NANO
2®
> Slo-Blo
®
> 452/454 Series
Surface Mount Fuses
452/454 Series Fuse
Description
PS
E
®
®
The NANO
2
Slo-Blo
®
fuse has enhanced inrush withstand
characteristics over the NANO
2
Fast-Acting fuse. The
unique time delay feature of this fuse design helps solve
the problem of nuisance “opening” by accommodating
inrush currents that normally cause a fast-acting fuse to
open.
Features
de-rating
Agency Approvals
AGENCY
®
AGENCY FILE NUMBER
E10480
AMPERE RANGE
375MA - 5A
375MA - 5A.
1A - 5A
temperature range
Applications
®
LR29862
NBK030205-E10480B
PS
E
Electrical Characteristics for Series
% of Ampere
Rating
100%
200%
Opening Time
4 hours, Minimum
1 sec., Min.; 60 sec., Max.
equipment
protection
800%
0.02 sec., Min.; 0.1 sec., Max.
Electrical Specifications by Item
Ampere
Rating
(A)
Max
Voltage
Rating
(V)
Interrupting
Rating
Nominal Cold
Resistance
(Ohms)
1.2000
Nominal
Melting
I
2
t (A
2
sec)
0.101
0.240
0.904
001.
2.00
001.
002.
1.98
8.20
20.16
0.0224
4.00
004.
0.0186
Agency Approvals
®
®
Amp Code
PS
E
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
452/454 Series
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/452.html or /454.html for current information.
59
Revision: November 4, 2008
NANO
2®
> Slo-Blo
®
> 452/454 Series
Surface Mount Fuses
Temperature Rerating Curve
Average Time Current Curves
3/8A
1/2A
3/4A
1A
1 1/2A
2A
2 1/2A
3A
3 1/2A
4A
5A
1000
100
TIME IN SECONDS
10
1
0.1
0.01
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
)
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
temperature,
8 minutes Max.
452/454 Series
60
Revision: November 4, 2008
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/452.html or /454.html for current information.
NANO
2®
> Slo-Blo
®
> 452/454 Series
Surface Mount Fuses
Product Characteristics
Materials
Product Marking
Operating
Temperature
Moisture
Sensitivity Level
Solderability
Insulation
Resistance (after
Opening)
Mechanical Shock
Thermal Shock
Vibration
Moisture Resistance
Salt Spray
Resistance to Soldering
Heat
Dimensions
6.10
(.240")
F
Part Numbering System
0452 001. M R L
SERIES
AMP Code
The dot is positioned at the end of the
number sequence with whole ratings
and within for fractional ratings.
Example:
.375
T
1A
2.69
(.106")
2.69
(.106")
1.45
(.057")
QUANTITY Code
6.86
(.270")
3.15
(.124")
2.95
(.116")
PACKAGING Code
RoHS Compliant
1.96
(.077")
Recommended pad layout
Packaging
Packaging Option
Packaging Specification
Quantity
Quantity &
Packaging Code
1000
©2008 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/452.html or /454.html for current information.
61
Revision: November 4, 2008
452/454 Series
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