Surface Mount Fuses
NANO
2®
> Very Fast-Acting > 451/453 Series
RoHS
451/453 Series Fuse
Description
UL
®
®
®
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.
Features
temperature range
Agency Approvals
AGENCY
®
de-rating
AMPERE RANGE
62MA - 15A
62MA - 15A
1A - 10A
62MA - 5A
AGENCY FILE NUMBER
E10480
rating available (62mA
to 15A)
Applications
®
LR29862
NBK030205-E10480B
E10480
PS
E
UL
®
Electrical Characteristics for Series
% of Ampere
Rating
100%
200%
Ampere Rating
1/16 –15
1/16 –110
12 –15
Opening Time
4 hours, Minimum
5 sec., Maximum
20 sec., Maximum
equipment
protection
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/451.html or /453.html for current information.
47
Revision: May 27, 2008
451/453 Series
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
1
0.1
0.01
0.001
0.05 0.1
1
10
100
CURRENT IN AMPERES
1000
Soldering Parameters
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
200°C
60 – 120 secs
5°C/second max
5°C/second max
217°C
60 – 90 seconds
250
+0/-5
°C
20 – 40 seconds
5°C/second max
8 minutes Max.
260°C
260°C Peak
temperature,
3 seconds Max
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
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/451.html or /453.html for current information.
49
Revision: May 27, 2008
451/453 Series
NANO
2®
> Very Fast-Acting > 451/453 Series
Surface Mount Fuses
Product Characteristics
Body:
Ceramic
Terminations:
Tin-Lead Alloy
RoHS Compliant Terminations:
Gold-plated Caps (451 series)
Silver-plated Caps (453 series)
Brand, Ampere Rating
-55°C to 125°C
Level 1, J-STD-020C
MIL-STD-202, Method 208
MIL-STD-202, Method 302, Test Condition
A (10,000 ohms minimum)
Vibration
Moisture Resistance
Salt Spray
Resistance to Soldering
Heat
Thermal Shock
MIL
-STD-202, Method 107 Test
,
Condition B, 5 cycles, -65°C /
+125°C, 15 minutes @ each extreme
MIL
-STD-202, Method 213, Test I:
Deenergized. 100gn pk amplitude,
sawtooth wave 6ms duration, 3
cycles XYZ+xyz = 18 shocks
MIL
-STD-202, Method 201: 0.03”
amplitude, 10-55 Hz in 1 min. 2hrs
each XYZ=6hrs
MIL
-STD-202, Method 106, 10 cycles
MIL
-STD-202, Method 101, Test
Condition B (48hrs)
MIL
-STD-202, Method 210, Test
condition B (10 sec at 260°C)
Materials
Product Marking
Operating
Temperature
Moisture Sensitivity
Level
Solderability
Insulation
Resistance
(after Opening)
Mechanical Shock
Dimensions
6.10
(.240")
F
2.69
(.106")
2.69
(.106")
Part Numbering System
0451 001. M R L
SERIES
451 = Gold Plated Caps
453 = Silver Plated Caps
Refer to Electrical
characteristics table
M = 1000 pcs
N = 5000 pcs
7A
1.45
(.057")
6.86
(.270")
3.15
(.124")
2.95
(.116")
AMP Code
QUANTITY Code
PACKAGING Code
R = Tape and Reel
1.96
(.077")
Recommended pad layout
RoHS Compliant
Packaging
Packaging Option
12mm Tape and Reel
12mm Tape and Reel
Packaging Specification
EIA RS-481-2 (IEC 286, part 3)
EIA RS-481-2 (IEC 286, part 3)
Quantity
5000
1000
Quantity &
Packaging Code
NR
MR
451/453 Series
50
Revision: May 27, 2008
©2008 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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