Seifert Electronic Hochleistungskühlkörper
50+ Years Engineering Excellence

Precision Heat Sinks forMaximum Power Densities

FlexFin Skiving & ThermoFlex: When standard geometries reach their limits. High-precision manufacturing from a single piece for extreme thermal requirements. Made in Germany.

50+
Years Experience
15
FPI
11
FPI (ThermoFlex)
24/7
Engineering Support
Manufacturing Process

Precision in Action

Experience the manufacturing of our high-performance heat sinks. Made in Germany.

600 mm
Variants
230W
Thermal Conductivity
600 mm
Variants
Product Portfolio

Two Technologies for Highest Requirements

FlexFin Skiving for maximum power density. ThermoFlex for flexible high-performance heat sinks through innovative press technology.

FlexFin Skiving

FlexFin Skiving

Precision Heat Sinks for Maximum Power Densities

High-precision skiving manufacturing from a solid aluminum block. Extremely high fin density, minimal thermal transition resistances and maximum design freedom.

Fin Density
Max. Height
Thermal Resistance
15FPI
<0.08 K/W
Made in Germany
ThermoFlex

ThermoFlex

Flexible High-Performance Heat Sinks through Innovative Press Technology

New press technology with optimized base material that significantly exceeds classic extrusion profiles. Combines high design freedom, economical manufacturing and excellent thermal properties.

Tolerance
Flatness
Variants
11FPI
500+
±0.05mm Precision

50+ Years Engineering Guarantee

Free Consultation
CFD Simulation
Custom Design

Precision Heat Sinks for Maximum Power Densities

SKIVING PROCESS
FlexFin Skiving Process - Heat sinks being peeled from one piece

In the skiving process, we apply a special manufacturing technique where finned heat sinks are 'peeled' from a single piece. The individual heat sink fins are directly connected to the base without any transition. The base and fins of FlexFin Skiving heat sinks form a thermal unit.

THERMISCHE EINHEIT

Basis und Lamellen bilden eine perfekte thermische Verbindung ohne Übergangswiderstand.

AUS EINEM STÜCK

Höchste mechanische Stabilität und Zuverlässigkeit durch monolithische Fertigung.

MATERIALS
Materialien - Aluminium Legierungen

The fins are machined from an aluminum block of the 1.000 series or the 6.000 series. Aluminum's thermal conductivity is optimal at up to 230 W/mK. If higher heat dissipation performance is required, copper (Cu1100) can also be used as the base material.

230 W/mK
Wärmeleitfähigkeit Aluminium
Cu1100
Kupfer Option
COMPACT & FLEXIBLE

The compact design from a single piece makes the heat sinks less susceptible, as no additional material is used to connect the base plate to the individual fins. With the same surface area, the heat sink is lighter and saves material costs.

No Thermal Interface Resistance
"No worries about fins coming loose"

There is no thermal interface resistance, as exists in heat sinks with pressed, soldered or glued fins. Thoughts about loosening fins or aging joining material are thus unnecessary. FlexFin Skiving heat sinks from Seifert electronic GmbH are excellently suited for thermoelectric applications or power modules with high power loss.

0%
Interface resistance
100%
Thermal efficiency
Lifespan
MAXIMUM FLEXIBILITY
FlexFin Skiving - wie aus dem Ei geschält
"peeled like from an egg"

We manufacture FlexFin Skiving heat sinks exactly according to customer-specific requirements and are maximally flexible. We don't negotiate on one thing: Every single FlexFin Skiving heat sink is perfectly finished.

TAILORED

Manufactured exactly to your customer-specific requirements.

PERFECTION

Every single heat sink is finished flawlessly.

Technical Specifications & Benefits

Technical Parameters

Precisely specified for maximum performance

B
Heat Sink Width
< 1.000 mm
L
Heat Sink Length
< 500 mm
T
Base Thickness
< 30 mm
Lt
Fin Thickness
0,15 mm – 1,5 mm
La
Fin Spacing
0,3 mm – 6,5 mm
Lh
Fin Height
3 mm - 140 mm

Why FlexFin Skiving?

manufacturing from one piece

geometry and design freedom in heat sink dimensions

No tooling costs – enables small series

Fast prototypes without tooling investment

Engineering Support
Experience the quality in person

Experience the quality in person – let us solve your thermal challenge.

Heat Sink Inquiry
Made in Germany
Seit über 50 Jahren
Christoph Schumacher
Your Contact Person
Christoph Schumacher
Sales Director D-A-CH
christoph.schumacher@seifert-electronic.de
📞 +49 (0) 2333-79 060
Target Industries

Thermal Solutions for Every Industry

From railways to renewables. From defense to e-mobility. Precision cooling where it matters most.

