LITTELFUSE 448

Surface Mount Fuses
NANO2® > Very Fast-Acting > 448 Series
448 Series Fuse
PS
E
Description
The lead-free Nano2 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.
Agency Approvals
AGENCY
PS
E
t 8JEFPQFSBUJOH
temperature range
t 7FSZGBTUBDUJOH
t -PXUFNQFSBUVSF
de-rating
t 4NBMMTJ[F
AGENCY FILE NUMBER
AMPERE RANGE
E10480
62mA - 15A
LR29862
62mA - 15A
NBK030205
1A - 10A
t 8JEFSBOHFPGDVSSFOU
SBUJOHBWBJMBCMFN"
UP"
Applications
Electrical Characteristics for Series
% of Ampere
Rating
Ampere Rating
Opening Time
100%
1/16 –15
4 hours, Minimum
1/16 –10
5 sec., Maximum
12 –15
20 sec., Maximum
200%
t -FBEGSFFBOE)BMPHFO
Free
t /PUFCPPL1$
t 5FMFDPNTZTUFN
t -$%1%157
t 8JSFMFTTCBTFTUBUJPO
t -$%NPOJUPS
t 8IJUFHPPET
t -$%1%1QBOFM
t (BNFDPOTPMF
t -$%CBDLMJHIUJOWFSUFS
t 0GåDF"VUPNBUJPO
equipment
t 1PSUBCMF%7%QMBZFS
t 1PXFSTVQQMZ
t /FUXPSLJOH
t 1$TFSWFS
t $PPMJOHGBOTZTUFN
t 4UPSBHFTZTUFN
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/448.html for current information.
49
Revised: December 17, 2010
t #BUUFSZDIBSHJOHDJSDVJU
protection
t *OEVTUSJBMFRVJQNFOU
t .FEJDBMFRVJQNFOU
t"VUPNPUJWF
448 Series
448 Series
Features
Mount
Fuses
IntroductionSurface
to Circuit
Protection
NANO2® > Very Fast-ActingTransientology
> 448 Series
Electrical Specifications by Item
Ampere
Rating
(A)
Amp Code
0.062
.062
Max
Voltage
Rating
(V)
125
0.080
.080
125
Interrupting
Rating
Agency Approvals
Nominal Cold
Resistance
(Ohms)
Nominal
Melting
I2t (A2sec)
5.50
0.00023
x
x
4.42
0.00043
x
x
x
PS
E
0.100
.100
125
2.90
0.00082
x
0.125
.125
125
2.58
0.00130
x
x
0.160
.160
125
1.76
0.00280
x
x
0.200
.200
125
1.40
0.00380
x
x
0.250
.250
125
1.05
0.01520
x
x
0.315
.315
125
0.7900
0.02650
x
x
0.375
.375
125
0.7300
0.02400
x
x
0.400
.400
125
0.4895
0.04160
x
x
0.500
.500
125
0.3800
0.10000
x
x
0.630
.630
125
0.2821
0.121
x
x
0.750
.750
125
0.2475
0.206
x
x
0.800
.800
125
1.00
001.
125
1.25
1.25
125
50 amperes
!7"$7%$
300 amperes
!7%$
14&BNQFSFT
!7"$
0.1907
0.272
x
x
0.08630
0.441
x
x
x
0.06619
0.900
x
x
x
1.50
01.5
125
0.06514
0.900
x
x
x
1.60
01.6
125
0.06261
1.122
x
x
x
2.00
002.
125
0.03529
0.812
x
x
x
2.50
02.5
125
0.02934
1.156
x
x
x
3.00
003.
125
0.02445
1.720
x
x
x
3.15
3.15
125
0.02300
1.810
x
x
x
3.50
03.5
125
0.02100
2.300
x
x
x
4.00
004.
125
0.01577
3.970
x
x
x
5.00
005.
125
0.01531
4.490
x
x
x
6.30
06.3
125
0.01044
12.10
x
x
x
7.00
007.
125
0.00900
13.92
x
x
x
8.00
008.
125
0.00780
18.33
x
x
x
0.00700
28.00
x
x
x
0.00533
47.59
x
x
0.00394
96.10
x
x
35 amperes
!7"$
10.00
010.
