Surface Mount Fuses
NANO
2®
> Slo-Blo
®
> 449 Series
449 Series Fuse
Description
PS
E
The lead free NANO
2
Slo-Blo
®
fuse is RoHS compliant,
Halogen Free and 100% lead-free. This product is fully
compatible with lead-free solder alloys and higher
temperature profiles associated with lead-free assembly.
The Slo-Blo
®
design 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
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E10480
PS
E
Free
®
temperature range
de-rating
AMPERE RANGE
375mA - 5A
ratings available
NBK030205
1A - 5A
Applications
Secondary protection for space constrained applications:
Electrical Characteristics for Series
% of Ampere
Rating
100%
200%
300%
800%
Opening Time
4 hours, Minimum
1 sec., Min.; 60 sec., Max.
0.2 sec., Min.; 3 sec., Max
0.02 sec., Min.; 0.1 sec., Max.
equipment
protection
Electrical Specifications by Item
Ampere
Rating
(A)
0.375
0.500
0.750
1.00
1.50
2.00
2.50
3.00
3.50
4.00
5.00
Max
Voltage
Rating
(V)
125
125
125
125
125
125
125
125
125
125
125
PSE: 100 amperes
@100 VAC
50 amperes @125 VAC/
VDC
Interrupting
Rating
Nominal Cold
Resistance
(Ohms)
1.5130
0.7633
0.4080
0.2516
0.1186
0.0708
0.0400
0.0352
0.0261
0.0227
0.0171
Nominal
Melting
2
I t (A
2
sec)
0.088
0.258
0.847
1.76
4.70
6.76
13.18
19.55
32.70
40.80
59.59
Agency Approvals
PS
E
Amp Code
.375
.500
.750
001.
01.5
002.
02.5
003.
03.5
004.
005.
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
Notes: - l
2
t calculated at 8ms. Resistance is measured at 10% of rated current, 25ºC
© 2012 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/449.html for current information.
Revised: June 3, 2012
449 Series
449 Series
LITTELFUSE [ LITTELFUSE ]
