Fast Acting Fuses
Fast-acting fuses help provide overcurrent protection on systems
using DC power sources up to 63VDC. The fuse's monolithic,
multilayer design provides the highest hold current in the
smallest footprint, reduces diffusion-related aging, improves
product reliability and resilience, and enhances high temperature
performance. This helps facilitate the development of more
reliable, high-performance consumer electronics such as laptops,
multimedia devices, cell phones, and other portable electronics.
Benefits
Features
• Small size with high current ratings
• RoHS compliant
• Excellent temperature stability
• Monolithic, multilayer design
• High reliability and resilience
• High temperature performance
• Strong arc suppression characteristics
• -55°C to +125°C operating range
Applications
• Laptops
• Printers
• Game systems
• Digital cameras
• DVD players
• LCD monitors
• Cell phones
• Portable electronics
• Scanners
64
Table FF1 - Clear Time Characteristics for Fast Acting Fuses
% of rated current
Clear time at 25°C
100%
250%
400%
4 hours min.
5 seconds max.
0.05 seconds max.
Table FF2 - Typical Electrical Characteristics, Demensions and Recommended Pad Layout for Fast Acting Fuses
0402 (1005mm) Fast Acting Surface-mount Chip Fuses
Shape and
Dimensions
Inch (mm)
Recommended
Pad Layout
Inch (mm)
Part
Number
Typical Electrical
Characteristics*
Rated Current Nominal Cold DCR†
(A)
(Ω)
0.063
(1.60)
0.016
(0.40)
0.028
(0.70)
0402SFF050F/24
0.50
0.380
0402SFF075F/24
0.75
0.210
0402SFF100F/24
1.00
0.120
0402SFF150F/24
1.50
0.056
0402SFF200F/24
2.00
0.035
0402SFF300F/24
3.00
0.021
0402SFF400F/24
4.00
0.014
Max
Interrupt Ratings*
Voltage
(VDC)
Current
(A)
24
35
0.024
(0.60)
0603 (1608mm) Fast Acting Surface-mount Chip Fuses
Part
Number
Shape and
Dimensions
Inch (mm)
Recommended
Pad Layout
Inch (mm)
Rated Current Nominal Cold DCR†
(A)
(Ω)
0.110
(2.80)
0.024
(0.60)
0.039
(1.00)
0.043
(1.09)
1206 (3216mm) Fast Acting Surface-mount Chip Fuses
0603SFF050F/32
0603SFF075F/32
0603SFF100F/32
0603SFF150F/32
0603SFF200F/32
0603SFF250F/32
0603SFF300F/32
0603SFF350F/32
0603SFF400F/32
0603SFF500F/32
0603SFF600F/24
Part
Number
Shape and
Dimensions
Inch (mm)
Recommended
Pad Layout
Inch (mm)
0.50
0.75
1.00
1.50
2.00
2.50
3.00
3.50
4.00
5.00
6.00
0.485
0.254
0.131
0.059
0.044
0.032
0.025
0.024
0.018
0.013
0.010
Typical Electrical
Characteristics*
Rated Current Nominal Cold DCR†
(A)
(Ω)
0.173
(4.40)
0.059
(1.50)
0.071
(1.80)
0.057
(1.45)
65
Typical Electrical
Characteristics*
1206SFF050F/63
1206SFF075F/63
1206SFF100F/63
1206SFF150F/63
1206SFF175F/63
1206SFF200F/63
1206SFF250F/32
1206SFF300F/32
1206SFF400F/32
1206SFF500F/32
1206SFF600F/24
1206SFF700F/24
1206SFF800F/24
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
* Measured at 25°C
† Measured at 10% of rated current
0.500
0.330
0.220
0.120
0.100
0.050
0.035
0.031
0.022
0.015
0.013
0.011
0.008
Max
Interrupt Ratings*
Voltage
(VDC)
Current
(A)
50
32
35
24
Max
Interrupt Ratings*
Voltage
(VDC)
Current
(A)
63
50
32
45
24
Fast Acting Fuses
Figures FF1-FF6 - Family Average Clear Time
Figure FF2 - 0402SFF Family I2T vs. Clear Time
Figure FF1 - 0402SFF Family Average Clear Time
10
A
B
C
D
E
F
G
1
10000
= 4A
= 3A
= 2A
= 1.5A
= 1A
= .75A
= .5A
1000
E
100
F
I Square t (A^2 Sec)
Clear Time (Sec)
0.1
0.01
0.001
10
G
1
A
0.1
B
C
0.01
D
A
B
C
D
E
F
G
0.001
0.0001
A
G
0.00001
F
1
E
D
C
0.0001
B
= 4A
= 3A
= 2A
= 1.5A
= 1A
= .75A
= .5A
0.00001
10
0.00001
100
0.0001
0.001
0.01
0.1
1
10
100
Clear Time (Second)
Current (A)
Figure FF4 - 0603SFF Family I2T vs. Clear Time
Figure FF3 - 0603SFF Family Average Clear Time
100
A
B
C
D
E
F
G
H
I
J
K
10
6A
5A
4A
3.5A
3A
2.5A
2A
1.5A
1A
.75A
.5A
10000
1000
100
I Square t (A^2 Sec)
Clear Time (Sec)
1
=
=
=
=
=
=
=
=
=
=
-
0.1
0.01
10
1
A
C
0.1
E
G
0.01
B
D
F
H
A
B
C
D
E
