New NPxxx TSPDs are ideal for surge protection of telecommunication circuits found in modems, residential gateways, and central office access equipment

PHOENIX, Ariz. – Nov. 14, 2007 - ON Semiconductor (NASDAQ: ONNN), a global leader in efficient power semiconductors solutions, has expanded its lineup of circuit protection solutions with the introduction of the new NPxxx series of Thyristor Surge Protection Device (TSPD) for telecommunications applications.

The NPxxx series of 44 devices protect telecommunication circuits found in central office, access and customer-premises equipment from over voltage conditions. Ideal applications include modems, residential gateways, Digital Subscriber Line Access Multiplexer (DSLAM), and Integrated Voice Data (IVD) cards.

Offered in both an industry-preferred DO-214AA surface mount package (SMB) and a robust DO-15 axial leaded package, the devices are reliable and economical. Used as part of the secondary protection circuit, these devices provide overvoltage protection by diverting energy away from the circuit being protected. The NPxxx devices are UL497A certified, and implementation into electronics applications assists in meeting various regulatory requirements including GR-1089-CORE, ITU K.20/K.21/K.45, IEC 61000-4-5, IEC 60950, YD/T 993, YD/T 950, YD/T 1082.

“ON Semiconductor is committed to providing our customers with solutions to the increasingly complex circuit protection problems faced by our customers,” said Gary Straker, ON Semiconductor director of Protection and Control products within in the Standard Products Group. “Additional circuit protection solutions will be introduced that target the various challenges facing today’s Telecom systems designers.

The Devices
The 44 new NPxxx devices are high surge current TSPDs offered in a range of protection voltages from 64 volts (V) to 350 V. They are available at surge current ratings of 50 amps, 80 amps and 100 amps. The devices limit voltage and divert surge current to ground. They are bidirectional, so they are able to have functionality of two devices in a single package. This saves valuable space on board layout. Basically, these devices act as a “crowbar” when an overvoltage occurs – diverting potentially damaging energy away from the sensitive circuit or device. Once the transient overvoltage has passed, these devices return to their normal “off” or transparent state, and appear invisible to the normal operation of the circuit. With no wearout characteristics, these TSPDs feature stable performance characteristics under fast transient conditions - assuring reliable and continued equipment operation.

The NPxxxx devices are offered in 5.40 mm x 3.5 mm DO-214AA surface mount package and the 7.60 mm x 3.60 mm DO-15 Axial Lead package and priced at $0.10 per unit in 10,000 unit quantities.

For more information about these and other ON Semiconductor Circuit Protection devices visit

About ON Semiconductor
With its global logistics network and strong portfolio of power semiconductor devices, ON Semiconductor (Nasdaq: ONNN) is a preferred supplier of power solutions to engineers, purchasing professionals, distributors and contract manufacturers in the power supply, computer, consumer, portable/wireless, automotive and industrial markets. For more information, please visit ON Semiconductor’s website at

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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 Web site in this news release, such information on the Web site is not to be incorporated herein.

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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.


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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