TBU-CA025-200-WH

Overview

The Bourns TBU-CA025-200-WH is a bidirectional Transient Blocker Unit (TBU) high-speed protector designed for board-level surge protection. It operates with a voltage rating of 250 V and an RMS current rating of 400 mA. The device utilizes Surface Mount Device (SMD/SMT) technology within a DFN package, supporting PCB mounting configurations. It functions as a solid-state silicon resettable overcurrent and overvoltage barrier. The component supports Cut Tape, Reel, and MouseReel packaging formats. It complies with UL standards and RoHS directives. The operational temperature range spans from -55°C to +125°C.

Feature Summary

• Provides bidirectional transient blocking and voltage isolation via solid-state silicon architecture
• Acts as a series barrier to suppress overcurrent and overvoltage events simultaneously
• Offers resettable protection functionality without requiring manual replacement after fault clearance

Applications

• Voice communication cards
• VDSL (Very-high-bit-rate Digital Subscriber Line) cards

Procurement Notes

Verify the specific ordering suffix against the manufacturer datasheet to ensure correct voltage and current ratings. Confirm that the required packaging format matches the project needs, as options include Cut Tape, Reel, or MouseReel. Check compliance documentation for UL and RoHS requirements relevant to the target market. Ensure the DFN package dimensions align with the PCB footprint design constraints before finalizing procurement.

Selection Notes

Select this component when bidirectional surge protection is required for sensitive telecommunications interfaces. The 250 V rating suits low-voltage signal lines, while the 400 mA capacity handles moderate load currents. Consider the DFN package size for space-constrained designs. Evaluate the -55°C to +125°C operating range against environmental conditions. This device serves as a resettable alternative to fuses in applications demanding rapid recovery from transient events.

Part Context

This part belongs to the Bourns TBU-CA series of High-Speed Protectors (HSP). The CA series features multiple pulse voltage and trigger current variants. These devices are engineered to protect circuits from lightning, power induction, cross-power, and ground potential rise events. They function as effective barriers by blocking transient current while providing voltage isolation.

FAQ

Is the TBU-CA025-200-WH unidirectional or bidirectional?

It is a bidirectional device, suitable for protecting lines where voltage polarity may reverse or is undefined.

What is the maximum operating temperature for this component?

The maximum operating temperature is +125°C.