Surface Mount Fuses
57
© 2009 Littelfuse, Inc.
Specifications are subject to change without notice.
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
• Veryfastacting
• Smallsize
• Widerangeofcurrent
rating available (62mA
to 15A)
• Wideoperating
temperature range
• Lowtemperature
de-rating
• RoHScompliant
• HalogenFree
% 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
• NotebookPC
• LCD/PDPTV
• LCDmonitor
• LCD/PDPpanel
• LCDbacklightinverter
• PortableDVDplayer
• Powersupply
• Networking
• PCserver
• Coolingfansystem
• Storagesystem
• Telecomsystem
• Wirelessbasestation
• Whitegoods
• Gameconsole
• OfceAutomation
equipment
• Batterychargingcircuit
protection
• Industrialequipment
• Medicalequipment
• Automotive
Revised: January 10, 2012
Introduction to Circuit Protection
Introduction to Circuit Protection
Transientology
58 © 2009 Littelfuse, Inc.
Specifications 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 Specifications 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
50amperes@125VAC/VDC
300amperes@32VDC
PSE: 100 amperes
@100VAC
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
35amperes@125VAC/
50amperes@125VDC
300amperes@32VDC
PSE: 100 amperes
@100VAC
0.0056 26.46 x x x
12.0 012. 65 50amperes@65VAC/VDC
300amperes@24VDC
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.
Specifications 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
Reflow 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.
Reflow - 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
1000.000
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 110100 1000
TIME IN SECONDS
CURRENT IN AMPERES
8A
.160A
.200A
.315A
Note:
1.Deratingdepictedinthiscurveisinadditiontothestandardderatingof25%for
continuous operation.
Wave Soldering Parameters
260°CPeak
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.
Specifications 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:
Gold-PlatedCaps(for451RoHS/HFseries)
SnPbPlatedCaps(for451Non-RoHSseries)
Silver-platedCaps(for451RoHSbelow
160mARating&453Series)
Product Marking Brand,AmpereRating
Operating
Temperature -55°C to 125°C
Moisture Sensitivity
Level Level1,J-STD-020C
Solderability MIL-STD-202,Method208
Insulation
Resistance
(after Opening)
MIL-STD-202,Method302,Test
Condition A (10,000 ohms minimum)
Thermal Shock
MIL-STD-202,Method107,Test
Condition B, 5 cycles, -65°C /
+125°C, 15 minutes @ each
extreme
Mechanical Shock
MIL-STD-202,Method213,TestI:
Deenergized.100G’spkamplitude,
sawtooth wave 6ms duration, 3
cyclesXYZ+xyz=18shocks
Vibration
MIL-STD-202,Method201:0.03”
amplitude,10-55Hzin1min.2hrs
eachXYZ=6hrs
Moisture Resistance MIL-STD-202,Method106,10
cycles
Salt Spray MIL-STD-202,Method101,Test
Condition B (48hrs)
Resistance to Soldering
Heat
MIL-STD-202,Method210,Test
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 ± .25
(.106")
2.69 ± .25
(.106")
1.45
(.057")
6.10 ± .20
(.240")
Recommended pad layout
Packaging Option Packaging Specification Quantity Quantity &
Packaging Code
12mmTapeandReel EIARS-481-2(IEC286,part3) 5000 NR
12mmTapeandReel EIARS-481-2(IEC286,part3) 1000 MR
0451 001. M R L
SERIES
AMP Code
QUANTITY Code
PACKAGING Code
RefertoElectrical
characteristics table
M=1000pcs
N =5000pcs
R=TapeandReel
RoHS Compliant & Halogen Free
451=Gold/SnPb/SilverPlatedCaps
453=SilverPlatedCaps
NOTE: “L” suffix applies to 451 series only
- 451seriesmaybeorderedaseither“RoHSandHF”(“L”sufx)ornon-RoHS(nosufx)version.
- 453seriesisavailableonlyasRoHScompliantversionanddoesnotrequire“L”sufx.Pleasedonot
include“L”sufxwithin453seriesorderinginstructions.