Surface Mount Fuses
NANO
2®
> Very Fast-Acting > 448 Series
448 Series Fuse
Description
PS
E
The lead-free Nano
2
SMF Fuse is a very small, square
surface mount fuse that 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.
Features
• Lead-free and Halogen
Free
• Very fast acting
Agency Approvals
Agency
Agency File numbeR
e10480
lR29862
PS
E
• Wide operating
temperature range
• Low temperature
de-rating
• Small size
AmpeRe RAnge
62mA - 15A
62mA - 15A
1A - 10A
• Wide range of current
rating available (62mA to
15A)
Applications
• Notebook PC
• LCD/PDP TV
• LCD monitor
• Telecom system
• Wireless basestation
• White goods
• Game console
• Office Automation
equipment
• Battery charging circuit
protection
• Industrial equipment
• Medical equipment
• Automotive
nbK030205
Electrical Characteristics for Series
% of Ampere
Rating
100%
200%
Ampere Rating
1/16 –15
1/16 –10
12 –15
Opening Time
4 hours, Minimum
5 sec., Maximum
20 sec., Maximum
• LCD/PDP panel
• LCD backlight inverter
• Portable DVD player
• Power supply
• Networking
• PC server
• Cooling fan system
• Storage system
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: May 2, 2013 12:03 PM
Surface Mount Fuses
NANO
2®
> Very Fast-Acting > 448 Series
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
1.00
1.25
1.50
1.60
2.00
2.50
3.00
3.15
3.50
4.00
5.00
6.30
7
.00
8.00
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
35 amperes
@125 VAC
10.00
010.
125
50 amperes
@125 VDC
300 amperes
@32 VDC
PSE: 100 amperes
@100VAC
12.00
012.
85
50 amperes
@65 VAC/VDC
300 amperes
@24 VDC
200 amperes
@85 VDC
Notes:
- l
2
t calculated at 8ms.
- Resistance is measured at 10% of rated current, 25ºC
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.
interrupting
Rating
nominal cold
Resistance
(Ohms)
5.50
4.42
2.90
2.58
1.76
1.40
1.05
0.7900
0.7300
0.4895
0.3800
0.2821
0.2475
0.1907
0.08630
0.06619
0.06514
0.06261
0.03529
0.02934
0.02445
0.02300
0.02100
0.01577
0.01531
0.01044
0.00900
0.00780
nominal
melting
i
2
t (A
2
sec)
0.00023
0.00043
0.00082
0.00130
0.00280
0.00380
0.01520
0.02650
0.02400
0.04160
0.10000
0.121
0.206
0.272
0.441
0.900
0.900
1.122
0.812
1.156
1.720
1.810
2.300
3.970
4.490
12.10
13.92
18.33
Agency Approvals
PS
E
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x
50 amperes
@125 VAC/VDC
300 amperes
@32 VDC
PSE: 100 amperes
@100VAC
0.00700
28.00
x
x
x
0.00533
47
.59
x
x
15.00
015.
85
0.00394
96.10
x
x
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: May 2, 2013 12:03 PM
Surface Mount Fuses
NANO
2®
> Very Fast-Acting > 448 Series
Temperature Rerating Curve
448 SERIES NANO LEAD FREE
Average Time Current Curves
VERY FAST ACTING FUSE
TIME IN SECONDS
Note:
1. Derating depicted in this curve is in addition to the standard derating of 25% for
continuous operation.
0.01
0.001
0.1
1
10
100
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
60 – 120 secs
5°C/second max.
5°C/second max.
217°C
60 – 90 seconds
260
+0/–5
.062 A
.080 A
.100 A
.125 A
.160 A
.200 A
.250 A
.315 A
.375 A
.40 A
.50 A
.63 A
.75 A
.80 A
1.00 A
1.25 A
1.50 A
1.60 A
2.00 A
2.50 A
3.00 A
3.15 A
3.50 A
4.00 A
5.00 A
6.30 A
7A
8A
10 A
12 A
15 A
100
10
1
0.1
CURRENT IN AMPS
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
°C
20 – 40 seconds
5°C/second max.
8 minutes max.
260°C
260°C Peak
Temperature, 10
seconds max.
Wave Soldering parameters
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: May 2, 2013 12:03 PM
Surface Mount Fuses
NANO
2®
> Very Fast-Acting > 448 Series
Product Characteristics
Materials
Product Marking
Operating
Temperature
Moisture Sensitivity
Level
Solderability
Insulation
Resistance (after
Opening)
Body: Ceramic
Terminations: Gold-plated Caps
Brand, Amperage Rating
-55
o
C to 125
o
C
Level 1, J-STD-020C
Vibration
MIL-STD-202, Method 208
MIL-STD-202, Method 302, Test Condition
A (10,000 ohms minimum)
Moisture Resistance
Salt Spray
Resistance to Soldering
Heat
Mechanical Shock
Thermal Shock
MIL
-STD-202, Method 107 Test
,
Condition B, 5 cycles, -65
o
C to
125
o
C, 15 minutes @ each extreme
MIL
-STD-202, Method 213, Test I:
Deenergized. 100G’s 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
o
C)
Dimensions
6.10 ± .20
(.240")
2.69 ± .25
(.106")
2.69 ± .25
(.106")
Part Numbering System
0448 001. M R
SERIES
AMP Code
*
Refer to electrical
characteristics table
m = 1000 pcs
7A
1.45
(.057")
F
6.86
(.270")
3.15
(.124")
2.95
(.116")
QuANTITy Code
PACkAgINg Code
R = Tape and Reel
*Example:
1.5 amp product is 044801.5MR
(1 amp product shown above).
1.96
(.077")
Recommended pad layout
Packaging
packaging Option
12mm Tape and Reel
packaging Specification
EIA RS-481-1 (IEC 286, part 3)
Quantity
1000
Quantity &
packaging code
MR
© 2013 Littelfuse, Inc.
Specifications are subject to change without notice.
Revised: May 2, 2013 12:03 PM
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