Littelfuse 466 Series SMD Fuse, Very Fast Acting, 1206, 125mA 125V

The Littelfuse 466 Series SMD Fuse is a highly reliable, very fast-acting surface-mount device designed for precision secondary circuit protection in modern electronics. Featuring an advanced high-temperature substrate body and a 100% tin over nickel over copper termination, it ensures excellent solderability and durability, even with lead-free solders and higher temperature reflow profiles. Its conformal coating element cover provides added environmental protection, enhancing the fuse's longevity and performance consistency.

This compact 1206 size (3216 metric) thin-film fuse is specifically engineered for space-constrained applications, offering a low profile ideal for height-sensitive designs. Its unique alloy-based element construction delivers superior inrush withstand characteristics (I²t) compared to traditional ceramic or glass-based 1206 chip fuses, providing more robust protection against transient overloads without nuisance blowing. The flat top surface facilitates reliable automated pick-and-place operations during assembly.

Key Performance Specifications

With a voltage rating of 125V AC/DC and a current rating of 125mA, this very fast-acting fuse responds swiftly to fault conditions. It boasts a high breaking capacity of 50A AC/DC, ensuring it can safely interrupt significant fault currents. The device operates reliably across a wide temperature range from -55°C to 90°C. Key electrical parameters include a nominal voltage drop of 634.37mV, a power dissipation of 0.0793W, and a cold resistance of 3.925Ω. For easy identification, the amperage rating is clearly marked on the top surface.

This fuse is a critical component for safeguarding sensitive circuitry, offering engineers a dependable solution that combines advanced materials, compact form factor, and superior electrical performance for demanding electronic applications.