Railway Heat Sink

Railway Technology

Reliable thermal solutions for traction converters, braking systems, and onboard electronics.

Traction Inverters
Brake Resistors
HVAC Systems
EN 50155 certified
Wind Energy Heat Sink

Wind Energy

High-reliability cooling for wind turbine converters and generators in harsh environments.

Converter Systems
Generator Cooling
Control Electronics
IP67 protection
Aerospace Heat Sink

Defense & Aerospace

MIL-spec thermal management for mission-critical military and aerospace applications.

Radar Systems
Avionics
Power Amplifiers
MIL-STD-810
LED Technology Heat Sink

LED Technology

Precision thermal management extending LED lifetime and maintaining light quality.

High-Power LEDs
Street Lighting
Industrial Lighting
Junction temp <85°C
Laser Systems Heat Sink

Laser Systems

Ultra-precise cooling for industrial laser systems requiring tight temperature control.

Laser Diodes
CO₂ Lasers
Fiber Lasers
±0.1°C stability
Power Electronics Heat Sink

Power Electronics

Advanced cooling for high-density power conversion and motor drive systems.

IGBTs
MOSFETs
Power Modules
Rth <0.1 K/W
Medical Technology Heat Sink

Medical Technology

Medical-grade thermal solutions for diagnostic and therapeutic equipment.

MRI Systems
X-Ray
Laser Surgery
IEC 60601 certified
E-Mobility Heat Sink

E-Mobility

Next-generation cooling for electric vehicle powertrains and charging infrastructure.

Battery Packs
Motor Controllers
DC Chargers
800V architecture

Mercosur

Certified thermal solutions for the Mercosur market. Compliance with regional regulations and international quality standards.

Mercosur Certification
Compliance with regional regulations
Local support in South America
Optimized logistics for the South American market

Your industry not listed? We engineer custom thermal solutions for any application.

Discuss Your Requirements
High Performance Heat Sink
Technology & Innovation

Engineering Perfection

FlexFin Skiving & ThermoFlex: High-precision manufacturing technologies for maximum thermal performance. Engineered for extreme power densities.

Thermo Simulation

Thermo Simulation

CFD analysis and thermal modeling for optimized FlexFin Skiving & ThermoFlex design. Calculation of optimal fin geometry and heat distribution before production.

FEM Analysis
CFD Simulation
Thermal Mapping
Stress Testing
Material Science

Material Science

Aluminum alloys optimized for FlexFin Skiving & ThermoFlex. Maximum thermal conductivity (λ > 200 W/mK) and mechanical strength for monolithic and pressed structures.

AlMgSi1
EN AW-6063
λ > 200 W/mK
Anodizing

Testing & Validation

In-house thermal testing laboratory for validation of FlexFin Skiving & ThermoFlex performance. Ensuring specifications for Rth, fin density and mechanical stability.

Thermal Chamber
IR Thermography
Wind Tunnel
Quality Control

Made in Germany

50+ years manufacturing excellence for FlexFin Skiving & ThermoFlex. Certified quality management systems for precision skiving and innovative press technology.

ISO 9001
DIN EN 1090
In-house R&D
European Supply Chain

Engineering Process

From concept to delivery: Your FlexFin or ThermoFlex solution in 5 steps.

01

Requirements Analysis

Detailed specification of thermal, mechanical, and environmental requirements. Decision between FlexFin Skiving (maximum power density) or ThermoFlex (flexible press technology).

02

Thermal Simulation

CFD analysis and thermal modeling to optimize FlexFin Skiving or ThermoFlex geometry. Calculation of optimal fin density, spacing and height.

03

Design & Engineering

CAD design for FlexFin Skiving (monolithic structure) or ThermoFlex (press technology). Material selection and manufacturing constraints for both technologies.

04

Prototyping & Testing

Rapid prototyping without tooling costs for FlexFin Skiving & ThermoFlex. Thermal validation in our test lab with measurement of Rth and performance.

05

Production & Delivery

Series production of FlexFin Skiving (skiving manufacturing) or ThermoFlex (press technology) with continuous quality control. Economical even for small series.

Contact

Let's Discuss Your Project

We look forward to your inquiry and are happy to advise you on your thermal challenge.

* Required fields. Your data will be treated confidentially.

Phone

+49 (0) 2333-79 060

Mon-Fri: 7:00 AM – 4:30 PM

Your Contacts

Christoph Schumacher

Christoph Schumacher

Sales Director D-A-CH

Rikard Buråker

Rikard Buråker

European Sales Director

CERTIFIED

ISO 9001
Quality Management
DIN EN 1090
CE Marking
RoHS
Environmental Protection
REACH
Chemical Regulation
ISO 9001
Quality Management
DIN EN 1090
CE Marking
RoHS
Environmental Protection
REACH
Chemical Regulation