57
© 2009 Littelfuse, Inc.
Specications are subject to change without notice.
Surface Mount Fuses
451/453 Series
NANO2® > Very Fast-Acting > 451/453 Series
451/453 Series
Please refer to www.littelfuse.com/series/451.html
or /453.html for current information.
451/453 Series Fuse
Description
The Nano2 SMF Fuse is a very small, Wire-in-Air (WIA)
square shape surface mount fuse which is very suitable
for the secondary side circuit over-current protection
applications and is designed for PCB using surface mount
technology.
Agency Approvals
AGENCY AGENCY FILE NUMBER AMPERE RANGE
E10480 6.3A - 15A
LR29862 62mA - 15A
PS
E
NBK030205-E10480B
NBK101105-E184655
1A - 5A
6.3A - 10A
E10480 62mA - 5A
Electrical Characteristics for Series
Features
t 7FSZGBTUBDUJOH
t 4NBMMTJ[F
t 8JEFSBOHFPGDVSSFOU
rating available (62mA
to 15A)
t 8JEFPQFSBUJOH
temperature range
t -PXUFNQFSBUVSF
de-rating
t 3P)4DPNQMJBOU
t )BMPHFO'SFF
% of Ampere
Rating Ampere Rating Opening Time
100% 1/16 –15 4 hours, Minimum
200%
1/16 –10 5 sec., Maximum
12 –15 20 sec., Maximum
PS
E
Applications
t /PUFCPPL1$
t -$%1%157
t -$%NPOJUPS
t -$%1%1QBOFM
t -$%CBDLMJHIUJOWFSUFS
t 1PSUBCMF%7%QMBZFS
t 1PXFSTVQQMZ
t /FUXPSLJOH
t 1$TFSWFS
t $PPMJOHGBOTZTUFN
t 4UPSBHFTZTUFN
t 5FMFDPNTZTUFN
t 8JSFMFTTCBTFTUBUJPO
t 8IJUFHPPET
t (BNFDPOTPMF
t 0GåDF"VUPNBUJPO
equipment
t #BUUFSZDIBSHJOHDJSDVJU
protection
t *OEVTUSJBMFRVJQNFOU
t .FEJDBMFRVJQNFOU
t "VUPNPUJWF
Revised: July 13, 2010
Introduction to Circuit Protection
Introduction to Circuit Protection
Transientology
58 © 2009 Littelfuse, Inc.
Specications are subject to change without notice.
Surface Mount Fuses
451/453 Series
NANO2® > Very Fast-Acting > 451/453 Series
Please refer to www.littelfuse.com/series/451.html
or /453.html for current information.
Electrical Specications by Item
Ampere
Rating
(A)
Amp
Code
Max
Voltage
Rating
(V)
Interrupting
Rating
Nominal Cold
Resistance
(Ohms)
Nominal
Melting
I2t (A2sec)
Agency Approvals
PS
E
0.062 .062 125
BNQFSFT!7"$7%$
BNQFSFT!7%$
PSE: 100 amperes
!7"$
5.5000 0.00019 x x
0.080 .080 125 4.0500 0.00033 x x
0.100 .100 125 3.1000 0.00138 x x
0.125 .125 125 1.7000 0.00286 x x
0.160 .160 125 1.2157 0.0048 x x
0.200 .200 125 0.8372 0.0089 x x
0.250 .250 125 0.5765 0.0158 x x
0.315 .315 125 0.3918 0.0311 x x
0.375 .375 125 0.6100 0.0425 x x
0.400 .400 125 0.5600 0.0484 x x
0.500 .500 125 0.4200 0.0795 x x
0.630 .630 125 0.3050 0.143 x x
0.750 .750 125 0.2450 0.185 x x
0.800 .800 125 0.2120 0.271 x x
1.00 001. 125 0.1530 0.459 x x x
1.25 1.25 125 0.0780 0.664 x x x
1.50 01.5 125 0.0630 0.853 x x x
1.60 01.6 125 0.0580 1.060 x x x
2.00 002. 125 0.0367 0.530 x x x
2.50 02.5 125 0.0286 1.029 x x x
3.00 003. 125 0.0227 1.650 x x x
3.15 3.15 125 0.0215 1.920 x x x
3.50 03.5 125 0.0200 2.469 x x x
4.00 004. 125 0.0160 3.152 x x x
5.00 005. 125 0.0125 5.566 x x x
6.30 06.3 125 0.0096 9.170 x x x
7.00 007. 125 0.0090 10.32 x x x
8.00 008. 125 0.0077 20.23 x x x
10.0 010. 125
BNQFSFT!7"$
BNQFSFT!7%$
BNQFSFT!7%$
PSE: 100 amperes
!7"$
0.0056 26.46 x x x
12.0 012. 65 BNQFSFT!7"$7%$
BNQFSFT!7%$
0.0049 47.97 x x
15.0 015. 65 0.0037 97.82 x x
Notes:
- l2t calculated at 8ms.
- Resistance is measured at 10% of rated current, 25ºC
59
© 2009 Littelfuse, Inc.
Specications are subject to change without notice.
