ECLs tolerate AC mains power

25 May 2011 Circuit & System Protection

Bourns rolled out its latest series of TBU (transient blocking unit) circuit protection devices designed for high-speed protection of communications ports.

The new devices are electronic current limiters (ECLs) designed to tolerate AC mains power contact without circuit damage. Designated TBU DT series, the products provide protection against faults caused by short circuits, AC power cross, induction and lightning surges.

The ECLs are very fast-reacting protectors that do not alter the signal performance of high-speed communication ports, unlike high-capacitance protectors. They are suitable for Ethernet ports used in outdoor applications such as security systems, PV panels and service kiosks. The new series features eight models and offers continuous AC voltage ratings up to 425 Vrms and nominal trigger currents ranging from 150 mA to 750 mA. The device family comes in a surface mount DFN package and is lead free and RoHS compliant.

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