SURFACE-MOUNT FUSES Slow-Blow Chip Fuses Available in industry standard 1206 and 0603 chip sizes, Littelfuse slow-blow chip fuses help provide overcurrent protection on systems that experience large and frequent current surges as part of their normal operation. The slow-blow chip fuses monolithic, multilayer design helps provide some of the highest current ratings available in the 1206 and 0603 footprints and enhances high-temperature performance in a wide range of circuit protection designs. The devices small size, high reliability and strong arc suppression characteristics make them suitable for overcurrent protection of power supplies, capacitor filter banks, Liquid Crystal Display (LCD) backlight inverters, electric motors and portable electronics. BENEFITS APPLICATIONS Time-delayed design prevents nuisance openings in Small motors systems pulsed and high inrush current applications Portable electronics Small size with high-current ratings Input power ports Strong arc suppression characteristics Power over Ethernet (PoE) Test equipment FEATURES POL converter protection Lead-free materials and RoHS compliant Computer drives Halogen free Displays (refers to: Br900ppm, Cl900ppm, Br+Cl1500ppm) Printers Monolithic multilayer design High-temperature performance -55C to +125C operating temperature range 102 Specifications subject to change without notice. 2018 Littelfuse, Inc. HF Halogen Free RoHS Compliant, ELV CompliantShape and 0.0630.008 Surface Mount Fuses Dimensions (1.600.20) 0.1260.008 in (mm) (3.200.20) Slow-Blow Chip Fuses Table FS1 Clear Time Characteristics 0.0380.008 (0.970.20) 0603SFS Series 1206SFS Series % of Rated Current Clear Time at 25C % of Rated Current Clear Time at 25C 0.0200.010 100% 4 hrs (min) 100% 4 hrs (min) (0.510.25) 200% 1 s (min) 120 s (max) 200% 1 s (min) 120 s (max) Recommended 0.173 (4.40) Pad Layout300% 0.1 s (min) 3 s (max) 300% 0.1 s (min) 3 s (max) in (mm) 0.059 800% (1.0A-1.5A) (1.50)0.0005 s (min) 0.05 s (max) 800% (1.0A-1.5A) 0.0016 s (min) 0.05 s (max) 800% (2.0A-5.0A) 0.001 s (min) 0.05 s (max) 800% (2.0A-8.0A) 0.002 s (min) 0.05 s (max) 0.071 (1.80) 0.057 Table FS2 Typical Electrical Characteristics, Dimensions and Recommended (1.45) Pad Layout Typical Max Electrical Characteristics Interrupt Ratings 0603 (1608 mm) Slow-Blow Chip Fuses Rated Nominal Nominal Current Cold DCR 2 I t Current (A) ()* 0.0310.006 Shape and Voltage (0.800.15) 0.0630.006 Dimensions 2 (1.600.15) Part Number (A sec) (V ) (A) DC in (mm) 0603SFS100F/32 1.0 0.200 0.093 32 50 0.0310.006 0603SFS150F/32 1.5 0.100 0.18 32 50 (0.800.15) 0603SFS200F/32 2.0 0.052 0.32 32 50 0.0140.006 (0.360.15) 0603SFS250F/32 2.5 0.041 0.63 32 50 0603SFS300F/32 3.0 0.031 0.87 32 50 0.110 Recommended (2.80) Pad Layout 0603SFS350F/32 3.5 0.021 1.20 32 50 0.024 in (mm) (0.60) 0603SFS400F/32 4.0 0.017 2.30 32 50 0.039 (1.00) 0603SFS450F/32 4.5 0.015 2.70 32 50 0.043 0603SFS500F/32 5.0 0.013 3.20 32 50 (1.09) PSR-27781 6.0 0.010 4.00 32 80 PSR-27893 7.0 0.008 5.00 32 80 PSR-28024 8.0 0.006 7.00 32 80 1206 (3216 mm) Slow-Blow Chip Fuses Shape and 0.0630.008 Typical Max Dimensions (1.600.20) 0.1260.008 in (mm) (3.200.20) Electrical Characteristics Interrupt Ratings Rated Nominal Nominal Current Cold DCR 2 I t Current (A) ()* 0.0380.008 Voltage (0.970.20) 2 Part Number (A sec) (V ) (A) DC 1206SFS100F/63 1.0 0.360 0.11 63 50 0.0200.010 1206SFS125F/63 1.25 0.200 0.22 63 50 (0.510.25) 1206SFS150F/63 1.5 0.150 0.23 63 50 Recommended 0.173 (4.40) Pad Layout 1206SFS200F/63 2.0 0.088 0.63 63 50 in (mm) 0.059 (1.50) 1206SFS250F/32 2.5 0.065 0.90 32 50 0.071 1206SFS300F/32 3.0 0.034 1.20 32 50 (1.80) 1206SFS350F/32 3.5 0.028 1.60 32 50 0.057 (1.45) 1206SFS400F/32 4.0 0.024 2.20 32 50 1206SFS450F/32 4.5 0.020 3.60 32 50 1206SFS500F/32 5.0 0.016 5.30 32 50 1206SFS550F/24 5.5 0.014 6.40 24 50 1206SFS600F/24 6.0 0.011 8.50 24 60 Shape and 0.0310.006 (0.800.15) 0.0630.006 Dimensions (1.600.15) 1206SFS700F/24 7.0 0.010 10.00 24 60 in (mm) 1206SFS800F/24 8.0 0.009 16.90 24 60 0.0310.006 * Measured at 10% of rated current and 25C ambient temperature. (0.800.15) 2 Melting I t at 0.001 sec clear time. 0.0140.006 (0.360.15) RoHS Compliant, ELV Compliant HF Halogen Free Specifications subject to change without notice. 2018 Littelfuse, Inc. Recommended 0.110 (2.80) Pad Layout 0.024 in (mm) (0.60) 0.039 (1.00) 0.043 (1.09)