ECL design tolerates AC mains power contact without damage

Bourns Inc. has announced its latest series of transient blocking unit (TBU) circuit protection devices designed for high-speed protection of communications ports. These devices are electronic current limiters (ECLs) designed to tolerate AC mains power contact without circuit damage. Designated as the Bourns TBU DT-Series, the device family provides protection against faults caused by short circuits, AC power cross, induction and lightning surges. The company claims the series enables fast-reacting protection that does not alter the signal performance of high-speed communication ports, unlike high capacitance protectors.

The devices are targeted at Ethernet ports used in outdoor applications, such as security systems, PV panels and service kiosks. The devices provide an integrated solution that reduces design and manufacturing costs translating into faster time-to-market.

The Bourns TBU DT-Series features eight models, delivering continuous AC voltage ratings up to 425V_RMS and nominal trigger currents ranging from 150mA to 750mA. Devices come in surface mount DFN package and are lead free as well as RoHS compliant. Product samples are available now. The Bourns TBU-DT-065 and TBU-DT-085-XXX-WH are priced at 69 cents each in quantities of 15,000 units.