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Electronic Current Limiter Triggered by Excessive Voltage or Current

Wed, 06/30/2010 - 6:43am
Electronic Current Limiter Triggered by Excessive Voltage or CurrentBourns Inc., a leading manufacturer and supplier of electronic components, today announced its latest series of Transient Blocking Unit (TBU) circuit protection devices designed to protect devices from surges in the industry’s first electronic current limiter triggered by excessive voltage or current. Designated the Bourns TBU PL-Series SLIC, the circuit protection device family provides extremely fast overcurrent protection combined with SLIC battery voltage tracking triggered protection. Combined with additional overvoltage protectors, this solution protects against very high surge levels and meets telecom 500A Telcordia GR-1089 intrabuilding and 6kV/150A ITU-T standards.

Protecting sensitive applications from the potentially damaging effects of surges that can cause current and voltage to rise above normal operating levels, the TBU PL-Series responds in 100 nanoseconds. The resettable circuit protection devices also feature significantly lower let-thru energy and overshoot protection, which reduces stress on the SLIC and the printed circuit board (PCB) for increased reliability and product life. The TBU series also cuts the circuit protection component count to three devices compared to the seven needed in a conventional gated thyristor solution because there is no need for peripheral R-C or L-C components nor additional GDTs for increased surge requirements that take up valuable PCB space and increase manufacturing costs.

The Bourns TBU PL-Series is available in three voltages (850, 600, and 500) and two operating current levels (100 and 200 mA) that match worldwide standards and SLIC chipset requirements. Product samples, evaluation boards, and sample kits are available now through Bourns’ distribution partners.

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