F
G
H
I
J
K
I
J
0.001
0.001
K
0.0001
0.0001
K
J
I
H
G
F
E D C
A
B
1
6A
5A
4A
3.5A
3A
2.5A
2A
1.5A
1A
.75A
.5A
0.00001
0.0001
0.001
0.01
0.1
1
10
Clear Time (Second)
0.00001
0.5
=
=
=
=
=
=
=
=
=
=
-
10
100
Current (A)
66
... Cont'd
Figures FF1-FF6 - Family Average Clear Time
Figure FF6 - 1206SFF Family I2T vs. Clear Time
Figure FF5 - 1206SFF Family Average Clear Time
100
10
Clear Time (Sec)
1
0.1
8A
7A
6A
5A
4A
3A
2.5A
2A
1.75A
1.5A
1A
.75A
.5A
100000
10000
1000
100
I Square t (A^2 Sec)
A =
B =
C =
D =
E =
F =
G=
H =
I =
J =
K L =
M=
0.01
10
1
0.1
0.01
0.001
A
B
C
E
G
I
D
F
A =
B =
C =
D =
E =
F =
G=
H =
I =
J =
K L =
M=
H
J
K
L
0.0001
L
M
0.00001
0.5
1
K
J
10
I
G
H
F
E D
CB
0.001
A
M
0.0001
0.00001
0.0001
100
0.001
0.01
0.1
1
8A
7A
6A
5A
4A
3A
2.5A
2A
1.75A
1.5A
1A
.75A
.5A
10
Clear Time (Second)
Current (A)
Environmental Specifications
Operating Temperature
Mechanical Vibration
Mechanical Shock
Thermal Shock
Resistance to Soldering Heat
Solderbility
Moisture Resistance
Salt Spray
-55ºC to +125ºC
Withstands 5-3000 Hz at 30 Gs when evaluated per Method 204 of MIL-STD-202
Withstands 1500 Gs, 0.5 millisecond half-sine pulses when evaluated per Method 213 of MIL-STD-202
Withstands 100 cycles from -65ºC to +125ºC when evaluated per Method 107 of MIL-STD-202
Withstands 60 seconds at +260ºC when evaluated per Method 210 of MIL-STD-202
Meets 95% minimum coverage requirement when evaluated per Method 208 of MIL-STD-202
Withstands 10 cycles when evaluated per Method 106 of MIL-STD-202
Withstands 48-hour exposure when evaluated per Method 101 of MIL-STD-202
Material Specifications
Construction Body Material
Termination Material
Fuse Element
Terminal Strength
Ceramic
Silver, Nickel, Tin
Silver
Hanging test: 0603: 0.5kg 30 seconds; 1206 1.5kg, 30 seconds; 0402 part types meet 2-pound push test
Electrical Specifications
Thermal Derating Current
Insulation Resistance after Opening
110
105
100
95
90
% of Hold Current
85
80
75
70
65
Current Carrying Capacity
60
55
50
45
40
20,000Ω minimum @ rated voltage. Fuse clearing
under low voltage conditions may result in lower
post-clearing insulation values. Under normal fault
conditions values. Under normal fault conditions
Raychem fuses provide sufficient insulation
resistance for circuit protection.
Withstands 100% rated current at +25ºC
ambient for 4 hours when evaluated per
MIL-PRF-23419
35
30
25
Packaging Specifications
20
15
10
5
0
-55
-35
-15
5
25
45
65
85
Maximum Operating Temperature (°C)
67
105
125
Chip Size
0402 (1005)
0603 (1608)
1206 (3216)
Parts on 7-inch (178 mm) Reel
10,000
4,000
3,000
100
UL
File # E197536
Part Numbering System for Fast Acting Fuses
1206SFF400F/24-2
Fast Acting Fuses
Agency Approvals for Fast Acting Fuses
Packaging
-2 = Tape and Reel
Voltage Rating (V)
Special Code
F = RoHS Compliant
M = Marked
Rated Current
050 = 0.50 Amps
400 = 4 Amps
Fuse Blow Type
F = Fast Acting
S = Slow Blow
SF = Surface Mount Fuse
Size (1206, 0603, 0402)
WARNING:
All information, including illustrations, is believed to be reliable. Users, however, should independently evaluate the suitability of
each product for their application. Tyco Electronics Corporation makes no warranties as to the accuracy or completeness of the
information, and disclaims any liability regarding its use. Tyco Electronics’ only obligations are those in the Company’s Standard
Terms and Conditions of Sale for this product, and in no case will Tyco Electronics be liable for any incidental, indirect, or consequential
damages arising from the sale, resale, use, or misuse of the product. Specifications are subject to change without notice. In addition,
Tyco Electronics reserves the right to make changes without notification to Buyer—to materials or processing that do not affect
compliance with any applicable specification.
68