Surface Mount Fuses
NANO
2®
> 157T Fuse and Holder Combination
157T Series – Standard Nano Fuse and Clip Assembly
Description
PS
E
The 157T Series Fuse/Clip assembly is a small, square,
Time-Lag, surface mount fuse that is assembled in surface
mountable fuse clips. 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.
The fuse clip and pre-installed fuse combination can
be automatically placed in PC Board in one efficient
manufacturing operation. It permits quick and easy
replacement of fuses without performing desoldering
process, even in the field and without exposing the PC
Board to detrimental effects of rework solder heat.
Agency Approvals
AGENCY
AGENCY FILE NUMBER
E14721
PS
E
AMPERE RANGE
0.375A ~ 5A
1A
1.5A-5A
Features
Time-Lag Fuse.
RoHS/Pb-Free solder
alloys and higher
temperature profiles
associated with
leadfree assembly.
Applications
on PC Board (Field
Replaceable)
Halogen-free
NBK030205-E10480A
NBK030205-E10480B
Electrical Characteristics for Series
% of Ampere
Rating
100%
200%
300%
800%
% of Ampere
Rating
Opening Time at 25ºC
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
Amp
Code
.375
.500
.750
001
01.5
002
02.5
003
03.5
004
005
Max Voltage
Rating (V)
125
125
125
125
125
125
125
125
125
125
125
Interrupting
Rating
(A)
Fuse
Furnished
0454.375
0454.500
0454.750
0454001.
045401.5
0454002.
045402.5
0454003.
045403.5
0454004.
0454005.
Nominal Cold
Resistance
(Ohms)
1.2214
0.7047
0.3602
0.2245
0.0934
0.0629
0.0452
0.0342
0.0226
0.0188
0.0138
Nominal
Melting
I
2
t (A
2
sec)
0.101
0.240
0.904
1.98
3.65
8.20
15.0
20.16
26.53
34.40
53.72
Agency Approvals
PS
E
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
1. Cold resistance measured at less than 10% of rated current at 23ºC.
2. I
2
t values stated for 8ms opening time.
4. Have special electrical characteristic needs? Contact Littelfuse to learn more about application specific options
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/157T.html for current information.
99
Revised: February 19, 2010
157T Series
157T Series
LITTELFUSE [ LITTELFUSE ]
