2 A fast-blow fuse for 63 V DC rails
The F1206B2R00FSTR is a 2 A, 63 V DC rated fast-blow fuse in the 1206 footprint from KYOCERA AVX's Accu-Guard® II series. It is a board-mount SMD fuse — cartridge style excluded — meant for overcurrent protection on DC power inputs, point-of-load branches, and low-voltage distribution rails up to 63 V. The fast-blow response clears a fault quickly, which is useful when the downstream silicon has a narrow short-circuit withstand time.
Breaking capacity and inrush tolerance
Breaking capacity is 50 A at the rated 63 V DC — the fuse can safely interrupt a fault current up to 50 A without rupturing the package. The melting I²t is 0.03, a low value that means the fuse opens fast on short overcurrent pulses. For a 2 A rail with a capacitive input filter, check the inrush energy against that 0.03 A²s ceiling to avoid nuisance opens at power-up.
Sourced per RFQ — confirm current lead time and pricing against your BOM quantity at quote time.
Temperature range and approvals
The fuse carries cUL and UL approval — a requirement for many OEM compliance checklists.