IXYS Releases 4000V/40A IGBT to Expand its Very High Voltage (VHV) IGBT Family.

SANTA CLARA, Calif. -- IXYS Corporation (NASDAQ:SYXI) announces the release of a new 4000V/40A IGBT, the IXEL40N400. IXYS' unique offering of discrete 2500V and 4000V VHV IGBTs provide a myriad of benefits to system designers in high voltage applications. The very high voltage and current ratings of these parts coupled with simplified MOS Gate-Control greatly reduce the complexity of high voltage switching. These parts are offered in IXYS' ISOPLUS(TM) packaging to enable simpler mounting with improved reliability.

IXYS' VHV IGBTs vastly simplify the circuitry needed for switching in high voltage designs. They can enable the use of a single device in systems whose circuits use multiple cascaded lower voltage switches. This device consolidation reduces the numbers of power devices, while also improving cost and efficiency by eliminating complex drive and voltage balancing components. In those applications using high voltage thyristors, designers sacrifice the ability to easily turn-off the switch without greatly increasing circuit complexity. VHV IGBTs have the ability to turn switch current on and off, enabling the designer to implement signal modulation schemes for improved efficiency and wave shaping, as well as enabling load disconnect for improved systems safety.

IXYS' proprietary ISOPLUS discrete packaging improves the simplicity, reliability and efficiency of high voltage systems. The previously offered IXLF19N250A comes in IXYS' ISOPLUS i4-Pac(TM), while the IXEL40N400 is offered in IXYS' newly designated ISOPLUS i5-PAC(TM). All of IXYS' ISOPLUS packages are manufactured with an internal DCB isolated substrate are UL registered and provide integral backside case isolation. These packages provide for improved creepage distance to simplify compliance with regulatory spacing requirements. Their ceramic substrate enhances device reliability by greatly improving thermal and power cycling. An isolated backside simplifies mounting and with superior isolated thermal impedance. Thermal performance can be further improved by combining IXYS' ISOPLUS package use with clip mounting and next generation phase change interface materials. More information on the IXYS' ISOPLUS(TM) technology can be found on the IXYS' website or the IXYS 2004/5 Selector Guide.

A broad range of high voltage applications stand to benefit from the simplicity offered by these convenient, discrete VHV IGBTs. Automated Test Equipment generating or measuring high voltage, pulse circuits and capacitor discharge applications, high voltage power supplies, laser and x-ray generation systems can all be designed more simply, with reduced cost and complexity. Traditional high voltage Electromagnetic Relays (EMRs) and discharge relays also can be replaced, reducing system complexity and improving overall reliability. Further information regarding IXYS' family of VHV IGBTs can be found at www.ixys.com.

Any statements contained in this press release that are not statements of historical fact, including the performance, ruggedness, and suitability of products for various applications, may be deemed to be forward-looking statements. There are a number of important factors that could cause the results of IXYS to differ materially from those indicated by these forward-looking statements, including, among others, risks detailed from time to time in the Company's SEC reports, including its Form 10-Q for the quarter ended September 30, 2005. The Company undertakes no obligation to publicly release the results of any revisions to these forward-looking statements.