First protection thyristor in DO-214AB package rated for 2kA surges

Littelfuse, Inc. has launched the Pxxx0S3H SIDACtor Protection Thyristor Series, the industry’s first 2kA surge protection component in a DO-214AB (SMC) package. This compact solution provides robust defence against severe transient events while enabling product miniaturisation – ideal for next-generation power and energy designs.

The 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 series 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: The first 2kA (8/20µs) surge-rated protection thyristor in a DO-214AB package, notably smaller than traditional TO-262 solutions.
• 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.
• Miniaturisation-Ready: Compact dimensions (6.22mm × 7.11mm × 2.62mm) support dense industrial, automotive, and solar energy systems designs.
• Flexible Deployment: It can be employed standalone or combined with an MOV for tailored protection architectures.

Target markets and applications include industrial and factory automation power supplies, automotive battery management and EV wall charging systems, solar DC/AC inverter protection, UPS and high-current AC distribution, harsh environment ICT infrastructure, and energy storage systems and IoT-connected power devices.

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