Transient Blocking Units Feature a Broad Range of Trigger Currents, Voltages
Wed, 09/29/2010 - 7:28am
Bourns, Inc. introduced its next-generation Transient Blocking Unit (TBU) Series of circuit protection devices designed to protect a broad selection of industrial and telecommunications applications. The series provides ultra-fast overcurrent protection offered in a wide range of trigger currents and voltages and reduced form factors to save valuable board space. Designated the TBU-CA Series, the new devices are electronic current limiters (ECL) that are triggered by excessive voltage or current. The TBUs are appropriate for protection on Ethernet, RS-485, HART and other ports where dangerous surge and power cross events may occur.These circuit protection devices are low capacitance, single bidirectional high speed devices designed to protect against faults caused by short circuits, AC power cross, induction and lightning surges within rated limits. The resettable devices also feature low let-thru energy and overshoot protection, which reduces stress on the printed circuit board (PCB) for increased reliability and product life. The TBU-CA Series is available in five impulse blocking voltages from 250 V to 850 V with minimum trip currents of 50 mA to 500 mA featuring resistance values as low as 3 ohms.