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High-density surge protection for EV chargers

By Michelle Froese | April 17, 2025

Littelfuse, Inc. has introduced the Pxxx0S3G-A SIDACtor Protection Thyristor Series, the first in the industry to deliver 2 kA (8/20 µs) surge protection in a compact DO-214AB (SMC) package.

Designed to protect sensitive electronics in harsh operating conditions, the series is suited for applications in electric vehicle (EV) systems and renewable energy infrastructure.

The compact form factor allows for space-efficient integration into power-dense environments such as onboard chargers (OBCs), battery electric vehicle (BEV) and plug-in hybrid vehicle (PHEV) charging systems, and EV wall chargers, while meeting AEC-Q101 automotive-grade compliance standards.

This makes it particularly relevant for engineers developing compact, high-reliability protection solutions in next-generation electric mobility platforms.

Compared to legacy protection devices in larger TO-262 packages, the Pxxx0S3G-A series reduces PCB footprint by up to 50% without compromising surge capability. The device also offers non-degrading performance over time, providing long-term protection and reducing maintenance requirements for systems exposed to frequent or high-energy over-voltage events.

Features

  • High surge protection in a compact form factor: The Pxxx0S3G-A Series offers 2 kA (8/20 µs) surge protection in a DO-214AB (SMC) package, the smallest available form factor capable of such high-power density.
  • Enhanced design flexibility: Compared to traditional solutions requiring a larger TO-262 package, the DO-214AB’s compact size allows for easier integration into space-constrained designs, including IoT devices, high-power density industrial equipment, and medical power supplies.
  • Reliability and longevity: Unlike legacy solutions that degrade over time, the Pxxx0S3G-A series sustains transients without degradation, ensuring long-term equipment protection and reducing maintenance costs.
  • Automotive-frade compliance: The series fully complies with AEC-Q101 standards, making it ideal for automotive applications such as On Board Charger (OBC) protection, BEV/PHEV protection, and automotive battery charging systems.

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Filed Under: Charging, Technology News
Tagged With: littelfuse
 

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