Surface Mount Fuses
NANO
2®
> 157 Fuse and Holder Combination
157 Series – Standard Nano Fuse and Clip Assembly
Description
PS
E
The 157 Series – Standard Nano Fuse/Clip assembly is a
small, square, very fast acting surface mount fuse that is
assembled in surface mountable fuse clips. 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.
Features
Agency Approvals
Agency
Agency File number
e14721
PS
E
• Surface Mountable, Very • Easily replaceable on PC
Board (Field Replaceable)
Fast Acting Fuse.
Ampere rAnge
0.062A ~ 10A
1A
1.5A - 5A
6.3A - 10A
nbK030205-e10480A
nbK030205-e10480b
nbK101105-e184655
• Fully compatible with
RoHS/Pb-Free solder
alloys and higher
temperature profiles
associated with leadfree
assembly.
Applications
• Instrumentation
• Base Stations
• RoHS compliant and
Halogen Free
• Available in ratings of
0.062 ~ 10 Amperes.
Electrical Characteristics for Series
% of Ampere rating
100%
200%
Opening Time at 25ºc
4 hours Minimum
5 secs. Maximum
• Telecommunications
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
1.0
1.25
1.5
1.6
2.0
2.5
3.0
3.15
3.5
4.0
5.0
6.3
7
.0
8.0
10.0
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.
010.
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
125
interrupting
rating (A)
Fuse
Furnished
0451.062
0451.080
0451.100
0451.125
0453.160
0453.200
0453.250
0453.315
0453.375
0453.400
0453.500
0453.630
0453.750
0453.800
0453001.
04531.25
045301.5
045301.6
0453002.
045302.5
0453003.
04533.15
045303.5
0453004.
0453005.
045306.3
0453007
.
0453008.
0453010.
nominal cold
resistance
(Ohms)
5.5372
4.0500
3.1000
1.7059
1.2157
1.3971
1.0496
0.3881
0.4541
0.4233
0.3046
0.2022
0.1444
0.1355
0.0780
0.078
0.0634
0.0580
0.0373
0.0288
0.0229
0.0215
0.0203
0.0163
0.0127
0.0098
0.0092
0.0079
0.0058
nominal
melting
2
t (A
2
sec)
i
0.00019
0.00033
0.00138
0.00286
0.0048
0.00652
0.01126
0.0311
0.0442
0.0551
0.0824
0.1381
0.2143
0.2654
0.6029
0.664
0.853
1.060
0.530
1.029
1.650
1.920
2.469
3.152
5.566
9.17
10.32
20.23
26.46
Agency Approvals
PS
E
50A @ 125 VAC/VDC
300A @ 32 VDC
35A @ 125 VAC / 50A @125 VDC
300A @ 32VDC
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
1. Cold resistance measured at less than 10% of rated current at 23ºC.
2. I
2
t values stated for 8ms opening time.
3. Agency Approval Table Key: X=Approved or Certified, P=Pending and Blank=Not Approved
4. Have special electrical characteristic needs? Contact Littelfuse to learn more about application specific options.
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/20/14
Surface Mount Fuses
NANO
2®
> 157 Fuse and Holder Combination
Temperature Rerating Curve
Average Time Current Curves
62mA
80mA
100mA
125mA
160mA
200mA
250mA
315mA
375mA
400mA
500mA
630mA
750mA
800mA
1A
1.25A
1.5A
1.6A
2A
2.5A
3A
3.15A
3.5A
4A
5A
6.3A
7A
8A
10A
100
10
1
TIME IN SECONDS
0.1
Note:
1. Derating depicted in this curve is in addition to the standard derating of 25% for
continuous operation.
0.01
0.001
0.01
0.1
1
10
100
1000
10000
CURRENT IN AMPS
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
60 – 120 secs
5°C/second max.
5°C/second max.
217°C
60 – 90 seconds
260
+0/–5
°C
20 – 40 seconds
5°C/second max.
8 minutes max.
260°C
T
P
T
L
Temperature
t
P
Ramp-up
Critical Zone
T
L
to T
P
200°C
T
S(max)
T
S(min)
Preheat
t
L
Ramp-down
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
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/20/14
Surface Mount Fuses
NANO
2®
> 157 Fuse and Holder Combination
Product Characteristics
Body:
Ceramic
Cap:
For 0.062A ~ 0.125A – Au plated Brass
For 0.200A ~ 10A – Silver plated Brass
Clip Plating: Matte Tin
Body:
Brand Logo, Current Rating
Force applied at fuse center, perpendicular to
the long axis (@ 0.75 lbs. MIN)
MIL-STD-202, Method 208 / IPC/ EIA /
JEDEC J-STD002B, Test Condition A
MIL –STD-202, Method 103 @ 85ºC / 85%RH,
1000 hours
MIL-STD-202, Method 215 (3 solvent types)
Vibration
Moisture Resistance
Salt Spray/
Atmosphere
Shock
Operating
Temperature
Thermal Shock
-55ºC to 125ºC with proper derating
MIL
-STD-202, Method 107
,
Test Condition B
(5 cycles -65ºC to +125ºC)
MIL
-STD-202, Method 201
(10-55 Hz)
MIL
-STD-202, Method 106,
10 cycles
MIL
-STD-202, Method 101,
Test Condition B (48 hrs.),
5% NaCl in De-ionized Water
MIL
-STD-202, Method 213,
Test Condition I (100 G’s peak for 6
milliseconds)
Materials
Product
Marking
Clip Retention
Solderability
Humidity Test
Resistance to
Solvents
Dimensions
6.50 ± 0.20
[0.256]
6.10
[0.240]
Part Numbering System
0157 001. D R
2.69
[0.106]
SERIES
2.69
[0.106]
F
L
1A
3.7 ± 0.13
[0.146]
PACkINg OPTION
AMP CODE
R = Tape and Reel
1.45
[0.057]
quANTITy CODE
3.70
[0.146]
D = 1500 pcs
3.90 ± 0.13
[0.154]
3.40
[0.134]
2.50 ± 0.2
[0.098]
Packaging
packaging
Option
packaging
Specification
Surface Mount
Quantity
1500
Quantity &
packaging code
DR
"A"
0.10
"B"
7.26
[0.29]
Tape and Reel
Additional Information
2.46
[0.10]
3.00
[0.12]
Datasheet
2.40
[0.09]
Resources
Samples
PCB Recommendation for Thermal Management
1. Minimum Copper Layer Thickness = 100um
2. Minimum Copper Trace Width = 10mm
Note:
Alternate methods of thermal management may be used. In such cases, under normal
operations, the maximum temperature of the fuse body should not exceed 80ºC in a 25ºC
ambient environment.
© 2014 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: 02/20/14
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