Compact SMD fuse delivers reliable overcurrent protection for BMS

Littelfuse, Inc., an industrial technology manufacturing company, announced the release of its new 823A Series Fuse, an AEC-Q200-qualified, high-voltage-rated surface-mount (SMD) fuse with high interrupting ratings.

Designed to meet the stringent requirements of modern electric vehicle (EV) power systems and other automotive applications, the 823A Series offers a compact 5 x 20 mm footprint while delivering excellent overcurrent protection for 1000 Vdc systems.

This makes it ideal for battery management systems (BMS), battery disconnect units (BDU), and high-voltage dc-dc converters in EVs and fuel cell electric vehicles (FCEVs).

The Littelfuse 823A Series is notable for its innovative wire-in-air design, resulting in superior temperature stability, high interrupting ratings (100 A @ 1 kV dc), and a high I²t value in a small form factor.

Features

• AEC-Q200 qualification. Ensures reliability and performance in demanding automotive environments.
• A 1000-Vdc rating. Suitable for high-voltage applications, such as BMS and BMU in EVs and FCEVs.
• A compact 5 x 20 mm SMD footprint. Saves printed circuit board (PCB) space, which is ideal for compact designs.
• Wide operating temperature range. Performs consistently in extreme temperatures from -40º to 125º C.

Benefits for design engineers

• Enhanced system protection. Prevents nuisance opening caused by high inrush and surge currents.
• Optimized PCB layout. Space-saving design facilitates integration into compact automotive electronics.
• High-voltage resilience. Reliable protection against overcurrent events in high-voltage environments.
• Application versatility. Tailored for primary circuit protection in automotive electronics.

These features make the 823A Series indispensable for engineers designing electric vehicles (EVs), hybrid-electric vehicles (HEVs), and other advanced automotive power systems.

As automotive electronics and EV power systems continue to evolve, reliable overcurrent protection solutions are critical for ensuring safety, durability, and performance. The 823A Series enables engineers to meet these requirements while reducing design complexity and optimizing space utilization, helping drive the next generation of EV technology.