KUNZ

What KUNZ does

Gebr. Kunz GmbH (KUNZ) is a third-generation, family-owned German industrial manufacturer founded in 1922 and headquartered in Maxdorf, Rhineland-Palatinate. Since the late 1960s the company has specialized in high-current electrical installation components—copper and aluminum expansion connectors (GKKP, GKKN, GKKS, GKAS, GKKH series, compliant with DIN 46 276), custom busbars rated from 5,000 to 300,000 amperes (air- or water-cooled, AC or DC), earthing bands (6-75 mm² cross-section), and engineered-to-order special components. Manufacturing relies on specialized joining processes including pressure welding, inert-gas welding, and riveting of copper and aluminum foils, underpinned by ISO 9001:2015, DIN EN 15085-2 (railway welding), and DIN EN ISO 3834-3:2021 certifications.

The firm's revenue model combines custom hardware sales (the dominant stream) with professional engineering services—planning, calculation, CAD construction, small-batch rectifier/DC-reactor production, and on-site revision and mounting for medium- and low-voltage power plants. Go-to-market is enterprise field sales: products are quote-based, pricing is not public, and there is no e-commerce channel. The company reaches industrial buyers through direct relationships and trade-fair presence at Hannover Messe, WindEnergy Hamburg, and the Hydrogen Technology World Expo (HTE), the latter co-exhibited with Italian partner Elexo Srl since October 2025.

KUNZ serves six primary verticals—electrical industry (transformers, generators, e-motors, rectifiers, switchgear), primary/chemical industry (electrolysis and smelting for chlorine, zinc, nickel, steel, aluminum, graphite, cement, glass), traffic engineering (rail, e-mobility), mechanical engineering (welding machines, special machinery), renewables (wind, solar, hydro), and power-plant engineering (installation, revision, mounting). Recent strategic emphasis is on green hydrogen and renewable-energy applications, evidenced by the HTE debut and ongoing trade-fair activity.

Name

KUNZ

Legal name

GEBR. KUNZ GMBH

Website

https://www.kunz-highcurrent.com

Company type

Private

Founded year

1922

Operating status

Operating

Headcount range

11–50 employees

Short description

KUNZ develops, produces, and manufactures copper connectors, aluminum connectors, copper busbars, earthing tapes, and aluminum busbars.

Ownership category

akta.pro rank

Product category

High-Current Electrical Components

NAICS

Electronic Connector Manufacturing (334417), Current-Carrying Wiring Device Manufacturing (335931)

SIC

Electronic Connectors (3678), Electronic Components & Accessories (3670)

akta.pro primary industry

Connectors & Interconnect Components (Industrial connectors, terminals, sockets, backplane) (IMAGAJAC)

akta.pro secondary industry

Connectors (Power/Signal/High-Speed) (HDAHAOAA)

Keywords

• High-current connectors
• Copper busbars
• Earthing bands
• Expansion connectors
• Power installation components

Headquarters

HQ city

Maxdorf

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. High-Current Component Manufacturing & Sales: Design, engineering, and manufacturing of high-current components including expansion connectors, busbars, earthing bands, and special components. Products are sold directly to industrial customers across electrical, chemical, and power generation sectors. Revenue generated through product sales with custom specifications and volume-based pricing.
2. Engineering Services: Comprehensive engineering services including planning, calculation, and construction of high-current installations. Also includes revision services for medium and low voltage power plants and site mounting/installation services.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

KUNZ develops, produces, and manufactures high-current electrical installation components including expansion connectors (copper and aluminum series GKKP, GKKN, GKKS, GKAS, GKKH), copper and aluminum busbars rated 5,000-300,000 amperes, earthing bands, and custom special components. The company also provides engineering services for high-current installations and revision/mounting services for medium and low voltage power plants.

Product overview

Gebr. Kunz GmbH (KUNZ) is a third-generation family business since 1922 specializing in high-current installation components. The company offers a comprehensive portfolio of expansion connectors (GKKP, GKKN, GKKS, GKAS, GKKH series compliant with DIN 46 276), busbars rated for 5,000-300,000 amperes, earthing bands, and special custom components. These core hardware products are complemented by engineering services for high current installations (planning, calculation, CAD construction, and small-batch production) and revision/mounting services for power plant equipment in the medium and low voltage range.

Differentiator

Problem solved

Functional benefit

Products and services

• GKKP - Pressure-Welded Copper Expansion Connectors Expansion connectors made entirely of copper foils, welded under pressure and heat to produce a compact and massive copper block. Compliant with DIN 46 276 Series GKKP. Designed for industrial high-current power installations.
• GKKN - Pressure-Riveted Copper Expansion Connectors Expansion connectors made entirely of high-strength copper foils with riveted copper sheet contact ends. Compliant with DIN 46 276 Series GKKN. Suited for extremely high motion frequencies.
• GKKS - Inert-Gas-Welded Copper Expansion Connectors Expansion connectors built up by copper foils with flat copper contact ends that are inert-gas welded. Compliant with DIN 46 276 Series GKKS. Good conductivity with optional terminal end forms.
• GKAS - Inert-Gas-Welded Aluminum Expansion Connectors Expansion connectors built up by aluminum foils (0.3-0.5mm thick) with flat aluminum contact ends that are inert-gas welded. Compliant with DIN 46 276 Series GKAS. Designed for aluminum connections.
• GKKH - High-Flexible Copper Braids High-flexible copper or aluminum braids with pressed copper tube contact ends. Wire diameter 0.1-0.5mm. Current ratings from 100A to 850A. Compliant with DIN 46 276 Series GKKH.
• High-Current Busbars Custom busbars for electrolysis and smelting applications with rated currents between 5,000 and 300,000 amperes. Manufactured in copper or aluminum, available air-cooled or water-cooled, AC or DC configurations.
• Earthing Bands Earthing bands with single wire Cu-ETP conductors, bare or tinned copper braid options, and cross-sections from 6mm² to 75mm². Current carrying capacity per IEC 439.
• Special Components Custom special components used as connecting elements inside and outside of high-current installations, manufactured to customer specifications.
• Engineering of High Current Installations Complete high current technology engineering services including planning, calculation, CAD construction, and small batch production of rectifiers and DC reactors.
• Revision & Mounting Services Revision services for medium and low voltage power plant equipment, and site mounting services including welding, supervision, and complete plant component installation.

Quantifiable outcome

• Rated currents up to 300,000 amperes for busbar systems
• +1 more outcomes

Segments6 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

One partnership is on record.

• Elexo SrlcoreStrategic or Co-development Partner · 1 October 2025Italian strategic partner for joint trade fair participation and collaboration in green energy technology. KUNZ and Elexo co-exhibit at Hannover Messe (Booth C87 Hall 13 in 2025) and HTE Hydrogen Technology World Expo in Hamburg (October 2025). The partnership focuses on combining expertise for green hydrogen applications and joint market development in the hydrogen industry.

Scale indicators3 records

Recent moves6 records

Expansion highlights5 records

Market position

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/gebr-kunz-gmbh

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 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 KUNZ