Terasaki

What Terasaki does

Terasaki Electric (Europe) Ltd. is the Glasgow-headquartered European arm of Japan's Terasaki Electric Co. Ltd. (founded 1923, JASDAQ-listed), operating as a specialist manufacturer of low-voltage circuit protection products for industrial, marine, and commercial building customers. The company was established in Scotland in 1971/72 as the first Scottish/Japanese joint venture and now runs the group's main EMEA/Americas assembly, testing, and manufacturing facility in Clydebank, supported by wholly-owned subsidiaries in Spain (Barcelona), Italy (Milan), and Sweden (Saltsjö-Boo), and a distributor network spanning more than 50 countries. Its core portfolio centres on the TemPower 2 Air Circuit Breaker family (160A to 6300A) and the TemBreak 2 Moulded Case Circuit Breaker family (50A to 1600A), with the TemBreak 2 Lite, TemBreak 2 CBR residual-current variants, the new TemPower PRO and TemBreak PRO compact ranges (unveiled in 2025), RESILIENCE panel boards, GroupStak group-mounted switchboards, TemContact 2 contactors, TemProtect earth-leakage relays, and Power Factor Correction modules. Differentiated technology includes the proprietary Double Break contact system for fast short-circuit interruption, an active temperature-sensing system for overheating pre-alarm, the 3C continuous condition monitoring platform, and remote racking/controllers for arc-flash safety, with stated Mean Time Between Failures of 27.4 years for ACBs and 26.5 years for MCCBs.

The business model is predominantly direct hardware sales to specification-driven enterprise and infrastructure customers, supplemented by a Direct Response 24/7 service division for fault diagnosis, repair, and retrofit. Pricing is quote-based rather than publicly listed, although a 220-page price list (PDF and Excel) is downloadable and the TemCurve selectivity software is offered free of charge as a specification tool. Customers include EDF and Vattenfall nuclear stations, Heathrow Terminal 5, BHP Billiton and other mining operators, Telehouse data centres, Rete Ferroviaria Italiana, ScottishPower's Whitelee Wind Farm, NYK's LNG-fuelled Sakura Leader, and the London EV bus depot programme, supported by UVDB Verify B2 nuclear pre-qualification, ISO 9001:2015, ISO 45001:2018, and SafeContractor accreditation. Revenue is generated across five streams: low-voltage circuit breaker sales, switchgear products (panel/distribution boards, PFC, contactors), retrofit modernisation services, Direct Response service contracts, and lifetime spare parts and accessories. The company claims worldwide market leadership in marine switchgear and is positioning for growth in renewables, EV infrastructure, and compact next-generation breaker formats while formally committing to net zero by 2050 under the UN Race to Zero campaign.

Name

Terasaki

Legal name

Terasaki Electric (Europe) Ltd.

Website

https://terasaki.co.uk

Company type

Private

Founded year

1923

Operating status

Operating

Headcount range

101–250 employees

Short description

Terasaki Electric (Europe) Ltd. is a Glasgow-based specialist manufacturer of low-voltage circuit breakers, supplying TemPower ACBs (160A-6300A) and TemBreak MCCBs (50A-1600A) plus panel boards and switchgear to industrial, marine, nuclear, data centre, and commercial building customers across more than 50 countries.

Ownership category

akta.pro rank

Product category

Low-Voltage Circuit Protection Equipment

NAICS

Switchgear and Switchboard Apparatus Manufacturing (335313), Relay and Industrial Control Manufacturing (335314)

SIC

Switchgear & Switchboard Apparatus (3613)

akta.pro primary industry

Circuit Breakers, Disconnectors, Earthing Switches & Switchgear Components (EUADACAH)

akta.pro secondary industries

Protection, Control & Monitoring (Relays, RTUs, Fault Recorders, Condition Monitoring) (IMAGAAAD), Testing, Commissioning, Maintenance & Retrofit/Modernization (Substations/Switchgear) (EUADACAL), Switchgear, Breaker & Buswork Retrofit Services (AIS/GIS) (EUAEALAF)

Keywords

• Low-voltage circuit breakers
• Air circuit breakers
• Moulded case circuit breakers
• Marine switchgear
• Electrical protection systems

Headquarters

HQ city

Glasgow

HQ country

United Kingdom

HQ region

Europe

Offices5 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Low-Voltage Circuit Breaker Sales: Primary revenue from manufacturing and selling low-voltage circuit breakers including Air Circuit Breakers (ACBs) and Moulded Case Circuit Breakers (MCCBs) for industrial, marine and commercial applications.
2. Switchgear Products: Revenue from panel boards, distribution boards, power factor correction equipment, contactors, and related switchgear accessories.
3. Retrofit Solutions: Retrofit ACB and MCCB solutions for upgrading ageing switchgear, providing modernization services reusing existing static components.
4. Direct Response Service: 24-hour emergency service, fault diagnosis, circuit breaker maintenance and repair services.
5. Spare Parts and Accessories: Replacement parts, protection relays, and accessories designed to last the lifetime of the breaker.

