Surface Mount Fuses
NANO
2®
> Very Fast-Acting > 451/453 Series
451/453 Series Fuse
Description
PS
E
The Nano
2
SMF Fuse is a very small, Wire-in-Air (WIA)
square shape surface mount fuse which is very suitable
for the secondary side circuit over-current protection
applications and is designed for PCB using surface mount
technology.
de-rating
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E10480
LR29862
PS
E
AMPERE RANGE
6.3A - 15A
62mA - 15A
1A - 5A
6.3A - 10A
62mA - 5A
rating available (62mA
to 15A)
temperature range
Applications
NBK030205-E10480B
NBK101105-E184655
E10480
Electrical Characteristics for Series
% of Ampere
Rating
100%
200%
Ampere Rating
1/16 –15
1/16 –10
12 –15
Opening Time
4 hours, Minimum
5 sec., Maximum
20 sec., Maximum
equipment
protection
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/451.html
or /453.html for current information.
57
Revised: June 1, 2009
451/453 Series
451/453 Series
Features
Surface Mount Fuses
Introduction to Circuit Protection
Transientology
NANO
2®
> Very Fast-Acting > 451/453 Series
Electrical Specifications by Item
Ampere
Rating
(A)
0.062
0.080
0.100
0.125
0.160
0.200
0.250
0.315
0.375
0.400
0.500
0.630
0.750
0.800
1.00
1.25
1.50
1.60
2.00
2.50
3.00
3.15
3.50
4.00
5.00
6.30
7
.00
8.00
Max
Voltage
Rating
(V)
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
Nominal Cold
Resistance
(Ohms)
5.5000
4.0500
3.1000
1.7000
1.2157
0.8372
0.5765
0.3918
0.6100
0.5600
0.4200
0.3050
0.2450
0.2120
0.1530
0.0780
0.0630
0.0580
0.0367
0.0286
0.0227
0.0215
0.0200
0.0160
0.0125
0.0096
0.0090
0.0077
Nominal
Melting
2
I t (A
2
sec)
0.00019
0.00033
0.00138
0.00286
0.0048
0.0089
0.0158
0.0311
0.0425
0.0484
0.0795
0.143
0.185
0.271
0.459
0.664
0.853
1.060
0.530
1.029
1.650
1.920
2.469
3.152
5.566
9.170
10.32
20.23
Agency Approvals
PS
E
Amp
Code
.062
.080
.100
.125
.160
.200
.250
.315
.375
.400
.500
.630
.750
.800
001.
1.25
01.5
01.6
002.
02.5
003.
3.15
03.5
004.
005.
06.3
007
.
008.
Interrupting
Rating
PSE: 100 amperes
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
10.0
010.
125
PSE: 100 amperes
0.0056
26.46
x
x
x
12.0
15.0
012.
015.
65
65
0.0049
0.0037
47
.97
97
.82
x
x
x
x
Notes:
- l
2
t calculated at 8ms.
- Resistance is measured at 10% of rated current, 25ºC
451/453 Series
58
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/451.html
or /453.html for current information.
Surface Mount Fuses
NANO
2®
> Very Fast-Acting > 451/453 Series
Temperature Rerating Curve
Average Time Current Curves
.062A
.125A
.160A
.200A
.250A
.315A
.375A
.500A
.750A
1A
1.5A
2A
2.5A
3A
3.5A
4A
5A
7A
8A
10A
12A
15A
100
10
TIME IN SECONDS
0.1
0.01
Note:
continuous operation.
0.001
0.05 0.1
1
10
100
CURRENT IN AMPERES
1000
Soldering Parameters
t
P
Ramp-up
Critical Zone
T
L
to T
P
Reflow Condition
- Temperature Min (T
s(min)
)
Pre Heat
- Temperature Max (T
s(max)
)
- Time (Min to Max) (t
s
)
Average ramp up rate (Liquidus Temp
(T
L
) to peak
T
S(max)
to T
L
- Ramp-up Rate
Reflow
- Temperature (T
L
) (Liquidus)
- Temperature (t
L
)
Pb – Free assembly
150°C
60 – 120 secs
5°C/second max.
5°C/second max.
217°C
60 – 90 seconds
250
+0/-5
T
P
T
L
Temperature
200°C
T
S(max)
Preheat
t
L
Ramp-down
T
S(min)
t
S
25
time to peak temperature
(t 25ºC to peak)
Time
Peak Temperature (T
P
)
Time within 5°C of actual peak
Temperature (t
p
)
Ramp-down Rate
Time 25°C to peak Temperature (T
P
)
Do not exceed
Wave Soldering Parameters
°C
20 – 40 seconds
5°C/second max.
8 minutes max.
260°C
Temperature,
10 seconds max.
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/451.html
or /453.html for current information.
59
451/453 Series
451/453 Series
1
Surface Mount Fuses
Introduction to Circuit Protection
Transientology
NANO
2®
> Very Fast-Acting > 451/453 Series
Product Characteristics
Body:
Ceramic
Terminations
RoHS Compliant Terminations:
Silver-plated Caps (453 series)
Product Marking
Operating
Temperature
Moisture Sensitivity
Level
Solderability
Insulation
Resistance
(after Opening)
A (10,000 ohms minimum)
-55°C to 125°C
Vibration
Moisture Resistance
Salt Spray
Resistance to Soldering
Heat
Condition B (48hrs)
condition B (10 sec at 260°C)
Mechanical Shock
sawtooth wave 6ms duration, 3
Thermal Shock
Condition B, 5 cycles, -65°C /
+125°C, 15 minutes @ each extreme
Materials
Dimensions
6.10
(.240")
F
2.69
(.106")
2.69
(.106")
Part Numbering System
0451 001. M R L
SERIES
AMP Code
7A
1.45
(.057")
6.86
(.270")
3.15
(.124")
2.95
(.116")
characteristics table
QUANTITY Code
PACKAGING Code
RoHS Compliant & Halogen Free
NOTE: “L suffix applies to 451 series only
”
1.96
(.077")
Recommended pad layout
Packaging
Packaging Option
Packaging Specification
Quantity
5000
1000
Quantity &
Packaging Code
451/453 Series
60
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/451.html
or /453.html for current information.
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