Hirose FX31 Series Floating Board to Board Connector

Hirose’s FX31 Series floating board-to-board connectors are engineered to deliver reliable, high-current power connections for demanding internal power applications. Designed for use in automotive systems and extended to harsh-environment equipment such as agricultural machinery and construction vehicles, the FX31 Series combines electrical robustness with mechanical flexibility to support long-term system reliability.

Featuring a 9.5 mm pitch and a 20 mm stacking height, the FX31 Series supports up to 25 A per pin at 800 V, making it well suited for compact, high-power designs where space efficiency and performance are critical. Its floating structure absorbs vibration and accommodates board-to-board misalignment up to ±0.5 mm in the X and Y axes and ±1.5 mm in the Z axis, reducing stress on solder joints and improving durability in high-shock, high-vibration environments.

The FX31 Series is optimized for internal power distribution where consistent electrical contact, ease of assembly, and tolerance to mechanical variation are essential. By combining high current capacity with floating alignment capability, the FX31 enables engineers to simplify designs, improve manufacturability, and enhance system reliability across ruggedized applications.