Littelfuse Debuts Industry’s First Protection Thyristor in DO-214AB Package Rated for 2 kA Surges

Space-saving solution provides robust overvoltage defense for EV charging, UPS, and solar inverter systems

ROSEMONT, Ill., August 12, 2025 — Littelfuse, Inc. (NASDAQ: LFUS), a diversified, industrial technology manufacturing company empowering a sustainable, connected, and safer world, today announced the launch of the Pxxx0S3H SIDACtor® Protection Thyristor Series, the industry’s first 2 kA surge protection component in a DO-214AB (SMC) package. This compact solution offers robust defense against severe transient events while enabling product miniaturization—ideal for next-generation power and energy designs.

The Pxxx0S3H Series is purpose-built for AC and DC power lines in demanding environments. It provides exceptional surge immunity for applications such as industrial power supplies, automotive battery charging systems, solar inverters, UPS/AC distribution systems, and ICT equipment. With its high current handling and compact footprint, the Pxxx0S3H enables engineers to meet IEC 61000-4-5 Level 4 requirements while reducing overall device size.

“Design engineers are under increasing pressure to fit more functionality into smaller enclosures without sacrificing safety,” said Ben Huang, Director of Product Marketing Management, Protection Semiconductor Business at Littelfuse. “The Pxxx0S3H Series addresses that need with a best-in-class combination of compact packaging, surge durability, and regulatory compliance—outperforming traditional MOV- or GDT-based solutions that degrade over time.

Key Differentiators and Benefits

• High Surge Capability in Compact Footprint: First 2kA (8/20 µs) surge-rated protection thyristor in DO-214AB package, significantly smaller than traditional TO-262 solution
• Long-Term Reliability: The semiconductor-based design withstands repeated high-energy surge events without degrading, unlike legacy GDT or MOV-based devices.
• Regulatory Compliance: Aids system compliance with IEC-61000-4-5 Level 4 standards for surge immunity.
• Miniaturization-Ready: Compact dimensions (6.22mm × 7.11mm × 2.62mm) support dense industrial, automotive, and solar energy systems
• Flexible Deployment: It can be used standalone or combined with an MOV for tailored protection

Target Markets and Applications

• Industrial and factory automation power supplies
• Automotive battery management and EV wall charging systems
• Solar DC/AC inverter protection
• Uninterruptible power supply (UPS) and high-current AC distribution
• Harsh environment ICT infrastructure
• Energy storage systems and IoT-connected power devices

The Pxxx0S3H Series allows engineers to design smaller, more reliable, and longer-lasting systems without compromise by replacing bulky and degradation-prone protection components.

Avaliability

The Pxxx0S3H Series SIDACtor Protection Thyristors are available in tape-and-reel quantities of 3,000. Place sample requests through authorized Littelfuse distributors worldwide. For a listing of Littelfuse distributors, please visit Littelfuse.com.

For More Information
Additional information on the latest series release is available on the Pxxx0S3H Series SIDACtor Protection Thyristor product page. For technical questions, please contact Ben Huang, Director of Product Marketing Management / Protection Semiconductor Business, bhuang@littelfuse.com