Designed for EV chargers, solar inverters, UPS, and industrial systems, it offers high reliability, long-term durability, and compliance with stringent global surge immunity standards—enabling smarter, smaller, and safer power designs.
Littelfuse has introduced the Pxxx0S3H Series SIDACtor Protection Thyristors, marking a significant industry milestone as the first 2 kA (8/20 µs) surge-rated protection device available in the compact DO-214AB (SMC) package. This component is designed to deliver robust overvoltage protection in AC and DC power lines while supporting the ongoing trend toward product miniaturization. With its compact footprint (6.22 mm × 7.11 mm × 2.62 mm) and high surge capability, the Pxxx0S3H Series is ideal for demanding applications such as electric vehicle (EV) wall charging systems, solar inverters, uninterruptible power supplies (UPS), industrial power supplies, and ICT infrastructure deployed in harsh environments.
The key features are:
- Maintains performance with no degradation after repeated surges
- Features low voltage overshoot during surge events
- Typical failure mode is a short circuit when overstressed
- Withstands IEC 61000-4-2 ESD up to 30 kV (air/contact)
- Flame-retardant compound rated UL94V-0
- RoHS compliant and halogen-free
- Pb-free E3 finish: tin (Sn) terminal per IPC/JEDEC J-STD-609A.01
Unlike traditional solutions that rely on metal oxide varistors (MOVs) or gas discharge tubes (GDTs), the Series features a semiconductor-based design that offers long-term reliability and stability, even after repeated high-energy transient events. This eliminates the degradation over time commonly associated with older protection technologies. The thyristors also support system-level compliance with IEC 61000-4-5 Level 4 standards for surge immunity, giving engineers a performance-ready solution for modern high-power designs.
The compact size and high surge capability of the Series make it particularly suitable for space-constrained designs across automotive, industrial, and renewable energy markets. Its flexible deployment—either as a standalone device or in combination with an MOV—enables tailored protection architectures for various system requirements. The company emphasizes that this series addresses a critical need in today’s electronics landscape, where engineers are pressured to deliver more functionality in smaller, more efficient packages without compromising safety or durability.Available now in tape-and-reel packaging of 3,000 units, the Series is distributed globally through authorized partners.