BEIJING, China –April 7, 2008 –ON Semiconductor (Nasdaq: ONNN), a global leader in efficient power management solutions, today announced that it has received the “Best Supplier 2007” award from Tianyu, China's top domestic mobile phone manufacturer, for the second successive year at a suppliers' day for over 500 industry professionals.

The award recognizes ON Semiconductor's outstanding levels of excellence in technology, quality, responsiveness, delivery and cost, all of which helped Tianyu to reduce cost, increase product quality and support its business growth. It also demonstrates the wide recognition and acceptance of ON Semiconductor's power management solutions by end-users in China.

The Best Supplier Award is given to selected 14 companies from among the hundreds of Tianyu suppliers, and ON Semiconductor is the only analog and discrete supplier to have won this recognition.

"We are honored to win this distinguished award for the second year running," said David Chow, ON Semiconductor vice president of Sales for Asia Pacific. "The award leverages our strong presence in mobile phone solutions and our commitment to delivering value propositions that are critical to our customers’ success. We have demonstrated that we can make a difference and this will pave the way for us to deepen our relationship with Tianyu to take our joint success to the next level."

Tianyu produced 17 million mobile phones in 2007and targets to manufacture 25 million units this year. To further enhance its service to Tianyu, ON Semiconductor has deployed dedicated field application engineers and will continue to provide first class products and technical support by implementing first priority partner program, enhancing strong relationship with Tianyu, fostering strategic reviews and product roadmap alignment, and conducting quarterly business reviews.

Tianyu uses ON Semiconductor’s power management products and solutions across a wide range of its mobile phones, which are marketed worldwide.

About ON Semiconductor
With its global logistics network and strong product portfolio, ON Semiconductor (Nasdaq: ONNN) is a preferred supplier of efficient power solutions to customers in the power supply, automotive, communication, computer, consumer, medical, industrial, mobile phone, and military/aerospace markets. The company’s broad portfolio includes power, analog, DSP, mixed-signal, advance logic, clock management and standard component devices. Global corporate headquarters are located in Phoenix, Arizona. The company operates a network of manufacturing facilities, sales offices and design centers in key markets throughout North America, Europe, and the Asia Pacific regions. For more information, visit https://www.onsemi.com.

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ON Semiconductor and the ON Semiconductor logo are registered trademarks of Semiconductor Components Industries, LLC. All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders. Although the company references its website in this news release, such information on the website is not to be incorporated herein.

About onsemi

onsemi (Nasdaq: ON) is driving disruptive innovations to help build a better future. With a focus on automotive and industrial end-markets, the company is accelerating change in megatrends such as vehicle electrification and safety, sustainable energy grids, industrial automation, and 5G and cloud infrastructure. With a highly differentiated and innovative product portfolio, onsemi creates intelligent power and sensing technologies that solve the world’s most complex challenges and leads the way in creating a safer, cleaner, and smarter world.

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onsemi and the onsemi logo are trademarks of Semiconductor Components Industries, LLC. All other brand and product names appearing in this document are registered trademarks or trademarks of their respective holders. Although the Company references its website in this news release, information on the website is not to be incorporated herein.

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