Quality Check List



Dear Customer!

Behlke® quality products are worldwide protected by trademark and patent rights. Nevertheless from time to time we find dubious dealers in the internet, which offer primitive plagiarisms of our products, of course without the reliability and the performance of the original. They often look exactly like Behlke® products, but they are of lousy quality and are in no way comparable with the originals. Those plagiarisms are of poor performance at best, but often they are very dangerous too.


To ensure, that you get the original Behlke® product and that you receive always a true value for your money, we suggest you to check the following points:

  • Make sure, your dealer is an authorized reseller of Behlke® products. In order not to advertently buy fake products, never accept dubious deliveries without original labels, without original packing or without original documentation.  Customers should look out also for the price. Also an exceptionally low price can be an indicator for a fake.
  • Make sure, that the products come always in an originally sealed box with serial number sticker and final control stamp on the front side of the box. (to see an original packing please click here)
  • Behlke products are directly laser marked or wear alternatively a laser marked, forgery-proof plastic label, always in white on black (since 2009). Besides the technical data, the laser marking indicates always an 8-digit serial number (S/N…) and the manufacturing date and time (M/D…). Additionally, original products can be identified by at least two quality control stickers (Q…) with the surnames of at least two Behlke quality inspectors. The product is only original, if the S/N, M/D and Q data are plausible in context. In case of any doubt please consult Behlke under info@behlke.com.

Should you find a new and unknown “competitive” product on the market and if you are not sure about its quality, then please check these points:

  • Has the “competitor” the necessary production facilities to manufacture ambitious industrial products at all? Helpful is often a simple view on the competitors facility address by means of Google Maps, Google Street View or Microsoft Bing. Be careful, if there is just a family home, a garage or something similar. Recently we discovered a businessman in the internet, who has used our protected trademarks including a product name illegally to sell his "own" products. He even claims to be the inventor of those high voltage switches! When we searched his industrial production facility in Bing Maps, we found this. The plagiarism has been thoroughly examined by our engeneers and here is a brief laboratory report about the imitated product (please click here).    
  • Has the “competitor” the expertise for MIL or HIREL qualified microelectronics production processes including dry component storage, full component screening, component tracking, visual inspection etc.?
  • Does the “competitor” run a well documented and sufficient quality system? Is it executed by an independent and certified quality inspector? Is there a real serial production with quality improvement statistics?
  • Is the long-term reliability of the products proven by continuous tests? Does the “competitor” run extensive climatic and temperature cycling tests by using sufficient test equipment? Is there any documented burn-in procedure?
  • Are the solid-state products manufactured in a clean and ESD-save environment?
  • Does the “competitor” use professional electronic manufacturing technologies and machineries, such as part component desiccation, plasma treatment, automated SMD placement, machined vacuum potting etc.?
  • How long is the “competitor” on the market? Is there any significant competence in high-voltage related materials and high-voltage circuit design? Does he offer OEM products for medical, military and other safety relevant applications? Are there references?
  • Has the “competitor” the expertise to manufacture reliable solid-state switches in any configuration and in any semiconductor technology for voltages up to 150 kV and above? Is he able to design reliable solid-state switches with di/dt’s of 20 kA/us and above?
  • Has the “competitor” the expertise to built compact solid-state switches with 200 kV isolation voltage?
  • Has the “competitor” the expertise to manufacture high-voltage solid-state switches for continuous high power dissipation, e.g. in the Kilowatt range? Are all kinds of cooling methods available, such as cooling fins, cooling flanges, water cooling and direct liquid cooling? Has the competitor the expertise to make heat sinks with sophisticated materials such as copper compound, graphite and ceramics?
  • Is the “competitive” switching module equipped with an “intelligent” control circuit? Does it provide advanced EMC filtering functions, control signal conditioning, frequency monitoring, temperature protection, auxiliary voltage monitoring, over voltage protection, fault flag signal, inhibit function etc.?
  • Is the “competitive” switching module working over the whole temperature range without any restriction? Has the control signal any influence on the switching behavior? Is it possible to turn-off higher currents also at shorter on-times safely and without damaging the semiconductor stack? Or becomes the switch unstable at short control pulses?
  • Are all the technical data of the “competitive” product comparable to Behlke® products or is there just a similarity in a few specifications? Does the competitor specify the exact test conditions for the purpose of verification?
  • Does the “competitor” grants at least two years warranty for his products?

In case of any doubt, please do not hesitate and contact us under info@behlke.com
. Or simply buy the original directly from Behlke®, the inventor of fast high-voltage solid-state switches.  


Behlke Power Electronics
Frank Behlke, President

Note: Behlke® is a registered trademark of Behlke Power Electronics GmbH