Transient Blocking Unit (TBU™) Electronic Current Limiter

Bourns offers four series of Transient Blocking Unit (TBU™) electronic current limiters: the P-G series, P40-G series, P-U series, and C-series

Image of Bourns Inc's Transient Blocking Unit (TBU™) Electronic Current LimiterBourns’ new TBU line includes four product families: The P-G series designed for voice protection, P40-G for VDSL protection, the P-U series for Ethernet protection, and the C series for general electronics protection. The P-G series meets very high surge requirements and prevents arcing and other damage in common applications.

Utilizing an innovative approach to electronics circuit protection, Bourns’ new TBU technology is designed to block a transient through a current disconnecting mechanism rather than diverting or shunting the surge to ground. This blocking technology virtually eliminates latency in the circuit protection design which results in surge protection for sensitive electronic equipment within nanoseconds. Bourns’ new TBU devices provide extremely effective wide bandwidth circuit protection against lightning, power induction, power cross and short circuit events in a wide variety of telecom applications including: voice circuits, Voice over IP (VoIP), Very High Speed DSL (VDSL), Ethernet, and T1/E1 applications. The TBU product is also used by customers in industrial, test and instrumentation, sensors, LVDS, and transportation applications.

Offering very high bandwidth for VDSL and VDSL2 applications, the P40-G TBU products meet rate-reach requirements. The P-U series is designed specifically for Ethernet applications by protecting against both lightning and power cross events. All Bourns TBU products are resettable for full functionality after multiple fault events and offer a high bandwidth of 3 gigahertz (GHz). Bourns’ TBU line exceeds system circuit protection requirements and is a cost-effective solution for reducing warranty returns. Specifically designed for overvoltage and overcurrent protection in telecommunication, industrial, and data communications systems, TBU technology was first announced by Fultec Semiconductor, from which Bourns acquired its TBU business in October 2008.

P-G, P40-G, P-U, and C Series TBU

ImageManufacturer Part NumberDescriptionPart StatusTechnologyAvailable Quantity
SURGE SUPP TBU 240MA 40VIMP SMDP40-G240-WHSURGE SUPP TBU 240MA 40VIMP SMDActiveInternal Switch4834 - ImmediateView Details
SURGE SUPP TBU 50MA 850VIMP SMDTBU-CA085-050-WHSURGE SUPP TBU 50MA 850VIMP SMDActiveInternal Switch12124 - ImmediateView Details
SURGE SUPP TBU 500MA 250VIMP SMDTBU-CA025-500-WHSURGE SUPP TBU 500MA 250VIMP SMDActiveInternal Switch9448 - ImmediateView Details
SURGE SUPP TBU 100MA 650VIMP SMDTBU-CA065-100-WHSURGE SUPP TBU 100MA 650VIMP SMDActiveInternal Switch8933 - ImmediateView Details
SURGE SUPP TBU 200MA 650VIMP SMDTBU-CA065-200-WHSURGE SUPP TBU 200MA 650VIMP SMDActiveInternal Switch9716 - ImmediateView Details
SURGE SUPP TBU 500MA 850VIMP SMDTBU-CA085-500-WHSURGE SUPP TBU 500MA 850VIMP SMDActiveInternal Switch10167 - ImmediateView Details
SURGE SUPP TBU 50MA 250VIMP SMDTBU-CA025-050-WHSURGE SUPP TBU 50MA 250VIMP SMDActiveInternal Switch6119 - ImmediateView Details
SURGE SUPP TBU 300MA 850VIMP SMDTBU-CA085-300-WHSURGE SUPP TBU 300MA 850VIMP SMDActiveInternal Switch11318 - ImmediateView Details
SURGE SUPP TBU 200MA 250VIMP SMDTBU-CA025-200-WHSURGE SUPP TBU 200MA 250VIMP SMDActiveInternal Switch3020 - ImmediateView Details
SURGE SUPP TBU 50MA 500VIMP SMDTBU-CA050-050-WHSURGE SUPP TBU 50MA 500VIMP SMDActiveInternal Switch5567 - ImmediateView Details
SURGE SUPP TBU 100MA 500VIMP SMDTBU-CA050-100-WHSURGE SUPP TBU 100MA 500VIMP SMDActiveInternal Switch5797 - ImmediateView Details
SURGE SUPP TBU 300MA 650VIMP SMDTBU-CA065-300-WHSURGE SUPP TBU 300MA 650VIMP SMDActiveInternal Switch1759 - ImmediateView Details
Published: 2013-10-08