Table FS1 — Clear Time Characteristics
0603SFS Series 1206SFS Series
% of Rated Current Clear Time at 25°C % of Rated Current Clear Time at 25°C
100% 4 hrs (min) — 100% 4 hrs (min) —
200% 1 s (min) 120 s (max) 200% 1 s (min) 120 s (max)
300% 0.1 s (min) 3 s (max) 300% 0.1 s (min) 3 s (max)
800% (1.0A-1.5A) 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)
Part Number
Typical
Electrical Characteristics
Max
Interrupt Ratings
Rated
Current
(A)
Nominal
Cold DCR
(Ω)*
Nominal
I
2
t
(A
2
sec)
†
Voltage
(V
DC
)
Current
(A)
0603SFS100F/32 1.0 0.200 0.093 32 50
0603SFS150F/32 1.5 0.100 0.18 32 50
0603SFS200F/32 2.0 0.052 0.32 32 50
0603SFS250F/32 2.5 0.041 0.63 32 50
0603SFS300F/32 3.0 0.031 0.87 32 50
0603SFS350F/32 3.5 0.021 1.20 32 50
0603SFS400F/32 4.0 0.017 2.30 32 50
0603SFS450F/32 4.5 0.015 2.70 32 50
0603SFS500F/32 5.0 0.013 3.20 32 50
Part Number
Typical
Electrical Characteristics
Max
Interrupt Ratings
Rated
Current
(A)
Nominal
Cold DCR
(Ω)*
Nominal
I
2
t
(A
2
sec)
†
Voltage
(V
DC
)
Current
(A)
1206SFS100F/63 1.0 0.360 0.11 63 50
1206SFS125F/63 1.25 0.200 0.22 63 50
1206SFS150F/63 1.5 0.150 0.23 63 50
1206SFS200F/63 2.0 0.088 0.63 63 50
1206SFS250F/32 2.5 0.065 0.90 32 50
1206SFS300F/32 3.0 0.034 1.20 32 50
1206SFS350F/32 3.5 0.028 1.60 32 50
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
1206SFS700F/24 7.0 0.010 10.00 24 60
1206SFS800F/24 8.0 0.009 16.90 24 60
* Measured at ≤10% of rated current and 25°C ambient temperature.
† Melting I
2
t at 0.001 sec clear time.
Table FS2 — Typical Electrical Characteristics, Dimensions and Recommended
Pad Layout
0603 (1608 mm) Slow-Blow Chip Fuses
1206 (3216 mm) Slow-Blow Chip Fuses
Shape and
Dimensions
in (mm)
Recommended
Pad Layout
in (mm)
Shape and
Dimensions
in (mm)
Recommended
Pad Layout
in (mm)
0.031±0.006
(0.80±0.15)
0.063±0.008
(1.60±0.20)
0.126±0.008
(3.20±0.20)
0.038±0.008
(0.97±0.20)
0.020±0.010
(0.51±0.25)
0.031±0.006
(0.80±0.15)
0.014±0.006
(0.36±0.15)
0.063±0.006
(1.60±0.15)
0.110
(2.80)
0.039
(1.00)
0.043
(1.09)
0.024
(0.60)
0.173
(4.40)
0.071
(1.80)
0.057
(1.45)
0.059
(1.50)
Shape and
Dimensions
in (mm)
Recommended
Pad Layout
in (mm)
Shape and
Dimensions
in (mm)
Recommended
Pad Layout
in (mm)
0.031±0.006
(0.80±0.15)
0.063±0.008
(1.60±0.20)
0.126±0.008
(3.20±0.20)
0.038±0.008
(0.97±0.20)
0.020±0.010
(0.51±0.25)
0.031±0.006
(0.80±0.15)
0.014±0.006
(0.36±0.15)
0.063±0.006
(1.60±0.15)
0.110
(2.80)
0.039
(1.00)
0.043
(1.09)
0.024
(0.60)
0.173
(4.40)
0.071
(1.80)
0.057
(1.45)
0.059
(1.50)
Surface Mount Fuses
Slow-Blow Chip Fuses
RoHS Compliant, ELV Compliant
HF
Halogen Free
Specifications subject to change without notice. ©2016 Littelfuse, Inc.
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