TYCO ELECTRONICS HAS UNVEILED RAYCHEM Circuit Protection’s new PolySwitch SMD050-2018 resettable device for telecom and networking applications. The SMD050-2018 device helps provide resettable overcurrent protection for voice-over-Internet Protocol (VoIP) and powered Ethernet equipment and is designed to meet the voltage and hold-current requirements of the IEEE802.3af Ethernet specification.

The SMD050-2018 resettable device is designed to help facilitate the development of reliable, carrier-grade VoIP systems. When installed between the power source and output of a powered Ethernet device, the SMD050-2018 device provides a second layer of defense in the power management circuit. Should any power control FET fail short, the PolySwitch device shuts down the individual port and helps prevent a system-wide power failure. Once the fault condition and power are removed, the device resets and allows the affected equipment to return to normal operating conditions. The SMD050-2018 device also helps overcome the fatigue failures, unrecoverable nuisance tripping and installation problems associated with the traditional single-use fuses.

“This device was developed in response to new circuit protection requirements as described in the IEEE802.3af powered Ethernet specification and plays a key role in the design of carrier-grade, reliable VoIP systems,” said Adrian Mikolajczak, multimedia market manager for Raychem Circuit Protection. “With an FIT of less than 0.01 when used at rated voltages, the PolySwitch SMD050-2018 device offers a new class of reliability and survivability in the field.”

The PolySwitch SMD050-2018 surface mount device is available in tape-and-reel packaging for compatibility with high-volume manufacturing. It is priced at 26 cents each in quantities of 100,000.