Pricing tiers

Go-to-market motion3 records

Distribution channels6 records

Marketing channels6 records

Core offering

Terasaki manufactures and supplies low-voltage circuit breakers and associated protection, control, and system products for electrical energy distribution. Its core portfolio includes Air Circuit Breakers (TemPower 2, 160A–6300A), Moulded Case Circuit Breakers (TemBreak 2, 50A–1600A), panel boards, contactors, earth leakage relays, and power factor correction equipment, sold to industrial, marine, and commercial building projects. The company also offers retrofit solutions, selectivity software (TemCurve Lite), and a 24-hour Direct Response service division for fault diagnosis, maintenance, and repair.

Product overview

Terasaki is a world-class specialist in innovative circuit protection, control and system products for electrical energy distribution. The company supplies low-voltage circuit breakers for industrial, marine and commercial building projects. The core product portfolio centers on two main circuit breaker families: the TemPower 2 Air Circuit Breakers (ACBs) ranging from 160A to 6300A, and the TemBreak 2 Moulded Case Circuit Breakers (MCCBs) spanning 50A to 1600A. These are complemented by the TemBreak 2 Lite compact variant and TemBreak 2 CBR with residual current protection. Supporting products include RESILIENCE and GroupStak panel boards for electrical distribution, TemContact 2 magnetic contactors, TemProtect earth leakage relays, and Power Factor Correction equipment. Software tools include TemCurve Lite selectivity software for circuit breaker coordination. Services encompass 24/7 Direct Response support, retrofit solutions for obsolete switchgear, and 3C overheating protection monitoring. The company recently announced new TemPower PRO and TemBreak PRO product lines.

Differentiator

Problem solved

Functional benefit

Brands

• TemPower 2: Air Circuit Breakers (ACBs) product range
• TemBreak 2
• RESILIENCE
• GroupStak
• TemContact 2
• TemProtect
• TemCurve
• Direct Response

Products and services

• TemPower 2 Air Circuit Breakers Air Circuit Breakers (ACBs) for industrial, marine, and commercial building electrical energy distribution, with current ratings from 160A to 6300A. Features Double Break Contact System and design with isolating clusters and racking mechanism on the ACB body for shorter mean time to repair.
• TemBreak 2 Moulded Case Circuit Breakers Moulded Case Circuit Breakers (MCCBs) for safety and protection, available in frame sizes from 50A to 1600A with various breaking capacities. Range extended in 2016 with new models from 800A to 1600A, including 1000A model in same frame size as XS800 and 125kA/200kA breakers in 800A frame.
• TemBreak 2 Lite MCCBs Compact MCCB range offering space and cost savings for applications up to 250A and 40kA. Includes Space Saving MCCBs up to 250A introduced in 2011.
• TemBreak 2 CBR Circuit Breakers with Residual Current Protection Circuit Breakers with Residual Current Protection providing protection from electric shock, overloads, and short circuits. Available in 125AF, 250AF, and 400AF frame sizes.
• GroupStak Group-Mounted Switchboard Group-mounted switchboard system with outgoing circuits supplied by circuit breakers mounted in a vertical group, ideal for schools, retail, and public buildings. Developed to accept Rayleigh's EasyWire plug and play meters and CTs.
• RESILIENCE Panel Boards Adaptable, high quality panel boards designed for Terasaki's TemBreak 2 and TemBreak 2 Lite ranges. Available in Standard (250A/400A) and Plus (400A/800A) configurations with 25kA to 50kA busbar ratings.
• Power Factor Correction Systems Complete range of products and systems for low, medium, and high voltage power factor correction, including modular cassettes and prefabricated freestanding capacitor banks. UK market only.
• TemContact 2 Magnetic Contactors and Thermal Overload Relays Magnetic contactors and thermal overload relays with current ratings from 6A to 800A in 9 frame sizes, available in 3 or 4 pole versions.
• TemProtect Earth Leakage Protection Relays Earth leakage protection and monitoring devices for industrial and commercial applications, available in DIN Rail, Panel, or base mount versions.
• TemCurve Lite Selectivity Software Free circuit breaker selectivity software for selecting correct circuit breakers and coordinating settings. Multilingual support with DXF and PDF output capabilities. Settings uploadable/downloadable through data link.
• TemPower PRO Air Circuit Breakers New compact Air Circuit Breaker range previewed at Middle East Energy 2025.
• TemBreak PRO Moulded Case Circuit Breakers New compact Moulded Case Circuit Breaker range previewed at Middle East Energy 2025.
• Pro-DB Distribution Boards Type B distribution boards fully type tested with 25kA short circuit rating, available in 125A and 250A versions with multiple outgoing ways.
• TemPower 2 Retrofit ACB Solutions Retrofit solutions for modernizing existing switchgear with new circuit breakers, reusing static components of existing switchboards.
• Direct Response Service Division 24-hour emergency service division providing fault diagnosis, circuit breaker maintenance, repair, and technical support for Terasaki circuit breakers.
• TD3 Miniature Circuit Breakers TD3 range of Miniature Circuit Breakers (MCBs) for low-current protection applications.

