Bourns Inc., a leading manufacturer and supplier of
electronic components, offers the company’s next-generation transient blocking
unit (TBU) series of circuit protection devices designed to protect a broad
selection of industrial and telecommunications applications. The new 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 Bourns TBU-CA Series, the devices are electronic current limiters (ECL)
that are triggered by excessive voltage or current. Designed as an optimal
circuit protection solution for medical electronics, the TBU-CA Series can be
used for protection on Ethernet, RS-485, HART, and other ports where dangerous
surge and power cross events may occur.
Protecting sensitive electronics and applications from the
potentially damaging effects of surges that can cause current and voltage to
rise above normal operating levels, the Bourns TBU-CA Series eliminates the
need for large shunt protection devices by stopping the damaging currents from
reaching protected circuits in less than one microsecond. The 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 significantly lower let-thru energy and overshoot protection,
which reduces stress on the printed circuit board for increased reliability and
product life.
The series is available in five impulse blocking voltages
from 250 to 850 V with minimum trip currents of 50 to 500 mA featuring
resistance values as low as 3 ohms. Product samples, evaluation boards, and
sample kits are available through Bourns’ distribution partners.