Bourns Introduces Model PTVS03-450E-H High-Voltage TVS Diode

Four-terminal Kelvin design supports current measurement up to 100 A with resistance values as low as 0.5 mΩ

RIVERSIDE, Calif., November 10, 2026 - The Bourns® Model PTVS03-450E-H is a high-voltage, unidirectional TVS diode designed for DC bus clamping applications. The device provides a 450 V repetitive standoff voltage and a peak current rating of 300 A per IEC 61000-4-5 8/20 µs surge requirements, enabling protection against transient overvoltage events in high-voltage DC power systems.

The model is optimized for use in emerging 800 VDC distribution architectures, including AI deployment and rack protection applications, where reliable surge protection and system uptime are critical. The compact surface mount DFN package supports space-constrained designs while providing robust surge handling performance. The device is RoHS compliant* and operates across a junction temperature range of -55 °C to +150 °C.

Features 

• 300 A (8/20 µs) surge capability
• Unidirectional TVS
• Surface mount package

Applications

• DC bus protection 
• 800 VDC distribution architecture into AI deployment and rack protection. 
• Solid-state circuit breaker

Summarized Specifications

Availability

The Model PTVS03-450E-H PTVS diode is available now through Bourns authorized distribution partners. Product details, inventory information and sample requests are available at bourns.com/products/diodes/power-tvs-diodes. Engineers may also contact Bourns Customer Service or Inside Sales for application support and ordering information.

About Bourns

Bourns is the global electronic components partner for design engineers whose systems must keep working—in vehicles, aircraft, defense and navigation systems, medical devices†, data centers, satellites, consumer electronics, energy systems, and the networks that connect them. Across power, protection, sensing, timing, and thermal management, Bourns builds solutions for the demanding requirements those systems create. The family that founded Bourns in 1947 still governs the company—a stewardship that lets Bourns commit to its people, technologies, and customers for decades rather than quarters. For more information, visit bourns.com.

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.

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

†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 bourns.com/docs/legal/disclaimer.pdf