Quantifiable outcome

• Mean Time Between Failures (MTBF) for ACBs: 27.4 years
• +3 more outcomes

Named customers28 records

Segments8 records

Ideal customer profiles7 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

Feature10 records

Partnerships

Eleven partnerships are on record, tiered core, strategic and minor.

• Cleaner EV LtdcoreStrategic or Co-development Partner · 11 July 2022Managed scheme design, carried out engineering, procurement, construction, installation and coordination with energy supplier Enel X Way for Abellio London Bus Dawley Road EV Bus Depot project.
• Specialist Switchgear SystemscoreStrategic or Co-development PartnerDesigned and built low voltage distribution equipment for EV bus depot using Terasaki Air and Moulded Case Circuit Breakers.
• MardixstrategicTechnology or IntegrationJoint switchgear testing program resulting in 100kA fault level testing for critical power switchgear systems. Combined Terasaki circuit breakers with Mardix busbar design for space savings up to 40%.
• CUBICstrategicTechnology or IntegrationCooperative type-testing program resulting in one of the world's most compact switchboards certified at up to 100kA. Tests conducted at KEMA and ASTA-certified facilities.
• KatkominorChannel Partner/ Reseller/ DistributorFinnish distributor and exhibition partner for Hannover Messe events.
• Elsteel Techno ModulestrategicTechnology or IntegrationElsteel Techno Module system with Terasaki breakers tested up to 100kA fault level for 16A to 6300A breakers.
• AuditelcoreStrategic or Co-development PartnerCarbon partner to deliver objective of becoming Carbon Neutral with longer-term goal of Net Zero by 2050. Auditel helps develop progressive Carbon Management Strategy.
• NHPstrategicChannel Partner/ Reseller/ DistributorAustralian partner featuring case study with Terasaki AR ACBs at Monash Medical Centre, Melbourne.
• AC/DC DynamicsstrategicChannel Partner/ Reseller/ DistributorSouth African partner hosting video interview series 'Dynamic Discussions' featuring Terasaki Export Area Manager David Wales.
• Al Ghandi TradingstrategicChannel Partner/ Reseller/ DistributorUAE distributor and joint exhibition partner at Middle East Electricity exhibition.
• ANESCOminorChannel Partner/ Reseller/ DistributorTop-rated solar plant developer in UK that has used Terasaki circuit breakers to protect their equipment at 800V AC.

Scale indicators7 records

Recent moves5 records

Expansion highlights6 records

Broad incumbents

• ABB: ABB is a global electrification leader offering a full portfolio of low- and medium-voltage switchgear, circuit breakers, and protection relays. It competes with Terasaki across industrial, marine, data centre, and utility end markets, but at vastly greater scale and breadth.
• Legrand: Legrand is a global specialist in electrical and digital building infrastructure, with a low-voltage protection and distribution portfolio that overlaps Terasaki's commercial-building switchgear offering, particularly in distribution boards and wiring accessories.
• Siemens: Siemens competes through its Sentron, 3VA, and 3WL low-voltage circuit breaker families across industrial, infrastructure, and marine applications. Its global scale and digitalization investments (e.g., SENTRON digital) are direct competitive threats to Terasaki's installed-base position.
• Eaton: Eaton is a major competitor in low-voltage power distribution and motor protection, offering IZMX, NZM, and Series NRX circuit breaker ranges. It directly overlaps with Terasaki in industrial, mining, and commercial-building applications, with a comparable emphasis on safety and reliability.
• Schneider Electric: Schneider Electric is a major competitor in low-voltage circuit protection via its Masterpact, Compact, and EasyPact ACB/MCCB ranges, and competes directly with Terasaki in data centres, commercial buildings, and industrial applications, while also offering broader energy management solutions.

Emerging players

• Katko: Katko is a Finnish manufacturer of switches, switch-disconnectors, and enclosed switchgear that is a documented Terasaki distribution and exhibition partner. It is a smaller, specialist peer with comparable focus on industrial and marine switchgear markets in Northern Europe.
• Chint Group: Chint is a leading Chinese manufacturer of low-voltage electrical products including NM8 and NB1 circuit breaker series. It competes with Terasaki in price-sensitive industrial and commercial applications, particularly in emerging markets and global EPC projects.

Direct peers

• Mitsubishi Electric: Mitsubishi Electric produces low-voltage air circuit breakers (AE-SW series) and moulded case circuit breakers, with strong penetration in Asian markets and global industrial projects. It is a direct product-line peer to Terasaki's TemPower 2 and TemBreak 2 ranges.
• LS Electric: LS Electric (formerly LS Industrial Systems) manufactures a broad range of low-voltage circuit breakers (Susol, Meta-MEC, and ABN-S series). It competes with Terasaki in industrial and commercial applications, often at lower price points, particularly in emerging markets.
• Hager: Hager is a European specialist in commercial and residential electrical distribution, including circuit breakers, distribution boards, and panel systems. It is a direct peer for Terasaki's RESILIENCE and GroupStak panel board products in commercial-building applications.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat6 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/TerasakiEurope

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries3 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 Terasaki