Tridelta Meidensha

What Tridelta Meidensha does

Tridelta Meidensha GmbH is a German specialist manufacturer of metal oxide surge arresters (MOSA) headquartered in Hermsdorf, Thuringia. Founded in 1889 as an insulator producer and focused on surge arresters since 1960, the company has been a wholly-owned subsidiary of Japan's Meidensha Corporation since 2015 and operates as the Meiden Group's primary manufacturing and development center for surge protection. With 51-100 employees, Tridelta Meidensha produces arresters for system voltages from 1 kV to 800 kV across both AC and DC applications, using proprietary zinc oxide (ZnO) varistor technology, filament cage ("Cage Arrester") construction, and HTV silicone rubber injection molding. The product portfolio spans high voltage porcelain and silicone-housed arresters (SB, SBKW, SBKC, SBKT), medium voltage arresters up to 51 kV, DC voltage arresters for railway rolling stock and catenary systems (SB-B, DC-B, DC-C classes), and a monitoring line including the smartCOUNT condition monitoring device, DCC 2/DCC-ML 2 surge counters, and control spark gaps.

The company sells exclusively B2B to utilities, transmission/distribution system operators, power generation companies, railway operators, and industrial customers, with revenue generated through quote-based hardware sales via a worldwide agent network and direct sales engineers. Products are shipped ex-works Germany with standard 30-day payment terms and short 4-week lead times. The offering is differentiated by an in-house high voltage test laboratory (1.2 MV impulse generator, 600 kV AC transformer, 100 kA surge generator, long-wave and weather-aging facilities) and by multi-standard certification (IEC 60099-4, IEC 62484-1, IEC 61373, EN 45545-2, ISO 9001/14001/45001). Tridelta Meidensha sells into more than 120 countries, with active market development in North America (via Composite Power channel partnership) and continued presence in Europe and Asia-Pacific. The business model is capital-light on a subscription or services basis: revenue is hardware-driven, with the smartCOUNT monitoring product adding a small recurring-adjacent, predictive maintenance revenue layer.

Name

Tridelta Meidensha

Legal name

Tridelta Meidensha GmbH

Website

https://tridelta-meidensha.de

Company type

Private

Founded year

1889

Operating status

Operating

Headcount range

51–100 employees

Short description

Tridelta Meidensha GmbH designs and manufactures metal oxide surge arresters (1 kV to 800 kV, AC and DC) for electric utilities, railway operators, and power generation companies, sold globally through a worldwide agent network and direct sales.

Ownership category

akta.pro rank

Product category

Electrical Surge Protection Equipment

NAICS

Switchgear and Switchboard Apparatus Manufacturing (335313), Electrical Equipment Manufacturing (3353), Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals (334515)

SIC

Switchgear & Switchboard Apparatus (3613), Electrical Industrial Apparatus (3620)

akta.pro primary industry

Busbars, Insulators, Surge Arresters & Substation Primary Hardware (EUADACAI)

akta.pro secondary industries

Varistors & Surge Protection (MOV/TVS-like passive protectors/GDT) (HDAHANAI), Circuit Protection Devices (MCBs, MCCBs, ACBs, fuses, RCD/GFCI, surge protection) (IMAGAEAB)

Keywords

• Metal oxide surge arresters
• High voltage protection
• Overvoltage protection devices
• DC railway arresters
• Arrester monitoring systems

Headquarters

HQ city

Hermsdorf

HQ country

Germany

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Surge Arrester Sales: Direct sales of metal oxide surge arresters for medium and high voltage applications. Products include porcelain and silicone housed arresters for AC and DC systems ranging from 1 kV to 800 kV. Revenue generated from standard product catalog as well as custom application solutions.
2. Monitoring Equipment: Sales of monitoring solutions including smartCOUNT intelligent monitoring devices, DCC surge counters with/without leakage current measurement, and control spark gaps for condition assessment of surge arresters.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Tridelta Meidensha manufactures metal oxide surge arresters (MOSA) for overvoltage protection in electrical systems, covering system voltages from 1 kV to 800 kV for AC and DC applications. The product portfolio includes high voltage silicone and porcelain housed arresters, medium voltage arresters up to 51 kV, DC voltage arresters for railway vehicles and overhead lines, and condition monitoring devices such as the smartCOUNT system, DCC surge counters, and control spark gaps. All products are produced at the company's Hermsdorf, Germany facility and supported by an in-house high voltage test laboratory.

