Günther Spelsberg GmbH + Co. KG

We are the EU market leader for waterproof surface-mounted junction boxes and small distribution boards

Spelsberg is one of the market-leading manufacturers in the electrical industry and has decades of expertise in electrical installation and enclosure technology. The family-owned company with 600 employees develops, produces and sells products and systems for the electrical trade and industry and is regarded as a competent problem solver for all enclosure-related tasks. Spelsberg’s portfolio includes over 8,000 standard and special products ranging from junction boxes, small distribution boards, terminal block, meter and industrial enclosures to more complex electrotechnical solutions and ready-to-install complete systems, which are developed individually for each customer and assembled ready for connection on request.

Whether for use in industrial halls, on farms, in exposed areas or in hard-to-access installation locations – Spelsberg offers customized indoor and outdoor enclosures for every application, which impress with their high-quality, reliable components, robustness, functionality and flexibility. The robust GEOS enclosure system, for example, has been specially designed by Spelsberg for harsh outdoor and industrial environments. Spelsberg is also a pioneer in the field of fire-protected installations and offers tested systems for electrical functional integrity in buildings and special applications such as tunnel systems. In addition, the manufacturer makes electricity usable as an energy source for environmentally friendly vehicles with products such as the new Spelsberg Wallbox. The high-quality charging system combines smart technology with a minimalist look, for which the Spelsberg Wallbox has already won several design awards. The new product also impresses with its compact dimensions and extremely easy handling – from installation and app configuration to everyday operation. Among other things, the Spelsberg Wallbox Smart Pro enables dynamic load management, integration into energy management or external third-party systems and access restriction via RFID chips, AutoCharge and Plug&Charge.

All special products developed, manufactured or assembled by Spelsberg are state of the art and comply with all national and international standards and regulations. In addition to DIN EN ISO 9001 certification, the in-house VDE and UL-certified test laboratory ensures a consistently high standard of quality. Spelsberg has been in family hands for four generations and still relies on production in Germany, at its two sites in Schalksmühle/NRW and Buttstädt/Thuringia.

With its regionally organized field service organization and special key account and industry managers, Spelsberg is in close contact with the specialist trade, wholesalers, planners and architects, as well as with energy suppliers and industry. Spelsberg products are available worldwide and are now sold through 10 subsidiaries in many European countries and partners in more than 60 countries.

European market leader products

Water-protected surface-mounted junction boxes and small distribution boards




World wide: 600

Germany: 550

South Westphalia: 450

Sales Volume

2023: 110 Mio. €



Founded by Ernst Spelsberg and Walther Kaiser


Development of the first plastic enclosures


Products for installation in damp rooms


Presentation of the first industrial enclosures


Solutions for photovoltaics


Foundation of the first international company in Great Britain


First products for fire-protected electrical installations


First small distributor with ventilation element


Development of the modular outdoor and industrial enclosure system GEOS


Foundation of the 10th subsidiary in France


Market launch of the Spelsberg Wallbox. Winner of three prestigious design awards


Extension of the socket distributors and enclosures with additional LAN connection and as backup boxes for inverters in the event of supply interruptions


Günther Spelsberg GmbH + Co. KG
Im Gewerbepark 1

Phone +49 2355 892-0

World Market Leaders from A-Z