125
50 amperes
!7%$
300 amperes
!7%$
14&BNQFSFT
!7"$
12.00
012.
65
15.00
015.
65
50 amperes
!7"$7%$
300 amperes
!7%$
Notes:
- l2t calculated at 8ms.
- Resistance is measured at 10% of rated current, 25ºC
448 Series
50
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/448.html for current information.
Surface Mount Fuses
NANO2® > Very Fast-Acting > 448 Series
Average Time Current Curves
.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
Temperature Rerating Curve
100
448 Series
TIME IN SECONDS
10
1
0.1
/PUF
%FSBUJOHEFQJDUFEJOUIJTDVSWFJTJOBEEJUJPOUPUIFTUBOEBSEEFSBUJOHPGGPS
continuous operation.
0.01
0.001
0.1
1
10
100
1000
CURRENT IN AMPS
Soldering Parameters
Pre Heat
1Co'SFFBTTFNCMZ
¡$
- Temperature Max (Ts(max))
¡$
- Time (Min to Max) (ts)
60 – 120 secs
¡$TFDPOENBY
TS(max) to TL - Ramp-up Rate
¡$TFDPOENBY
- Temperature (TL) (Liquidus)
¡$
- Temperature (tL)
60 – 90 seconds
250
Time within 5°C of actual peak
Temperature (tp)
20 – 40 seconds
Ramp-down Rate
¡$TFDPOENBY
Time 25°C to peak Temperature (TP)
8 minutes max.
Do not exceed
¡$
Wave Soldering Parameters
¡$1FBL
Temperature, 10
seconds max.
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/448.html for current information.
TL
TS(max)
tL
Ramp-down
TS(min)
Preheat
tS
25
Peak Temperature (TP)
+0/-5
Critical Zone
TL to TP
Ramp-up
- Temperature Min (Ts(min))
Average ramp up rate (Liquidus Temp
(TL) to peak
Reflow
tP
TP
Temperature
Reflow Condition
time to peak temperature
(t 25ºC to peak)
Time
¡$
51
448 Series
Mount
Fuses
IntroductionSurface
to Circuit
Protection
NANO2® > Very Fast-ActingTransientology
> 448 Series
Product Characteristics
Materials
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5FSNJOBUJPOT(PMEQMBUFE$BQT
Product Marking
#SBOE"NQFSBHF3BUJOH
Operating
Temperature
Moisture Sensitivity
Level
Thermal Shock
Mechanical Shock
-55o$UPo$
-FWFM+45%$
Vibration
Solderability
.*-45%.FUIPE
Insulation
Resistance (after
Opening)
.*-45%.FUIPE5FTU$POEJUJPO
"PINTNJOJNVN
Moisture Resistance
.*-45%.FUIPEDZDMFT
Salt Spray
.*-45%.FUIPE5FTU
$POEJUJPO#IST
.*-45%.FUIPE5FTU
DPOEJUJPO#TFDBUo$
Resistance to Soldering
Heat
Dimensions
6.10
(.240")
F
7A
.*-45%.FUIPE5FTU
$POEJUJPO#DZDMFTo$UP
125o$NJOVUFT!FBDIFYUSFNF
.*-45%.FUIPE5FTU*
%FFOFSHJ[FE(TQLBNQMJUVEF
sawtooth wave 6ms duration, 3
DZDMFT9:;YZ[TIPDLT
.*-45%.FUIPEw
BNQMJUVEF)[JONJOIST
FBDI9:;IST
Part Numbering System
2.69
(.106")
0448 001. M R
2.69
(.106")
SERIES
AMP Code*
Refer to Electrical
Characteristics table
1.45
(.057")
6.86
(.270")
QUANTITY Code
3.15
(.124")
PACKAGING Code
M = 1000 pcs
R = Tape and Reel
*Example:
1.5 amp product is 044801.5MR
BNQQSPEVDUTIPXOBCPWF
2.95
1.96 (.116")
(.077")
Recommended pad layout
Packaging
Packaging Option
Packaging Specification
Quantity
Quantity &
Packaging Code
12mm Tape and Reel
&*"34*&$QBSU
1000
MR
448 Series
52
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/448.html for current information.