Surface Mount Fuses
451/453 Series
NANO2® > Very Fast-Acting > 451/453 Series
451/453 Series
Please refer to www.littelfuse.com/series/451.html
or /453.html for current information.
Average Time Current Curves
Reow Condition Pb – Free assembly
Pre Heat
- Temperature Min (Ts(min))150°C
- Temperature Max (Ts(max))200°C
- Time (Min to Max) (ts)60 – 120 secs
Average ramp up rate (Liquidus Temp
(TL) to peak 5°C/second max.
TS(max) to TL - Ramp-up Rate 5°C/second max.
Reow - Temperature (TL) (Liquidus) 217°C
- Temperature (tL)60 – 90 seconds
Peak Temperature (TP)250+0/-5 °C
Time within 5°C of actual peak
Temperature (tp)20 – 40 seconds
Ramp-down Rate 5°C/second max.
Time 25°C to peak Temperature (TP)8 minutes max.
Do not exceed 260°C
Soldering Parameters
Temperature Rerating Curve
100
10
1
0.1
0.01
0.001
.062A
.125A
.250A
.375A
.500A
.750A
1A
1.5A
2A
2.5A
3A
3.5A
4A
5A
7A
10A
12A
15A
0.05 0.1 1 10 100 1000
TIME IN SECONDS
CURRENT IN AMPERES
8A
.160A
.200A
.315A
Note:
 %FSBUJOHEFQJDUFEJOUIJTDVSWFJTJOBEEJUJPOUPUIFTUBOEBSEEFSBUJOHPGGPS
continuous operation.
Wave Soldering Parameters
¡$1FBL
Temperature,
10 seconds max.
Time
Temperature
TP
TL
TS(max)
TS(min)
25
tP
tL
tS
time to peak temperature
(t 25ºC to peak)
Ramp-down
Ramp-up
Preheat
Critical Zone
TL to TP
Introduction to Circuit Protection
Introduction to Circuit Protection
Transientology
60 © 2009 Littelfuse, Inc.
Specications are subject to change without notice.
Surface Mount Fuses
451/453 Series
NANO2® > Very Fast-Acting > 451/453 Series
Please refer to www.littelfuse.com/series/451.html
or /453.html for current information.
Materials
Body: Ceramic
Terminations:
(PME1MBUFE$BQTGPS3P)4)'TFSJFT
4O1C1MBUFE$BQTGPS/PO3P)4TFSJFT
4JMWFSQMBUFE$BQTGPS3P)4CFMPX
N"3BUJOH4FSJFT
Product Marking #SBOE"NQFSF3BUJOH
Operating
Temperature -55°C to 125°C
Moisture Sensitivity
Level -FWFM+45%$
Solderability .*-45%.FUIPE
Insulation
Resistance
(after Opening)
.*-45%.FUIPE5FTU$POEJUJPO
A (10,000 ohms minimum)
Thermal Shock
.*-45%.FUIPE5FTU
Condition B, 5 cycles, -65°C /
+125°C, 15 minutes @ each extreme
Mechanical Shock
.*-45%.FUIPE5FTU*
%FFOFSHJ[FE(TQLBNQMJUVEF
sawtooth wave 6ms duration, 3
DZDMFT9:;YZ[TIPDLT
Vibration
.*-45%.FUIPEw
BNQMJUVEF)[JONJOIST
FBDI9:;IST
Moisture Resistance .*-45%.FUIPEDZDMFT
Salt Spray .*-45%.FUIPE5FTU
Condition B (48hrs)
Resistance to Soldering
Heat
.*-45%.FUIPE5FTU
condition B (10 sec at 260°C)
Product Characteristics
Dimensions
Packaging
Part Numbering System
F
7 A
6.86
(.270")
3.15
(.124")
2.95
(.116")
1.96
(.077")
2.69
(.106")
2.69
(.106")
1.45
(.057")
6.10
(.240")
Recommended pad layout
Packaging Option Packaging Specication Quantity Quantity &
Packaging Code
NN5BQFBOE3FFM &*"34*&$QBSU 5000 /3
NN5BQFBOE3FFM &*"34*&$QBSU 1000 .3
0451 001. M R L
SERIES
AMP Code
QUANTITY Code
PACKAGING Code
3FGFSUP&MFDUSJDBM
characteristics table
.QDT
/ QDT
35BQFBOE3FFM
RoHS Compliant & Halogen Free
(PME4O1C4JMWFS1MBUFE$BQT
4JMWFS1MBUFE$BQT
NOTE: “L” sufx applies to 451 series only
 TFSJFTNBZCFPSEFSFEBTFJUIFSi3P)4BOE)'wi-wTVGåYPSOPO3P)4OPTVGåYWFSTJPO
 TFSJFTJTBWBJMBCMFPOMZBT3P)4DPNQMJBOUWFSTJPOBOEEPFTOPUSFRVJSFi-wTVGåY1MFBTFEPOPU
JODMVEFi-wTVGåYXJUIJOTFSJFTPSEFSJOHJOTUSVDUJPOT
TFSJFTJTPOMZBWBJMBCMFGSPNN"VQUPUIFIJHIFTUSBUJOHTQFDJåFE'PSSBUJOHTCFMPXN"
please use 451 series for ordering.