Aimed at telecom over-current protection applications, the Circuit Protection Division of Bourns has expanded its line of robust and stable ceramic positive temperature coefficient (PTC) thermistors.The CMF-SDP series provides improved resistance tolerance to ensure continuous circuit protection in customer premise equipment, central office, access equipment and other telecommunication centre applications.
The devices are available in six form factors including a compact dual-package that combines two resistance matched ceramic PTCs together in a single housing to help telecommunications equipment manufacturers reduce the number of circuit protection devices required per board.
“With this announcement, Bourns is broadening its selection of circuit protection devices to offer one of the most comprehensive lines of ceramic PTC circuit protection products in the industry,” said Brian Ahearne, technical marketing manager for the Multifuse product line in Bourns’ Circuit Protection Division. “What further sets Bourns apart is our strong technical applications expertise along with our commitment to helping our customers find the best technologies and products to protect their design.”
PTCs have become the device of choice to protect against the high-voltage and high-current environment in telecom applications. Under fault conditions the device resistance will rise exponentially and remain in a ‘tripped’ state, providing continuous circuit protection until the fault is removed. Once the fault is removed and the POWER cycled, the device will return to its normal low resistance state.
The CMF-SDP family aids compliance with the latest ITU, Telcordia and UL telecommunication standards. The products are RoHS compliant, and available in thru-hole, surface-mount, thru-hole dual and thru-hole quad packaging. The products are offered as a standard 50ohm product but other resistive values are available on request. The products can withstand induction voltage of 600VAC with a rated voltage of 230V, says the company.
Info :electropages.com
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