About Us
Leaders in High-Voltage Capacitor Engineering
since 1967
Founded in 1967, Hivolt Capacitors has a long-standing reputation for excellence in high-reliability capacitor design and manufacturing. Originally established as Plastic Capacitors, the company began its journey in partnership with Plastic Capacitors Inc. of Chicago, Illinois, and started production at its present Derry location in 1968.
In 1979, Hivolt Capacitors became an independent company under its current name and has continued to grow through ongoing innovation and commitment to quality. The company achieved ISO9001 certification in 1991 and ISO14001 certification in 2003, reinforcing its dedication to quality management and environmental responsibility.
In 2024, Hivolt Capacitors was acquired by discoverIE Group plc, a £500m UK based organisation with over 30 operating companies – strengthening its global reach and resources.
Looking to the future, 2025 marks a major company wide investment, including a new building, advanced winding and impregnation facilities, additional skilled staff, and a refreshed brand and website.
Hivolt Capacitors is proud to part of the UK with manufacturing in Northern Ireland, providing customised capacitor solutions for high reliability, high-mix, low-volume applications
Our Expertise
Design
Innovative capacitor designs tailored to meet the most demanding applications, delivering exceptional reliability, efficiency, and performance even in challenging environments.
Engineering
Driven by expert engineering, our solutions deliver unmatched precision, superior performance, and long-term reliability that stand the test of time.
Testing
Manufacturing
Quality Assurance
Rigorous quality processes ensure dependable performance in every capacitor, from material selection to final testing, guaranteeing consistency, reliability, and compliance with the highest industry standards.
Global Reach & Facilities
Hivolt Capacitors operates from a purpose built facility in Northern Ireland, equipped with modern and dedicated manufacturing, testing, and design capabilities. Our strategic location and robust logistics network has enabled us to deliver precision engineered capacitors to customers worldwide -on time and to exact specifications. By combining modern production technology, expertise in engineering, and close collaboration with our global partners, we maintain consistent quality and dependable performance across all markets we serve.
The acquisition by discoverIE Group in 2024 has further strengthened our capabilities, providing the resources and support to drive the next phase of our growth journey.
Key Strengths
80% of all products support Medical Application
High reliability, custom solutions
Environmentally responsible production
Decades of engineering expertise
100% owned by discoverIE Group Plc providing global support, future growth and stability
Accreditations
ISO 14001
Our commitment to sustainability and the environment is driven by the International Standard in Environmental Management Systems BS EN ISO 14001.
ISO 9001
Our commitment to sustainability and the environment is driven by the International Standard in Quality Management Systems BS EN ISO 9001.
Hivolt Capacitors is a discoverIE Group company, delivering high-voltage capacitor solutions backed by global engineering expertise.