Microsemi Announces New Power MOS 8 Punch Through Series IGBTs

Microsemi Corporation (Nasdaq:MSCC), a leading manufacturer of high performance
analog mixed signal integrated circuits and high reliability semiconductors, has
announced a new family of high speed Power MOS8(r) insulated gate bipolar
transistors (IGBTs) featuring punch through technology in 600 and 900 Volt
devices.

The new Power MOS8(r) IGBTs target applications that include solar inverters,
high performance SMPS, and industrial equipment such as welders, battery
chargers, and induction heaters.

Key Features:

* Punch Through Technology
* Faster Switching
* High Efficiency - Low Saturation Voltage
* Short Tail - Minimizing Switching Losses
* Low VCE(ON)
The new Power MOS8(r) IGBT series exhibits low conduction losses VCE(ON), typ =
2.0V (600V) and 2.5V (900V), to increase overall circuit efficiency. Low
switching losses enable operation at frequencies over 100kHz--approaching the
performance of power MOSFETs but at lower cost.

Power MOS 8(r) IGBTs are available as single devices or packaged with DQ series
fast, soft recovery diodes. Samples are available now. In 1000 piece quantities,
prices range from $2.09 to $7.04 for discrete devices and $3.01 to $9.44 for
Combi's. Technical datasheets are available on the Microsemi website at
www.microsemi.com.

A sampling of the new MOS 8 IGBT line is shown below. Additional devices are
listed on the Microsemi website and in the current catalog.

---------------------------------------------------------------------
VCE(ON) I(C2)
Part Number Voltage (Typ 25C) (Typ 100C) Package
---------------------------------------------------------------------
SINGLE
---------------------------------------------------------------------
APT54GA60B 600V 2.0V 54A TO-247 or D3
---------------------------------------------------------------------
APT102GA60L 600V 2.0V 102A TO-264
---------------------------------------------------------------------
COMBI
---------------------------------------------------------------------
APT80GA60B2D40 600V 2.0V 80A T-MAX(r)
---------------------------------------------------------------------
APT80GA60LD40 600V 2.0V 80A TO-264
---------------------------------------------------------------------
SINGLE
---------------------------------------------------------------------
APT27GA90K 900V 2.5V 27A TO-220
---------------------------------------------------------------------
APT80GA90B 900V 2.5V 80A TO-247 or D3
---------------------------------------------------------------------
COMBI
---------------------------------------------------------------------
APT27GA90BD15 900V 2.5V 27A TO-247 or D3
---------------------------------------------------------------------
APT46GA90JD40 900V 2.5V 46A SOT-227
---------------------------------------------------------------------
APT64GA90B2D30 900V 2.5V 64A T-MAX(r)
---------------------------------------------------------------------
About Microsemi Corporation

Microsemi Corporation, with corporate headquarters in Irvine, California, is a
leading designer, manufacturer and marketer of high performance analog and mixed
signal integrated circuits and high reliability semiconductors. The company's
semiconductors manage and control or regulate power, protect against transient
voltage spikes and transmit, receive and amplify signals.

Microsemi's products include individual components as well as integrated circuit
solutions that enhance customer designs by improving performance, reliability
and battery optimization, reducing size or protecting circuits. The principal
markets the company serves include implantable medical, defense/aerospace and
satellite, notebook computers, monitors and LCD TVs, automotive and mobile
connectivity applications. More information may be obtained by contacting the
company directly or by visiting its web site at http://www.microsemi.com.

The Microsemi Corporation logo is available at
http://www.primenewswire.com/newsroom/prs/?pkgid=1233

PLEASE READ THE FOLLOWING FACTORS THAT CAN MATERIALLY AFFECT MICROSEMI'S FUTURE
RESULTS.

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1995: Any statements set forth in this news release that are not entirely
historical and factual in nature, including without limitation statements
concerning our expectations regarding new or existing products or technologies,
are forward-looking statements. These forward-looking statements are based on
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are not limited to, such factors as rapidly changing technology and product
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factors mentioned elsewhere in this news release, the reader should refer as
well to the factors, uncertainties or risks identified in the company's most
recent Form 10-K and all subsequent Form 10-Q reports filed by Microsemi with
the SEC. The forward-looking statements included in this release speak only as
of the date hereof, and Microsemi does not undertake any obligation to update
these forward-looking statements to reflect subsequent events or circumstances.

Investor Inquiries: Robert C. Adams, Microsemi Corporation, Irvine, CA (949)
221-7100.

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CONTACT: Microsemi Corporation
Financial Contact:
John W. Hohener, Vice President and CFO
(949) 221-7100
Editorial Contact:
Cliff Silver, Corporate Communications Manager
(949) 221-7100