Obsolete — sourcing the 0603SFF200F/32-2 for BOM fill
The Littelfuse 0603SFF200F/32-2 is officially listed as obsolete. This means the manufacturer no longer produces it, and the only supply channel is independent surplus or broker inventory.
2 A fast-blow in 0603 — what the ratings mean for circuit protection
Rated 2 A at 32 V DC, this is a fast-blow chip fuse in the 0603 (1608 Metric) surface-mount package. The 35 A breaking capacity at rated voltage means it can safely interrupt a fault current up to that level without rupturing the package. The melting I²t of 0.06 A²s indicates how much energy the fuse absorbs before opening — useful for sizing the fuse against inrush current from a capacitive load or a DC-DC converter input. A downstream capacitor bank with a higher I²t surge will nuisance-blow this part. DC cold resistance is 0.052 Ohms, which at 2 A produces a voltage drop of roughly 0.1 V — negligible in a 32 V rail but a factor in low-voltage circuits where every millivolt of headroom matters.
UL recognition and temperature range for deployment
UL recognized — the approval agency listed on the spec — confirms the fuse meets UL 248-14 for branch-circuit protection, which is the standard specifiers look for in North American panel and PCB designs. The SFF series is board-mount (cartridge style excluded), meaning it solders directly to the PCB without a holder.
Sourcing an obsolete 0603 SMD fuse against an RFQ
Because the 0603SFF200F/32-2 is obsolete, availability is limited to surplus and broker channels. Each lot is confirmed at quote time — no standing stock is held. No pin-compatible drop-in replacement from Littelfuse is documented. A cross-reference search against the 2 A, 32 V, fast-blow, 0603 footprint is the practical next step for a BOM revision.