ref --Previous Message--
Thales SA Suisse, former BBC/ABB infocom AG, may help you to find the data sheet. You may ask the department R&D. They have kept a lot of old BBC data books.
Switzerland- Thales Broadcast & Multimedia AG
Phone number: +41.(56) 299.22.10
Fax number: +41.(56) 288.11.25
: --Previous Message--
: Hi Bert
: I found some components in an old store and i have probems locating the
: datasheets (googling didnt help). The parts are some heavy, long (20-30
: cm) ceramic diodes with metalic ends, used for high power transmitters. I
: copy here what is written on the body of the diode:
: Brown Boveri BBC Si-E 9000/4000 - 3.0
: UGE 2206 AU
: GN 7000007
: I know that BB is a company that made kW transmitters, but they dont have
: any component data on the site.
: Are they useful for some HV experiments?
: I was suggested to phone to company, but it is not so simple from where i
: Hi Vasil,
: This is a common problem. For example, I have three large 19" x
: 1.25" x 2.25" rectifier sticks that I can't get any specs for,
: and I don't have a DC supply that goes high enough to test them. Your best
: bet is to contact ABB (the current parent company) to see if they can
: provide you with any information:
: Since these devices were originally part of a transmitter, they may also
: have internal/proprietary part numbers, making them even more difficult to
: track down.
: You may be able to measure the "knee" of the reverse breakdown
: voltage (Peak Inverse Voltage) by connecting a high voltage resistor (one
: that's capable of holding off the applied voltage) in series with a
: current meter and the rectifier. The series resistor must be able to limit
: the current to 1 MA or below at maximum voltage. Connect the rectifier so
: that it's blocking current (reverse direction), and slowly increase the
: voltage while monitoring the current via a 0-500 uA microammeter. Once the
: rectifier begins to break down, you should begin to see a significant
: increase in current. The safe PIV will then be 75-80% of this value for
: that particular diode chain.
: However, because these rectifiers are so long, they may easily be rated
: for 25 kV - it may be difficult to provide sufficient voltage to perform
: this test. Also, this test will not tell you the safe current rating for
: the device - for this you really need to get information from ABB. Would
: it be possible to get schematics of the transmitter that they came from?
: From the size of them, they sound like they could handle just about
: anything you could throw at them, and they are likely capable of
: multi-ampere current levels. Nice find!
: I don't know if it's related, but IXYS does make a 24kV 5A rectifier that
: seems to have a similar part number (Si-E 9000/4000-0.7) - see:
: Good luck and best regards,
: -- Bert --