SURFACE-MOUNT FUSES
Fast-Acting Chip Fuses
Fast-acting
chip
fuses
help
provide
overcurrent
protection for systems using DC power sources up to
63V
DC
. The fuse’s monolithic, multilayer design helps
provide the highest hold current in the smallest footprint,
reduce
diffusion-related
aging,
improve
product
reliability and resilience, and enhance high-temperature
performance in a wide range of circuit designs.
These RoHS-compliant surface-mount devices offer
strong arc suppression characteristics and help facilitate
the development of more reliable, high-performance
consumer electronics such as laptops, multimedia devices,
cell phones and other portable electronics.
BENEFITS
• Small size with high current ratings
• Temperature stability
• High reliability and resilience
• Strong arc suppression characteristics
APPLICATIONS
• Laptops
• Digital cameras
• Cell phones
• Printers
• DVD players
• Portable electronics
• Game systems
• LCD monitors
• Scanners
FEATURES
• Lead-free and RoHS compliant
• Halogen free
(refers to: Br900ppm, Cl900ppm, Br+Cl1500ppm)
• Monolithic, multilayer design
• High-temperature performance
• -55°C to +125°C operating temperature range
RoHS Compliant, ELV Compliant
HF
Halogen Free
Specifications subject to change without notice. ©2016 Littelfuse, Inc.
89
Surface Mount Fuses
Fast-Acting Chip Fuses
Table FF1 — Clear Time Characteristics
% of Rated Current
100%
250%
400%
Clear Time at 25°C
4 hrs (min)
5 s (max)
0.05 s (max)
(1.00±0.10)
Dimensions
0402 (1005mm) Fast-Acting Chip Fuses
(0.51±0.10)
Table
and
— Typical Electrical Characteristics, Dimensions and Recommended
Shape
FF2
Dimensions
in (mm)
Pad Layout
Shape and
0.020±0.004
(0.51±0.10)
0.020±0.004
(0.51±0.10)
0.039±0.004
(1.00±0.10)
0.039±0.004
0.020±0.004
in (mm)
Shape and
Dimensions
in (mm)
Typical Electrical Characteristics
Rated
Current
(A)
1.00
1.50
2.00
3.00
4.00
Nominal Nominal
Cold DCR
I
2
t
2
sec)
†
(Ω)*
(A
0.120
0.056
0.035
0.021
0.014
0.0170
0.0490
0.0700
0.1250
0.2250
Max Interrupt Ratings
Voltage
(V
DC
)
24
24
24
24
24
Current
(A)
35
35
35
35
35
0.020±0.004
0.010±0.004 0.039±0.004
0.020±0.004
(0.51±0.10)
(0.25±0.10) (1.00±0.10)
(0.51±0.10)
0.010±0.004
0.063
(0.25±0.10)
(1.60)
0.016
(0.40)
0.010±0.004
0.063
(0.25±0.10)
(1.60)
0.016
(0.40)
0.063
(1.60)
0.016
(0.40)
Recommended
Pad Layout
in (mm)
Recommended
Pad Layout
in (mm)
Recommended
Pad Layout
in (mm)
Part Number
0.020±0.004
(0.51±0.10)
0402SFF100F/24
0402SFF150F/24
0402SFF200F/24
0402SFF300F/24
0402SFF400F/24
0.028
(0.70)
0.028
(0.70)
0.028
(0.70)
0.024
(0.60)
0.024
(0.60)
0.024
(0.60)
0.063±0.006
(0.80±0.15)
0603 (1608mm) Fast-Acting Chip Fuses
Dimensions
(1.60±0.15)
Shape and
0.031±0.006
in (mm)
Shape and
Dimensions
in (mm)
Shape and
Dimensions
in (mm)
Typical Electrical Characteristics
Rated
Current
(A)
0.50
0.75
1.00
1.50
2.00
2.50
3.00
3.50
4.00
5.00
6.00
Nominal Nominal
Cold DCR
I
2
t
2
sec)
†
(Ω)*
(A
0.485
0.254
0.147
0.059
0.044
0.032
0.025
0.024
0.018
0.013
0.010
0.0029
0.0064
0.0160
0.0300
0.0600
0.1150
0.1900
0.2950
0.4000
0.7000
1.1250
Max Interrupt Ratings
Voltage
(V
DC
)
63
63
63
63
32
32
32
32
32
32
24
Current
(A)
35
35
35
35
35
35
35
35
35
35
35
0.031±0.006
(0.80±0.15)
0.031±0.006
(0.80±0.15)
0.063±0.006
(1.60±0.15)
0.031±0.006
(0.80±0.15)
Part Number
0603SFF050F/32
0603SFF075F/32
0603SFF100F/32
0603SFF150F/32
0603SFF200F/32
0603SFF250F/32
0.063±0.006
(1.60±0.15)
0.031±0.006
0.014±0.006
(0.80±0.15)
(0.36±0.15)
0.014±0.006
0.110
(0.36±0.15)
(2.80)
0.031±0.006
(0.80±0.15)
Recommended
Pad Layout
in (mm)
Recommended
Pad Layout
in (mm)
Recommended
Pad Layout
in (mm)
0.024
(0.60)
0.110
0.014±0.006
(2.80)
(0.36±0.15)
0.024
(0.60)
0.110
(2.80)
0.024
(0.60)
0.039
(1.00)
0.039
(1.00)
0.039
(1.00)
