What Sontheimer does

Sontheimer Elektro-Schaltgeräte GmbH is a German family-owned manufacturer of industrial electrical switches, founded in 1946 and headquartered in Schwabach, Germany. The company specializes in two core product lines: Nockenschalter (cam switches) in D0/8 and D0/13 series covering 10-1,600A, and Lasttrennschalter (load break switches) in LO, LT, and LX series covering 16-315A applications. Its technological foundation is the proprietary Schalter-Baukastensystem, a modular switch building block system enabling customer-specific configurations down to piece count 1, supported by in-house plastic injection molding, 100% electrical testing of every unit, and a portfolio of international certifications including IEC 60947, UL 508, CSA, CCC, and a unique worldwide UL489 certification for load break switches used as main disconnects.

The company serves industrial OEMs across at least eight vertical markets, including machine building, renewable energy (wind turbines), US panel builders, high-voltage infrastructure, communication networks, construction, marine/subsea applications, and emergency power systems. Named enterprise customers include MENNEKES, BARTEC, and SIEMENS. Sontheimer employs over 200 people at the Schwabach facility, which was expanded in 2009-2010 to quintupling capacity and consolidated in 2016-2017 with the in-sourcing of plastics injection molding.

The business model is sales-led with direct customer engagement and quote-based pricing for both standardized and custom-configured switches. Revenue is generated primarily through hardware sales of switches and switch assemblies, supplemented by professional services for custom development, CAD adaptation, branding, assembly, and wiring. Distribution occurs through the company's own e-commerce platform and direct sales contact, with global reach across industrial markets. The company maintains a family ownership structure under the Kapp family (acquired 1982, with sibling management since 2017) and has no external investors, funding rounds, or institutional shareholders disclosed.

Name

Sontheimer

Legal name

Sontheimer Elektro-Schaltgeräte GmbH

Website

https://sontheimer.org

Company type

Private

Founded year

1946

Operating status

Operating

Headcount range

51–100 employees

Short description

Sontheimer Elektro-Schaltgeräte GmbH is a German family-owned manufacturer (founded 1946) specializing in cam switches and load break switches built on a modular building block system, serving industrial OEMs across machine building, renewable energy, infrastructure, and extreme-environment applications worldwide.

Ownership category

akta.pro rank

Product category

Industrial Electrical Switchgear

NAICS

Switchgear and Switchboard Apparatus Manufacturing (335313)

SIC

Switchgear & Switchboard Apparatus (3613)

akta.pro primary industry

Switchgear & Switchboards (HV/MV/LV, GIS/AIS) (IMAGAAAB)

akta.pro secondary industries

Circuit Breakers, Disconnectors, Earthing Switches & Switchgear Components (EUADACAH), Low-Voltage Switchboards & Panelboards (LV distribution panels, MCCs, switchboards) (IMAGAEAA)

Keywords

• Industrial cam switches
• Load break switches
• Electrical switchgear
• Control switches
• Switch manufacturing

Headquarters

HQ city

Schwabach

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Switch Product Sales: Sale of standardized and custom-configured cam switches and load break switches. Products range from individual components to complete configured switch solutions. The company also offers development services, assembly, and wiring services as value-added components.
2. Custom/Individual Solutions: Development and manufacturing of custom switches for special applications. Services include CAD adaptation, individual branding, development services for special application areas, and assembly/wiring services for finished modules.
3. Configuration and Assembly Services: Supply of pre-configured switches with accessories, mounting, and wiring services for complete assemblies

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels5 records

Core offering

Sontheimer Elektro-Schaltgeräte GmbH develops and manufactures industrial cam switches (Nockenschalter) and load break switches (Lasttrennschalter) at its Schwabach, Germany facility, with current ratings from 10 to 1,600 A. The company sells standardized series (D0/8, D0/13, LO, LT, LX) as well as fully customized switch solutions built on a modular building block system, including assembly, wiring, and branding services for industrial OEMs and machine builders.

Product overview

Sontheimer Elektro-Schaltgeräte GmbH offers a specialized portfolio of industrial electrical switches, comprising two core product lines: Nockenschalter (cam switches) available in D0/8 and D0/13 series for currents 10-1,600A, and Lasttrennschalter (load break switches) offered in LO, LT, and LX series for 16-315A applications. The LO series provides compact solutions for 16-63A, the LT series covers heavy-duty applications up to 315A, and the LX series targets US market requirements with exclusive UL 489 certification. All products can be individually configured using their modular switch kit system, with customization services including housing adaptation, accessories (131 parts in 19 sizes), branding, and complete development services. Production is fully integrated in Germany at their Schwabach facility, with in-house plastic injection molding ensuring consistent quality.