Product overview

Tridelta Meidensha produces metal oxide surge arresters for electrical system protection, offering a comprehensive portfolio spanning system voltages from 1 kV to 800 kV. The core product lines include high voltage silicone arresters (SBKW, SBKC, SBKT series), high voltage porcelain arresters (SB series), medium voltage arresters for industrial applications up to 51 kV, and DC voltage arresters (SB-B, SBKW DC-B, SBKW DC-C) specifically designed for railway vehicles, trolleybuses, and overhead line systems. The portfolio is complemented by monitoring solutions including the smartCOUNT intelligent condition monitoring device, DCC 2/DCC-ML 2 surge counters, and Kontrollfunkenstecke (control spark gaps) for arrester diagnostics. The company also develops custom arrester solutions for customer-specific applications. All products are manufactured in Hermsdorf, Germany, and are supported by the company's own high voltage testing laboratory certified to IEC 60099-4.

Differentiator

Problem solved

Functional benefit

Brands

• smartCOUNT: Intelligent monitoring device for surge arresters that measures leakage current and pulse currents, generates trend curves, and provides condition monitoring via NFC-enabled Android app. Launched in 2020.
• DCC Series

Products and services

• SBKW High Voltage Silicone Arresters Metal oxide surge arresters in silicone housings for high voltage applications up to 800 kV, providing protection for stations, lines, HVDC/SVC applications with high long-term reliability. Sold to utilities and transmission system operators.
• SBKC High Voltage Cage Arrester Cage-design surge arresters with silicone housing for high voltage applications, featuring lightweight structure combined with high mechanical strength using filament cage technology. Sold to utilities requiring high mechanical resilience.
• SB High Voltage Porcelain Arresters Metal oxide surge arresters in porcelain housings for high voltage applications, combining proven technology with latest standards for extreme environmental conditions. Sold to utilities and substations.
• SBKW Medium Voltage Arresters Silicone housed surge arresters up to 51 kV for protection of transformers, switchgear, and cable terminations in indoor or outdoor applications. Sold to industrial customers and distribution network operators.
• SBKW DC-B / DC-C Railway Voltage Arresters DC voltage surge arresters up to 4.5-4.8 kV DC for railway vehicles, trolleybuses, catenary systems, and rectifier stations. Class DC-B (10 kA nominal discharge) and Class DC-C (20 kA) variants available. Sold to railway operators and rolling stock manufacturers.
• smartCOUNT Monitoring System Intelligent monitoring device for surge arrester condition monitoring. Automatically measures leakage current and impulse currents, generates trend curves displayed via web interface, and detects typical arrester failure symptoms using NFC-enabled Android app. Sold to grid operators and asset managers for predictive maintenance.
• DCC 2 & DCC-ML 2 Surge Counters Impulse counters with 6-digit display for arrester monitoring. DCC-ML2 variant includes leakage current measurement (0-50 mA). Devices require no auxiliary voltage supply and are designed for earth line installation. Sold to grid operators and utilities.
• Control Spark Gaps (Kontrollfunkenstrecke) Monitoring spark gaps connected in the earth line of surge arresters. Characteristic markings on electrodes allow qualitative and quantitative analysis of discharge processes caused by lightning or switching overvoltages. Sold to grid operators and utilities.
• Custom Development Projects Customer-specific surge arrester solutions developed beyond the standard product range to meet unique application requirements. Sold to utilities, railway operators, and industrial customers with specialized needs.

