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Discover now our wide-ranged job offers and have a carreer at Dr. Dietrich Müller. We are looking for:

  • Wholesale and Foreign Trader
  • Graduated in Electrical Engineer


PCIM Europe Nuremberg 2015

Thermally conductive pad: Thermipad TP 22715 with 15 W/mK

SPIE Smart Structures/NDE conference

Electronics & Components Hong Kong

Imports and exports of the electrical industry


InnoTrans Berlin

World Energy Engineering Congress Washington

Enova Paris

International Electric & Automation Show Bucharest

CFRP profiles

Energie Impulse Aachen

Water-jet cutting

 CWIEME in Berlin 2013

Coil Winding 2013

Thermiglue TL 23010

Coil Winding 2012

CWIEME Berlin 2012

Italian bobbin manufacturer

Working hours

NEC Birmingham UK

Advanced Engineering UK 2011

Clean Energy Expo Asia 2011

Contract 4S iPhone protectors


Electric Drives Production Conference

MOTEK 2011 and Bondexpo

IAA 2011

Norton TH

ArpaxX-Aramid Paper

Slot insulation material

Bern and public transport

Germany with great opportunities in the field of electric cars

Stamp parts from Valox for the lighting industry

Thermal management for LED – Applications

APTIV films are available as a new high performance materials

ArpaxX - push up the heat: Dr. Dietrich Müller GmbH

ZVEI: The Electrical Industry expects that the boom will continue in 2012

Lectures at the CWIEME Berlin 2011

CWIEME Berlin 2011: Dr. Dietrich Müller GmbH with a large product range

Increased Growth Forecast for the German Electrical Industry

Hannover Messe CoilTechnica:  A Good and Positive Response for Dr. Dietrich Müller

Delivery situation in Japan

FIEE: A resounding success for Dr. Dietrich Müller


Dr. Dietrich Müller: Punched parts made ​​of 3M VHB Tape

Dr. Dietrich Müller: Nomex® parts in self-adhesive version.

Dr. Müller GmbH CoilTechnica, Hannover.

MT in different varieties and Thermiflex

Dr. Müller GmbH: New product for the solar industry

Dr. Dietrich Müller registered as a UL – „Repackaged Recognized Components“ Company.

CWIEME Berlin 2010: Dr. Mueller in Ahlhorn

Dr. Mueller: High technology and innovation at one time in one venue

Dr. Müller GmbH continues its leadership as a supplier of Ultem films

Dr. Müller GmbH: New product line for films release

Dr. Müller proud of the opening of the Germany's first offshore wind park

Müller and Temac: Distribution agreement sealing materials

Get involved with the latest insulation product offerings at the Coil Winding 2010 – Dr. Müller GmbH


Direct request:

Enquiries from the United Kingdom:

Dr. Dietrich Mueller UK Limited

Tel    +44 7549 834830
Fax   +44 2476 996466


Enquiries from all other countries:

Tel: +49 4435 971010
Fax: +49 4435 971011

Let us know, which product you are
looking for and we will give you the
adress of the right distributor.



Electrical properties

GE-films offer excellent insulating properties. Manufacturer use the high dielectric strength, the good insulating- and light resistance as well as the constant dissipation factor of these materials for many electrotechnical and electric components.

Dielectric strength

GE films are especially resistant against breakdown at high-electric voltage. Therefore the effective dielectric strength depends on the film thickness, as shown in chart 11. All films meet comparable values at same thicknesses, and this by being nearly uninfluenced by moisture and thermal ageing. The standard for the maximum high-voltage resistance is calculated by multiplying the dielectric strength (kV/mm) by the film thickness (mm).

Picture 3: dielectric strength as a function of the film thickness



Chart 11: dielectric strength (kV/mm) according to ASTM D149



Dielectric constant

All Lexan® films have a dielectric constant of 60Hz and 0 up to 120°C in the area between 2.95 and 3.05. Even water absorption and saturation do not influence the value.

Picture 4:





Dissipation factor

The dissipation factor (or tangent of the loss angle between applied voltage and resulting current wave) is nearly equal for all Lexan® films. Between room temperature and 100°C it is about 0.001 (0.1%), increases then at 140°C up to 0.002 and above 150°C it increases significantly.
The consequences of the rate to the dissipation factor are illustrated in chart 6.

Picture 5:


Diagram 5: Dissipation factor of Lexan® in dependency of the temperature at 60Hz



Vorlume- and surface resistance

Lexan® films are especially resistant against power along their surface as well as against electrical continuity. This applies for direct- and alternating current. Water absorption till saturation and typical thermal ageing just have a negligible influence to these two properties.


Diagram 7: Consequences of the temperature to the volume resistivity of Lexan®


Arc resistance of Lexan films

The resistance of film surfaces against the influence of high-current arcs varies according to the film model: Qualities without fire protection, like Lexan® 8010, are generally more resistant than others with fire protection.

Picture 7:



Performance lever (PLC) according to UL746A

The PLC of the Underwriter Laboratories define power ranges for different electrical properties, “which are based on medium test values (and do not state exact numeral results) to avoid the impression of immoderate precision and tendencies.”
The PLC according to UL and/or ASTM are also registered on the “yellow card” of the UL: Chart 12 states the levels for GE films; chart 13 to 17 states the unique PLC.

Chart 12:

Chart 13:


Chart 14:


Chart 15:


Chart 16:


Chart 17: