SFH series 20 A fast-blow fuse
The Littelfuse 1206SFH200F/24-2 is a 20 A, 24 V DC fast-blow fuse from the SFH series, designed for surface-mount board-level overcurrent protection. Rated breaking capacity of 100 A at the rated voltage means it can safely interrupt a fault current up to that level without rupturing or sustaining an arc.
Parametric fit and board integration
The 1206 (3216 Metric) footprint is a common surface-mount fuse package, allowing direct replacement on existing PCB layouts that accept this standard size. With a DC cold resistance of 0.003 ohms, voltage drop across the fuse at rated current is negligible — about 60 mV — minimizing power dissipation in high-current paths. Melting I²t of 56 provides the energy let-through characteristic needed for selective coordination with downstream components in a protection scheme.
Sourcing and lifecycle reality
UL approval is on file, supporting compliance with North American safety standards for the original design.