Bourns Introduces Dual Channel TBU® High-Speed Protectors Designed for RS-485 Interface Applications

New TBU-RS Series Integrates a TBU® Overcurrent Device and TVS Overvoltage Protector Helping to Reduce Component Count and BOM Costs

RIVERSIDE, Calif., June 24, 2020 - Bourns, Inc., a leading manufacturer and supplier of electronic components, today introduced its high-speed Model TBU-RSxxx-300-WH series protectors for use in RS-485 communication interface applications and AISG (Antenna Interface Standards Group) modem protection. Offering a dual-channel solution, the two models (TBU-RS055-300-WH and TBU-RS085-300-WH) in the series are capable of protecting both twisted-pair RS-485 lines in a single product. Integrating a Transient Blocking Unit overcurrent protector with a TVS overvoltage protection diode in a single device, the Bourns® TBU-RS features fast (<1 μs) response time to protect against ESD, EFT, power cross and lightning transient surge threats.

Combining these devices into a one package solution helps reduce component count as well as BOM costs while simplifying assembly pick and place processes. Comparison tests by Bourns show that the TBU-RS series provides a 52 percent savings in board space when compared to typical discrete solutions. The TBU-RS series also aids in simplifying and accelerating the PCB design process by eliminating the PCB traces between the TBU devices and the TVS network.

A flexible solution, the TBU-RS series can be used with a customer's choice of primary protection for specific applications. When coupled with an overvoltage protector such as the Bourns® GDT (Model 2030-42T-SM-RPLF) or the Bourns® TISP® Thyristor Surge Protector (Model TISP4350J3BJR-S), the integrated solution supports compliance to IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT) and IEC 61000-4-5 (Surge) standards.

Bourns remains committed to developing continued technology advancements that address the protection needs in a wide range of applications. Available now, the Bourns® TBU-RS series is RoHS* compliant and meets industry standards such as Pb-free solder reflow profiles.

For additional product information, please see:

*RoHS Directive 2015/863, Mar 31, 2015 and Annex.

About Bourns

Bourns, Inc., is a leading manufacturer and supplier of position and speed sensors, circuit protection solutions, magnetic components, microelectronic modules, panel controls and resistive products. Headquartered in Riverside, California, USA, Bourns serves a broad range of markets, including automotive, industrial, consumer, communications, non-critical life support medical (low/medium risk), audio and various other market segments. Additional company and product information is available at

Bourns® and the Bourns logo are registered trademarks of Bourns, Inc. and may be used only with the permission of Bourns and proper acknowledgement. Other listed names and brands are trademarks or registered trademarks of their respective owners.

Bourns® products have not been designed for and are not intended for use in "lifesaving," "life-critical" or "life-sustaining" applications nor any other applications where failure or malfunction of the Bourns® product may result in personal injury or death. See Legal Disclaimer Notice

Agency Contact:
Annette Keller
Keller Communication
Company Contact:
David Scofield
Bourns, Inc.
(951) 781-5054