Air Cooled Heat Sink

COUGAR ELECTRONICS can design and produce high performance air cooled heat sinks for advanced applications.

General principle

Air cooled heat sinks allows an exchange between a surface, heated by an electronic component, and the air.

There are two kind of heat sinks :

Several manufacturing technologies exist :

  • Extrusion
  • Bounded fins
  • Brazed fins
  • Machining into raw material

Following the thermal parameters of the application, COUGAR ELECTRONICS will help you to find the optimal cost / efficiency solution.


Technical datas

  • Material: Aluminum 6060/6061/6082
  • Thermal resistance: 15 to 35°C/kW
  • Surface treatment: anodizing / suretec / nickel plating…


  • Simplicity
  • Cost


  • Natural convection heat sink
  • Brazed radiator
  • HSHP radiator

Insulated Heat Sink

COUGAR ELECTRONICS is distributing on US market CECLA METAL PROCESS’ unique know-how in the manufacturing of high tension electrical insulated cooling solution.


In some high tension configurations of multi-scale power converters, it’s necessary to use oversized electronic semiconductors in order to respect dielectric norms of the application, particularly in railway application.

Electrical insulated cooler allow to avoid the oversizing of the components in multi-scales’ topologies by adding insulation between the component its cooling system.


  • Economic on high tension multi-scale converters
  • Appropriate shape and dimensions for your component topology
  • Appropriate for on-board using, especially in the railway industry

Technical caracteristics

  • Insulation : up to20kV
  • Thermal resistance : 15 to 55°C/kW
  • Fire-Smoke qualification : ULV0

Heat Sink with embedded Heat Pipes

COUGAR ELECTRONICS is distributing on US market CECLA METAL PROCESS’ range of HSHP heat sink. This performing solution allow to reduce weight and improve compactness by spreading the heat with heat pipe in the base plate of the heat sink.


The typical application of heat sink with embedded heat pipes is high density power semiconductors. Those heat sinks, can also be used to increase the maximum power of a heat sink, without changing the size. The heat pipe by their high thermal conductivity will act as heat spreader and allow all heat sink working better,


  • Light and compactness
  • Performing solution, without change of size
  • Able do dissipate high density thermal flux semidonductors

heat sink air cooled

The technology

Selenium rectifiers and suppressors are still used in the industry for their strong reliablity. This technology has been mainly replaced by silicon diodes, providing a better efficiency and lower voltage drop. Selenium components are very interesting for their reliability. Those components have the ability to recover after surge failure, which make them excellent for security applications. COUGAR ELECTRONICS has been one of the leading company in the 50's. We are the last firm still manufacturing parts made in USA thanks to our CT factory.

Elevator industry, Military and power generation

Despite most of our business is now focused on up to date semionductors like silicon diode, thysirtors, IGBT and SiC, our manufacturing department is serving elevator industry (otis, schindler, kone, thyssen krupp). We also serve specific fields like military or power generation application .

Service and Fast delivery

Our excellence in organisation, allow us to serve after-sales service with exceptional fast deliveries :
  • same day shipping
  • next day shipping

Looking for a part, call us !

If you look for a specific part number, or even if you do not have part number. Do not hesitate to call us. We build and design any type of selenium rectifier or selenium suppressor. Do not give up, thinking these components are impossible to find. We are here to help ! [caption id="attachment_2376" align="alignnone" width="282"]selenium rectifier selenium rectifier[/caption] [caption id="attachment_2370" align="alignnone" width="297"]Selenium7 Rectifier 3 phases[/caption] [caption id="attachment_2369" align="alignnone" width="210"]Selenium Suppressor Surge Suppressor[/caption]

Troubleshooting a selenium rectifier or suppressor

Our customer service will be happy to help you to determine what's the best solution.

Find parameters for rectifiers :

  • Voltages: Standard Voltages per cell up to 36 v rms. The voltage rating is determined by the number of cells in series
  • Current: Ratings are determined by the size of the cell or the number of cells in parallel. The circuit configuration and the type of cooling are also important factor to consider.
  • Circuits: Half wave, Doublers, Center Taps, Full Wave Bridges, single and three phase.

Find parameters for suppressors :

  • Ratings: Determined by the cell size and number of cells in a series (similar to rectifiers above).
  • Suppressors are also rated by the voltage clamping factor and the amount of reverse energy they can absorb (in joules).

More information about our product