Seifert Electronic Gmbh

What Seifert Electronic Gmbh does

Seifert Electronic GmbH is a German manufacturer of customized heat sinks and thermal management solutions for electrical and electronic components, headquartered in Ennepetal and operating as part of the Heat Sink Group alongside its 2024-acquired subsidiary Webra Technology AB. Founded in 1965 by Rolf Seifert in Schwelm, the company produces standard and custom heat sinks from extruded aluminum profiles, including high-performance Vario and DKL series for forced cooling, one-piece Flexfin Skiving heat sinks with no thermal transition resistance, presspack cell cooling solutions for high-current/voltage applications, PC board elements, forced-cooling fan units, and thermal interface materials. Its manufacturing footprint at Ennepetal comprises 14 CNC machines (work surfaces up to 3,220mm x 800mm x 600mm, 3- and 4-axis), a computer-controlled 250-ton warehouse, anodizing up to 1,000mm, hard anodizing, chromating, painting, and assembly, complemented by a hybrid production model that sources selected Asian partners for skiving, liquid coolers, heat spreaders, and large-series volume.

The company sells directly through a technical-consulting sales motion — including a five-phase Heat Sink Consultant service, CAD data, samples, and on-site visits — to enterprise and SME customers across Wind Power, Railroad (EN 15085 certified), Laser, LED Lighting, Solar/Photovoltaic, Power Electronics/Converters, and PCBs, with commercial coverage in Europe, Asia, South Africa, and the USA. Pricing is quote-based and not publicly disclosed, with revenue generated from both catalog standard products and custom-engineered solutions, the latter often carrying exclusive usage rights. Quality is certified to ISO 9001:2015 (since 2001) and ISO 14001:2015 (since 2021) by TÜV-Rheinland. Ownership rests with the Grotensohn family, with Dipl.-Wirt.-Ing. Moritz Grotensohn serving as Managing Director; recent strategic activity has centered on the Webra acquisition, multi-product launches (ThermoFlex, ThermSpread, Flexfin Skiving, CupraMold, WieLeco), and the rollout of a Scandinavian sales office and Asian hybrid production capacity.

Name

Seifert Electronic Gmbh

Legal name

Seifert electronic GmbH

Website

https://seifert-electronic.de

Company type

Private

Founded year

1965

Operating status

Operating

Headcount range

11–50 employees

Short description

Seifert Electronic GmbH is a 60-year-old German manufacturer of customized extruded-aluminum heat sinks, Flexfin Skiving coolers, presspack cell cooling, and thermal interface materials, serving enterprise and SME customers in wind, rail, laser, LED, solar, and power electronics across Europe, Asia, South Africa, and the USA.

Ownership category

akta.pro rank

Product category

Thermal Management Components

NAICS

Other Electrical Equipment and Component Manufacturing (3359), Heating Equipment (except Warm Air Furnaces) Manufacturing (333414)

SIC

Electronic & Other Electrical Equipment (No Computer Equip) (3600)

akta.pro primary industry

Thermal Management Components (Heat sinks, TIMs, fans/blowers, thermal pads) (IMAGAJAL)

Keywords

• Heat sink manufacturing
• Thermal management solutions
• Power electronics cooling
• Extruded aluminum profiles
• Custom cooling components

Headquarters

HQ city

Ennepetal

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom Heat Sink Manufacturing: Design and manufacture of customized heat sinks for thermal management of electrical components. Products include standard profiles, high-performance heat sinks, finned heat sinks, liquid heat sinks, PC board elements, presspack cell cooling, and thermal interface materials. Revenue from both standard catalog products and custom-engineered solutions.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels4 records

Core offering

Seifert Electronic GmbH manufactures customized heat sinks and thermal management solutions for electrical components, built from extruded aluminum profiles and finished with CNC machining, skiving, and surface treatments. Core offerings include PC board elements, high-performance heat sinks (Vario and DKL series), Flexfin Skiving heat sinks, presspack cell cooling systems, and thermal interface materials. The company primarily serves industrial manufacturers in wind power, railroad, laser, LED, solar, and power electronics applications.

Product overview

Seifert Electronic GmbH is a specialized manufacturer of customized heat sinks and thermal management solutions for electronic components, operating for over 50 years. The company offers a comprehensive portfolio of cooling products including PC Board Elements (small-scale PCB cooling), Heat conducting and insulating products (thermal interface materials), standard and special profile Heat sinks, High-performance heat sinks (Vario and DKL series for forced cooling), Forced cooling systems (fan units), Presspack cell cooling (for high-voltage applications), and Flexfin Skiving heat sinks (one-piece construction). The product range is complemented by newer innovations like ThermoFlex hybrid heat sinks and ThermSpread heat spreaders. The company provides manufacturing capabilities including cutting, CNC machining, surface treatment, and assembly services, supported by a heat sink consultant service for product selection and optimization.

Differentiator

Problem solved

Functional benefit

Products and services

• PC Board Elements Thermo-conductive profiles and elements designed for component-level cooling on printed circuit boards, serving industrial electronics manufacturers.
• Heat Conducting Products Products engineered to conduct heat between electrical components and heat sinks, improving overall thermal transfer efficiency.
• Heat Sinks (Standard) Standard heat sink line for general electrical component cooling, available in multiple geometries for industrial use.
• High-Performance Heat Sinks (Vario and DKL series) High-performance heat sinks in the Vario and DKL series designed for demanding power electronics applications requiring high thermal dissipation.
• Forced Cooling Solutions Active forced cooling systems combining heat sinks with fans or blowers for high-heat-load electronics applications.
• Presspack Cell Cooling Custom heat sinks engineered for presspack semiconductor cells used in high-power converters and traction applications.
• Flexfin Skiving Heat Sinks Heat sinks manufactured using proprietary skiving technology to produce very thin, high-density fins for superior thermal performance in compact form factors.
• ThermoFlex Thermal Interface Material Flexible thermal interface material that improves heat transfer between components and heat sinks, complementing the heat sink product line.
• ThermSpread Thermal Interface Material Thermal interface material designed to spread heat evenly across surfaces, used alongside heat sinks for improved thermal performance.
• Heat Sink Consultant Service Engineering consultation service that helps customers design and select the right heat sink for their thermal management application, supporting custom and standard projects.
• CNC Machining Services Custom CNC machining services for aluminum profiles and heat sinks, enabling tailored geometries for customer-specific thermal management requirements.

Quantifiable outcome

• Heat sink widths up to 900mm for IGBT cooling applications
• +2 more outcomes

Named customers6 records

Segments7 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Partnerships

Two partnerships are on record, tiered minor and core.

• Asian Manufacturing PartnersminorStrategic or Co-development Partner · 1 January 2025Expanded production capacities through partnerships with Asian suppliers with different manufacturing specializations. Enables additional resources around skiving and liquid coolers, heat spreaders, and large series at favorable prices as part of hybrid orientation strategy.
• Webra Technology ABcoreStrategic or Co-development Partner · 1 September 2024Acquisition of Swedish technology leader Webra Technology AB from Enköping in September 2024 under the umbrella of the Heat Sink Group. Expands product portfolio in high-performance air and water coolers. Production of Webra heat sinks now at Ennepetal site. Rikard Buråker, former co-owner and site manager at Webra, joined as Head of Sales Europe.

Scale indicators7 records

Recent moves8 records

Expansion highlights5 records

Direct peers

• CTX Thermal Solutions: European custom heat-sink and liquid-cooling manufacturer serving power electronics, renewable energy and industrial drive applications with extruded, skived and cold-plate coolers — directly comparable to Seifert's engineered thermal-solutions portfolio.
• Fischer Elektronik: German manufacturer of heat sinks, cooling solutions and thermal interface materials with a comparable product portfolio covering extruded profiles, skiving/finned heat sinks, liquid coolers and PC board elements — the closest head-to-head competitor to Seifert in the DACH region.
• Cool Innovations: Custom heat-sink manufacturer focused on CNC-machined, extruded and skived aluminum coolers with engineering support for power-electronics applications — closely comparable to Seifert's project-based, engineered heat-sink business model.
• Advanced Thermal Solutions: Specialized heat-sink and thermal-management manufacturer offering extruded, bonded, skived and liquid cold-plate solutions, with strong direct overlap to Seifert's Vario/DKL, Flexfin and liquid-cooler product lines for power-electronics OEMs.
• Sunonwealth Electric Machine Industry: Manufacturer of cooling fans, blowers and thermal modules widely used in industrial electronics and power-electronics applications. Directly comparable to Seifert's forced-cooling fan-unit product line and overlaps in PC board and inverter cooling use cases.

Broad incumbents

• Rittal: German enclosure, climate-control and power-distribution manufacturer offering air-to-air heat exchangers, cooling units and liquid cooling packages for industrial electronics. Larger and broader than Seifert, but addresses overlapping thermal-management needs in industrial and power-electronics enclosures.
• Wakefield-Vette: Established North American thermal solutions provider with a broad heat-sink, cold plate and liquid-cooling portfolio serving power electronics, telecom and industrial OEMs. Overlaps with Seifert on extruded and high-performance heat sinks for power-electronics customers.
• CTS Corporation: Diversified industrial manufacturer with thermal-management products (heat sinks and assemblies) sold into power-electronics, transportation and defense markets. Larger and more diversified than Seifert, but competes in similar extruded/skived heat-sink categories.
• Aavid (Boyd Corporation): Global thermal management incumbent offering heat sinks, liquid cooling, heat exchangers and engineered materials across power electronics, EV, data center and industrial markets. Larger scale and broader portfolio than Seifert, but overlapping on extruded and skived heat sinks for power electronics.

Others

• Alpha Numerics (CelsiusEC): Thermal-simulation software provider whose CelsiusEC tool Seifert uses for design support; an ecosystem/adjacent partner rather than a competitor, but relevant for context on the thermal-management value chain serving the same power-electronics customers.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

Compliance3 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Subsidiaries1 record

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 Seifert Electronic Gmbh