polyester or polypropylene film, paper, and aluminium foil wound construction, impregnated with non-toxic highly refined mineral oil. The company serves sectors including medical (radiotherapy, X-ray, MRI), aerospace, defence, scientific research, and industrial power systems.

Differentiator

Problem solved

Functional benefit

Products and services

• PFN Range Capacitors

Quantifiable outcome

• Life expectancy of 50,000 hours at 65°C for all capacitor ranges

Named customers9 records

Segments5 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• AVX Corporation: Yageo-owned passive component manufacturer producing film, ceramic, and tantalum capacitors with strong positions in medical imaging, military, and aerospace. Overlaps with Hivolt in custom high-voltage DC and pulse capacitors.
• Würth Elektronik: German passive component manufacturer offering a wide portfolio of capacitors including film capacitors used in industrial, medical, and power electronics. Overlaps with Hivolt in custom film capacitor solutions.
• Vishay Intertechnology: Global manufacturer of discrete semiconductors and passive components including a broad range of film, ceramic, and electrolytic capacitors. Vishay is both a named Hivolt customer (Vishay GmbH) and the dominant incumbent in the wider capacitor market, with overlapping high-voltage DC and pulse capacitor ranges.
• KEMET (Yageo): Yageo subsidiary and major capacitor manufacturer offering film, ceramic, tantalum, and electrolytic capacitors for medical, aerospace, defence, and industrial customers. Competes with Hivolt in high-reliability custom and standard capacitor segments.
• EPCOS: TDK group brand focused on capacitors, inductors, surge arresters, and power capacitors for industrial, medical, and energy markets. Direct competitor in high-voltage film and power capacitors.
• TDK Corporation: Major Japanese passive component manufacturer, parent of EPCOS, producing film, ceramic, and electrolytic capacitors for industrial, automotive, and medical applications. Overlaps with Hivolt in high-voltage DC and pulse forming capacitors.

Direct peers

• Dearborn Electronics: Specialist manufacturer of high-voltage capacitors for medical imaging, military, and industrial applications. Direct niche competitor in custom high-voltage DC and pulse capacitors.
• Stangenes Industries: US manufacturer of high-voltage and pulsed-power capacitors and inductors for medical (MRI, lithotripsy), defence, and scientific applications. Strong niche peer overlap with Hivolt's bespoke high-voltage designs.
• New Zealand Capacitors (NZC): Specialist high-voltage film capacitor manufacturer serving pulsed power, medical, and industrial markets globally. Closest small-scale direct peer to Hivolt in custom-built high-voltage capacitor solutions.
• Cornell Dubilier (Knowles): US specialist in high-energy and high-voltage film capacitors for medical imaging, military, and industrial power. Closest direct peer to Hivolt in custom-built high-reliability capacitors for similar end applications.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/hivolt-capacitors-limited

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

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 Hivolt Capacitors