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New resettable overcurrent protection device from Raychem

Posted: 21 Jul 2005 ?? ?Print Version ?Bookmark and Share

Keywords:raychem circuit protection? tyco electronics? polyswitch? tsm600-400?

Device suits communications infrastructure appsRaychem Circuit Protection, a business unit of Tyco Electronics, unveiled a low resistance, resettable overcurrent protection device designed for communications infrastructure applications.

The RoHS-compliant PolySwitch TSM600-400 helps equipment comply with recent worldwide telecommunications standards such as Telcordia GR-1089 Issue 3, UL 60950 3rd edition and TIA-968-A (formerly FCC Part 68), and can also be used in systems designed to ITU-T K.21 & K.21 recommendations.

With its surface-mount configuration, small-footprint and low-resistance, the TSM600-400 is designed for use in high-density multi-port linecards and other space-constrained communications network equipment. This new product incorporates two matched, low-resistance PPTC (polymeric positive temperature coefficient) components in a single package, yielding highly balanced resistance characteristics.

"The TSM600-400 device's resettable functionality helps improve network reliability, reduce maintenance and repair costs, and enhance user-satisfaction," shared Boris Golubovic, global marketing manager for Raychem Circuit Protection. "Combining a TSM600-400 device with SiBar thyristor surge protector devices or Raychem Circuit Protection gas discharge tubes helps equipment designers comply with the lightning and AC power fault protection requirements defined in Telcordia GR-1089 Issue 3 that are scheduled to go into effect in 2006."

Each of the two resettable overcurrent protection components in the TSM600-400 device has a typical resistance of 1.2?, and the two components are typically matched to better than 0.3?. In addition to interrupting AC power faults, the device is designed to help equipment comply with Telcordia GR-1089 Issue 3 lightning tests, and has a rated hold current of 400mA at room temperature. This device is designed for operating temperatures between -40C and 85C, and withstands soldering temperatures of up to 260C for 60s maximum.

Priced at $1 in quantities of 100,000 units, the TSM600-400 is tape and reel packaged for compatibility with high-volume assembly processes. Delivery is 8 weeks ARO.

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