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High Speed Protector SMT Package
Manufacturer Part #: TBU-DT085-200-WH
Alternate Part #: TBU-DT085-200-WH
The TBU-DT Series of Bourns TBU (Transient Blocking Unit) products are very low capacitance dual unidirectional high-speed surge protection components designed to protect against faults caused by short circuits, AC power cross, induction and lightning surges.The TBU-DT series is a unidirectional TBU device; the TBU protector will trip in less than 1 μs when the current reaches the maximum value in one direction only, that is when Pin 1 is positive in voltage with respect to Pin 2, and Pin 4 is positive with respect to Pin 3. No current limiting exists in the opposite polarity, and the TBU device appears as resistive in nature. The reverse current should not exceed the maximum trigger current level of the TBU device. An external diode may be used to prevent reverse current in DC biased applications.The TBU protector blocks surges and provides an effective barrier behind which sensitive electronics will not be exposed to large voltages or currents during surge events. After the surge, the TBU device resets when the voltage across the TBU device falls to the Vreset level. The TBU device will automatically reset on lines which have no DC bias or have DC bias below Vreset (such as unpowered signal lines).The TBU device is provided in a surface mount DFN package and meets industry standard requirements such as RoHS and Pb Free solder reflow profiles.