Littelfuse introduces SMC Automotive Grade 3kA SIDACtor for AC power line protection

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Littelfuse has launched the Pxxx0S3N-A, an Automotive Grade 3kA SIDACtor Protection Thyristor Series in a DO-214AB (SMC) package.

This product has been designed to provide robust and reliable high surge current protection for equipment operating in harsh environments, enabling designers to meet regulatory requirements more easily. View the video.

The key differentiator of the series lies in its high-power density design, capable of withstanding surge currents up to 3 kA (8/20 µs) and voltages up to 6 kV with very low clamping voltage. This compact SIDACtor component, housed in the DO-214AB (SMC) package, allows automotive manufacturers to achieve high power density designs and product miniaturisation in automotive electronics.

Developed for Battery Electric Vehicles (BEV) and Plug-in Hybrid Electric Vehicles (PHEV) applications, the Pxxx0S3N-A Series, when used in conjunction with a MOV combination, delivers improved transient surge protection for on-board chargers. By integrating this compact SIDACtor into their systems, automotive manufacturers can achieve a more reliable, robust, and cost-efficient AC power protection of charging system.

The new 3 kA SIDACtor is the first thyristor-based product in the DO-214AB package to provide surge protection of 6 kV / 3 kA (8/20 µs). Previously, achieving such high surge ratings would require a significantly larger TO-262 package. This compact-sized SIDACtor offers easy protection against severe transients, making it an ideal choice for exposed applications such as:

  • Battery Electric Vehicles (EV/BEV),
  • Plug-in Hybrid Electric Vehicles (PHEV),
  • On Board Chargers (OBC),
  • Charging piles,
  • EV wall chargers, and
  • Energy Storage Systems.

This new SIDACtor Protection Thyristor Series offers the following key features and benefits:

High Surge Protection: Capable of handling severe overvoltage transients, it safeguards equipment from high-energy surge events up to 6 kV / 3 kA while providing very low clamping voltage.

Automotive Grade: Enables equipment to function flawlessly in harsh, demanding environments while ensuring compliance with the AEC-Q101 standard.

Compact Design: DO-214AB package ensures product miniaturization without compromising robustness, while assisting designers in compliance with stringent automotive grade requirements.

Versatility: While engineered mainly for the automotive industry, particularly for On-Board-Chargers in BEV and PHEV applications, this SIDACtor series has potential applications in the industrial and ICT electronics sectors.

Enhanced System Reliability: The combination of this compact SIDACtor and an MOV for transient surge protection promises a significantly more reliable and cost-efficient on-board charger system.

The Pxxx0S3N-A is more compact and offers a surge rating that’s suitable for highly exposed applications. It has a clear advantage over the Pxxx0FNL 3 kA SIDACtor series in the TO-262M package, requiring approximately 50% less PC board space.

According to Littelfuse, this product represents a leap forward, being the market's first DO-214AB sized product capable of handling a 6 kV / 3 kA (8/20) surge. Before this advancement, achieving such a level of protection would necessitate a much larger TO-262 package.