Last-time-buy reality for the 0603SFF600FM/24-2
The Littelfuse 0603SFF600FM/24-2 is officially listed as Obsolete — the manufacturer no longer produces this exact order code.
What the 6 A fast-blow rating means for the board
Rated 6 A continuous at 24 V DC, this is a fast-blow fuse — it clears quickly on overcurrent, protecting downstream silicon from sustained fault energy. The 35 A breaking capacity at 24 V DC means it can safely interrupt a fault current up to that level without arcing or rupturing the 0603 ceramic body. The melting I²t of 1.125 is the energy required to open the fuse element — a key parameter for coordinating with downstream components that have their own surge-withstand ratings. A cold DC resistance of 0.01 Ohms keeps the voltage drop under 60 mV at full rated current, so the fuse does not steal headroom from the load.
0603 footprint and thermal envelope
Housed in the standard 0603 (1608 Metric) chip package, the 0603SFF600FM/24-2 measures 1.60 mm x 0.80 mm x 0.95 mm and is rated for surface-mount assembly on Tape & Reel. The operating temperature range spans -55°C to 125°C, covering the full industrial and most automotive under-hood ambient conditions without derating the current below 6 A.