Quantifiable outcome

• Successfully deployed in over 120 countries worldwide
• +2 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability4 records

Feature4 records

Partnerships

Three partnerships are on record, tiered minor and core.

• Composite PowerminorChannel Partner/ Reseller/ Distributor · 1 January 2025Canadian sales partner for the North American market. Tridelta Meidensha and Composite Power are participating together at CIGRE International Symposium 2025 in Montreal, focused on the resilience of future energy systems.
• Meiden Group (Meidensha Corporation)coreStrategic or Co-development Partner · 1 January 2015Meiden Group is the parent company of Tridelta Meidensha. Tridelta became part of the international Meiden Group in 2015 and now trades as Tridelta Meidensha GmbH. Meidensha pioneered the world's first metal oxide surge arrester (MOSA) in 1975 and developed metal oxide blocks for surge arresters in 1972. The group provides R&D support and shared technology heritage. Managing Directors Atsushi Sawada (from Meiden) and Stephan Hilmer lead the company.
• Gera-Eisenach Cooperative State University (Duale Hochschule Gera-Eisenach)minorStrategic or Co-development PartnerPartnership for dual study programs combining theory at the university with practical experience at Tridelta Meidensha. Company offers practical partner support for bachelor's courses in electrical engineering and practical computer science/business informatics. Also supervises student research projects.

Scale indicators4 records

Recent moves12 records

Expansion highlights6 records

Broad incumbents

• ABB: ABB is a broad incumbent in power transmission and distribution, historically one of the leading surge arrester manufacturers through its former Power Grids business (now part of Hitachi Energy). It competes with Tridelta across voltage classes and customer segments globally.
• Siemens Energy: Siemens Energy is a broad incumbent that manufactures surge arresters as part of its portfolio of transformers, switchgear, and grid technology. It serves the same high voltage utility and railway customers as Tridelta, but with significantly broader scope and global scale.
• Eaton: Eaton is a broad incumbent in electrical power management with surge protection offerings integrated into its broader portfolio of switchgear and distribution equipment. It targets the same utility and industrial customers as Tridelta with greater scale but less surge arrester specialization.
• Schneider Electric: Schneider Electric offers surge protection devices across its EcoStruxure power management platform. While broader in scope, it competes with Tridelta in medium voltage surge protection applications for industrial and commercial customers globally.

Direct peers

• CG Power and Industrial Solutions: CG Power (formerly Crompton Greaves) has a dedicated surge arrester business unit manufacturing metal oxide arresters for utilities and railways. It is a direct competitor particularly in emerging markets and shares Tridelta's voltage class coverage.
• Hitachi Energy: Hitachi Energy (formed from ABB Power Grids acquisition) is a direct competitor in metal oxide surge arresters for transmission and distribution networks. It offers the highest voltage range arresters globally and shares Tridelta's customer base of utilities and railway operators, making it the most direct comparison.
• Hubbell Power Systems: Hubbell Power Systems manufactures metal oxide surge arresters and related protection products for utilities and railway applications. It directly competes with Tridelta in North American and European markets with comparable product specifications and customer focus.
• Streamer Electric: Streamer Electric is a specialized manufacturer of metal oxide surge arresters and current transformers, serving utilities and railway operators worldwide. It is a direct niche competitor comparable to Tridelta in scale and product specialization.
• ZOTUP: ZOTUP is a specialized manufacturer of surge arresters for medium and high voltage applications, headquartered in Italy. It competes directly with Tridelta in European markets with comparable voltage class coverage and customer focus on utilities and railways.

Emerging players

• LS Electric: LS Electric (formerly LS Industrial Systems) is a Korean manufacturer offering surge arresters as part of its broader power equipment portfolio. It is an emerging competitor in the surge protection market, particularly active in Asian and Middle Eastern markets.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks7 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/tridelta-meidensha-gmbh
• Facebookfacebook.com/trideltagermany

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 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 Tridelta Meidensha