Differentiator

Problem solved

Functional benefit

Products and services

• Nockenschalter D0/8 (Cam Switch Series D0/8) Classic cam switch series with touch-safe terminals suitable for control and motor switching as well as electronic circuits. Current ratings from 10 to 1,600 A, available in 1 to 6-pole configurations with various switching positions. Targeted at industrial machine builders and panel builders requiring reliable main, control, motor, and changeover switches.
• Nockenschalter D0/13 (Cam Switch Series D0/13) Slim-profile enclosed cam switch series with only 9mm build height per chamber, enabling numerous switching combinations. Features touch-safe terminals for vertical mounting and captive cross-head screws. Designed for industrial control and distribution cabinet applications where compact dimensions are required.
• Lasttrennschalter LO-Serie (Load Break Switch LO Series) Compact load break switches for currents 16-63A, designed for use as main and emergency stop switches in machine tools and control/distribution cabinets. Features forced-acting contacts and generous clearances. Targeted at machine builders needing compact, IEC 60947-compliant main and emergency stop switching.
• Lasttrennschalter LT-Serie (Load Break Switch LT Series) Four frame sizes for nominal current range 16-315A, designed for rough and heavy environments with extensive accessory options. Optimal for demanding applications requiring flexible, durable, and expandable switches. Targeted at industrial OEMs operating in harsh environments.
• Lasttrennschalter LX-Baureihe (Load Break Switch LX Series) World's only load break switches certified to UL 489 standard, specifically designed for industrial machinery and equipment for the US market. Can be used as main disconnect or in feeder/branch circuit applications. Targeted at US panel builders and machine manufacturers requiring UL-compliant main disconnects connectable directly to the main power line.
• RLS Safety Switch (Gehäuseschalter) Compact enclosure safety switch (Gehäuseschalter) launched as a versatile 'allrounder' for industrial safety switching applications. Targeted at machine builders and panel builders needing safety switch solutions.
• Individuelle Schalter-Lösungen (Custom Switch Solutions) Custom switch development and configuration services based on the modular Schalter-Baukastensystem, including program adaptation, housing customization, accessories (131 parts in 19 sizes), individual branding, interface adaptations, assembly services, and development services for special applications such as extreme temperatures, high altitudes, deep-sea use, and dust-laden environments. Targeted at OEMs with specialized switching requirements that standard catalog products cannot address.

Quantifiable outcome

• >15,000 different active switch types produced annually
• +2 more outcomes

Named customers3 records

Segments8 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

One partnership is on record.

• ascon-Datenschutz GmbH & Co. KGminorOthersExternal data protection officer (Datenschutzbeauftragter) for Sontheimer. Contact: Stefan Auer, Lina-Ammon-Straße 19, 90471 Nürnberg.

Scale indicators5 records

Recent moves7 records

Expansion highlights5 records

Direct peers

• Kraus & Naimer: Kraus & Naimer is a long-established specialist manufacturer of cam switches and rotary control switches for industrial applications, with overlapping product range, certifications (IEC, UL), and direct OEM customer base that competes head-to-head with Sontheimer's Nockenschalter portfolio.
• Benedict GmbH: Benedict (Austria) specializes in cam switches and switchgear for industrial applications, including main and emergency-off switches, offering similar product configurations and serving machine-builder customers in overlapping European geographies.
• Lovato Electric: Lovato Electric is an Italian specialist manufacturer of cam switches, load break switches, and rotary control switches serving industrial OEMs globally, with comparable modular design philosophy and a direct overlap with Sontheimer's Nockenschalter and Lasttrennschalter lines.

Broad incumbents

• Eaton: Eaton (including the legacy Moeller/Klingspor portfolio) produces cam switches, load break switches, and rotary control switches with strong European industrial OEM penetration, competing with Sontheimer in machine-builder and panel-builder applications.
• Schneider Electric: Schneider Electric offers TeSys and ComPact switchgear lines for industrial control and power distribution, overlapping with Sontheimer's load break switch applications across machine building, panel building, and energy infrastructure segments.
• ABB: ABB is one of the world's largest manufacturers of low- and medium-voltage switchgear, switchboards, and load break switches, serving the same industrial, infrastructure, and renewable-energy customers as Sontheimer but as part of a vastly broader electrification portfolio.
• Siemens: Siemens manufactures SIRIUS, 3KD, and 3KF load break switches and cam switches as part of its industrial controls portfolio; it is also a Sontheimer reference customer, illustrating the dual competitor/customer dynamic in this market.
• Legrand: Legrand offers industrial cam switches and disconnect switches within its broader electrical and digital building infrastructure portfolio, with overlapping product types for OEM machine-building customers in Europe and globally.

Regional players

• C&S Electric: C&S Electric is an Indian manufacturer of low-voltage switchgear, including load break switches and changeover switches for industrial and renewable-energy applications, comparable to Sontheimer's products but serving primarily South Asian and Middle Eastern markets.

Emerging players

• Schmersal Group: Schmersal is a leading manufacturer of safety switchgear, including position switches, safety switches, and emergency-stop devices, overlapping with Sontheimer's safety-switch positioning and BARTEC-type customers in explosion-proof and machinery-safety applications.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

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 Sontheimer