0603SFF300F/32
0603SFF350F/32
0603SFF400F/32
0603SFF500F/32
0603SFF600F/24
0.043
(1.09)
0.043
(1.09)
0.043
(1.09)
1206 (3216mm) Fast-Acting Chip Fuses
Typical Electrical Characteristics
Rated
Current
(A)
0.50
0.75
1.00
1.50
1.75
2.00
2.50
3.00
4.00
5.00
6.00
7.00
8.00
6.00
7.00
8.00
Nominal Nominal
Cold DCR
I
2
t
2
sec)
†
(Ω)*
(A
0.730
0.513
0.220
0.120
0.100
0.050
0.035
0.031
0.022
0.015
0.013
0.011
0.008
0.013
0.011
0.008
0.0021
0.0052
0.0120
0.0250
0.0450
0.0700
0.1400
0.2200
0.3800
0.6000
1.0000
1.7500
2.5000
1.0000
1.7500
2.5000
Max Interrupt Ratings
Voltage
(V
DC
)
63
63
63
63
63
63
32
32
32
32
32
32
32
24
24
24
Current
(A)
50
50
50
50
50
50
50
50
45
45
50
50
50
45
45
45
Shape and
Dimensions
in (mm)
Shape and
Dimensions
in (mm)
Shape and
Dimensions
in (mm)
0.063±0.008
(1.60±0.20)
0.063±0.008
(1.60±0.20)
0.063±0.008
(1.60±0.20)
0.126±0.008
(3.20±0.20)
0.126±0.008
(3.20±0.20)
0.126±0.008
(3.20±0.20)
0.043±0.008
(1.10±0.20)
0.043±0.008
(1.10±0.20)
0.020±0.010
(0.51±0.25)
0.043±0.008
(1.10±0.20)
Part Number
1206SFF050F/63
1206SFF075F/63
1206SFF100F/63
1206SFF150F/63
1206SFF175F/63
1206SFF200F/63
1206SFF250F/32
1206SFF300F/32
1206SFF400F/32
1206SFF500F/32
1206SFF600F/32
1206SFF700F/32
1206SFF800F/32
1206SFF600F/24
1206SFF700F/24
1206SFF800F/24
Recommended
Pad Layout
in (mm)
Recommended
Pad Layout
in (mm)
Recommended
Pad Layout
in (mm)
0.020±0.010
0.173
(0.51±0.25)
(4.40)
0.059
(1.50)
0.020±0.010
0.173
(0.51±0.25)
(4.40)
0.059
(1.50)
0.173
(4.40)
0.059
(1.50)
0.071
(1.80)
0.071
(1.80)
0.071
(1.80)
0.057
(1.45)
0.057
(1.45)
0.057
(1.45)
* Measured at
≤10%
of rated current and 25°C ambient temperature.
† Melting I
2
t at 0.001 sec clear time.
90
Specifications subject to change without notice. ©2016 Littelfuse, Inc.
HF
Halogen Free
RoHS Compliant, ELV Compliant
Surface Mount Fuses
Fast-Acting Chip Fuses
Figures FF1-FF6 — Family Performance Curves
Figure FF1
0402SFF Average Time Current Curves
2. 0
3 . 0A
4.0A
A
1.0
A
1.5
A
10
Figure FF2
0402SFF I²t vs. t Curves
1,000
4.0A
3.0A
2.0A
1.5A
1.0A
100
1
10
Clear-Time (s)
0.1
1
I²t (A²s)
0.1
0.01
0.01
0.001
0.001
0.0001
0.1
1
10
100
0.0001
0.0001
0.001
0.01
0.1
1
10
Current (A)
Time (s)
Note:
Curves are nominal.
Figure FF3
0603SFF Average Time Current Curves
0.5
A
0.7
5
1.0 A
A
1.5
2 . 0A
2. 5 A
3.0A
3 . 5A
4.0A
5.0 A
6 .0A
A
Figure FF4
0603SFF I²t vs. t Curves
10000
10
1000
1
100
6.0A
5.0A
4.0A
3.5A
3.0A
2.5A
2.0A
1.5A
1.0A
0.75A
0.5A
Clear-Time (s)
10
0.1
I²t (A²s)
1
0.1
0.01
0.01
0.001
0.1
1
10
100
0.001
0.001
0.01
0.1
1
10
Current (A)
Note:
Curves are nominal.
Time (s)
RoHS Compliant, ELV Compliant
HF
Halogen Free
Specifications subject to change without notice. ©2016 Littelfuse, Inc.
91
Surface Mount Fuses
Fast-Acting Chip Fuses
Figures FF1-FF6 — Family Performance Curves
Figure FF5
1206SFF Average Time Current Curves
A
0.7
5A
1.0
A
1.5
1.7 A
2.05 A
2. 5 A
3.0A
4 . 0A
5.0 A
6 .0A
7.0 A
8 .0A
A
0.5
10
10000
8.0A
7.0A
6.0A
5.0A
4.0A
3.0A
2.5A
2.0A
1.75A
1.5A
1.0A
0.75A
0.5A
(Cont’d)
Figure FF6
1206SFF I²t vs. t Curves
1000
1
100
Clear-Time (s)
10
0.1
I²t (A²s)
1
0.1
0.01
0.01
0.001
0.1
1
10
100
0.001
0.001
0.01
0.1
1
10
Current (A)
Note:
Curves are nominal.
Time (s)
Notice:
Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining
or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may
result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall
be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising
out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject
to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse.
92
Specifications subject to change without notice. ©2016 Littelfuse, Inc.
HF
Halogen Free
RoHS Compliant, ELV Compliant
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