Surface Mount Fuses
Subminiature Surface Mount
RoHS
NANO
2®
FUSE
Very Fast-Acting 451/453 Series
®
®
The Nano
2
SMF
Fuse is a very small, square surface mount fuse that is
also available in a surface mount holder.
• 451 Series
RoHS Compliant
version now available, use ordering suffix
‘L’ (see example on data sheet).
ELECTRICAL CHARACTERISTICS:
% of Ampere
Rating
100%
200%
Ampere
Rating
1/16 –15
1/16 –10
12–15
Opening
Time
4 hours,
Minimum
5 seconds,
Maximum
20 seconds,
Maximum
AGENCY APPROVALS:
Recognized under the Components Program
of Underwriters Laboratories and Certified by CSA. Approved by METI
from 1 through 5 amperes.
6.86
(.270")
3.15
(.124")
2.95
1.96 (.116")
(.077")
Recommended pad layout
1.45
(.057")
6.10
(.240")
F
2.69
(.106")
2.69
(.106")
AGENCY FILE NUMBERS:
UL E10480, CSA LR 29862.
INTERRUPTING RATINGS:
1/16 – 8A
50 amperes at 125 VAC/VDC
300 amperes at 32 VDC
10A
35 amperes at 125 VAC/50 amperes at 125 VDC
300 amperes at 32 VDC
12A – 15A 50 amperes at 65 VAC/VDC
300 amperes at 24 VDC
7A
ENVIRONMENTAL SPECIFICATIONS:
Operating Temperature:
–55°C to 125°C.
Shock:
MIL-STD-202, Method 213, Test Condition I
(100 G’s peak for 6 milliseconds).
Vibration:
MIL-STD-202, Method 201 (10–55 Hz).
Salt Spray:
MIL-STD-202, Method 101, Test Condition B.
Insulation Resistance (After Opening):
MIL-STD-202, Method
302, Test Condition A, (10,000 ohms minimum).
Resistance to Soldering Heat:
MIL-STD-202,
Method 210, Test Condition B (10 sec. at 260°C).
Thermal Shock:
MIL-STD-202, Method 107,
Test Condition B (–65 to 125°C).
Moisture Resistance:
MIL-STD-202, Method 106, High Humidity
(90-98 RH), Heat (65°C).
Tin-Lead
Silver
Nominal
Nominal
Plated
Plated
Ampere Voltage Resistance Melting I
2
t
Catalog # Catalog # Rating
Rating Cold Ohms
A
2
Sec.
–
R451.062
0.062
125
5.50
0.00019
–
R451.080
0.080
125
4.05
0.00033
–
R451.100
0.100
125
3.10
0.00138
–
R451.125
0.125
125
1.70
0.00286
R451.160
0453.160
0.160
125
1.80
0.00306
R451.200
0453.200
0.200
125
1.40
0.00652
R451.250
0453.250
0.250
125
1.05
0.01126
R451.315
0453.315
0.315
125
0.78
0.0231
R451.375
0453.375
0.375
125
0.610
0.0425
R451.400
0453.400
0.400
125
0.560
0.0484
R451.500
0453.500
0.500
125
0.420
0.0795
R451.630
0453.630
0.630
125
0.305
0.143
R451.750
0453.750
0.750
125
0.245
0.185
R451.800
0453.800
0.800
125
0.212
0.271
R451
001.
0453
001.
1.0
125
0.153
0.459
R451
1.25
0453
1.25
1.25
125
0.0780
0.664
R451
01.5
0453
01.5
1.5
125
0.0630
0.853
R451
01.6
0453
01.6
1.6
125
0.0580
1.060
R451
002.
0453
002.
2.0
125
0.0367
0.530
R451
02.5
0453
02.5
2.5
125
0.0286
1.029
R451
003.
0453
003.
3.0
125
0.0227
1.650
R451
3.15
0453
3.15
3.15
125
0.0215
1.920
R451
03.5
0453
03.5
3.5
125
0.0200
2.469
R451
004.
0453
004.
4
125
0.0160
3.152
R451
005.
0453
005.
5
125
0.0125
5.566
R451
06.3
0453
06.3
6.3
125
0.0096
9.17
R451
007.
0453
007.
7
125
0.0090
10.32
R451
008.
0453
008.
8
125
0.0077
20.23
R451
010.
0453
010.
10
125
0.0056
26.46
R451
012.
0453
012.
12
65
0.0049
47.97
R451
015.
0453
015.
15
65
0.0037
97.82
Average Time Current Curves
1/4A
3/8A
1/2A
3/4A
1A
1 1/2A
2A
2 1/2A
3A
3 1/2A
4A
5A
7A
8A
10A
12A
15A
1
10
100
CURRENT IN AMPERES
1/16A
100
10
TIME IN SECONDS
1
0.1
0.01
0.001
0.05 0.1
1/8A
1000
PHYSICAL SPECIFICATIONS:
Materials:
Body: Ceramic
Terminations: Tin-Lead Alloy
RoHS Compliant Terminations: Gold over Nickel Plated Caps(451)
Silver Plated Caps(453)
Soldering Parameters(see page
3
for typical soldering profile):
Wave Solder — 260°C, 10 seconds maximum
Reflow Solder — 260°C, 30 seconds maximum
Solderability:
MIL-STD-202, Method 208.
PACKAGING SPECIFICATIONS:
12mm Tape and Reel per
EIA-RS481-1 (IEC 286, part3); 1,000 pieces per reel, add packaging
suffix, MR; 5,000 per reel, add packaging suffix NR.
Options:
For RoHS Compliant 451 series add the letter ‘L’ to end of packaging
suffix. Example: R451001.MRL (RoHS Compliant 1A, 1,000 per reel).
Refer to pg. 374 for SMF Omni-Blok
®
Holder, Series
154
000.
374
PATENTED
w w w. l i t t e l f u s e . c o m
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Short Circuit/Current Overload
Part:
0451004.
Series:
451 Series - NANO
2®
Very Fast-Acting Subminiature Surface Mount Fuse
Technology::
Surface Mount (SMT)
PARAMETERS
Package Type
Mount Method
Pkg Type
Mount
Key
Subminiature Ceramic
Surface Mount
0
0
0
0
Fuse Block/ Clip / Holder
Very Fast-Acting
Y
Subminiature
4.0000
125
0.0160
3.1520
Peak Pulse Current - 10x1000µs I
PP
10x1000µs (A)
Peak Pulse Current - 10x160µs
Peak Pulse Current - 10x560µs
Peak Pulse Current - 2x10µs
I
PP
10x160µs (A)
I
PP
10x560µs (A)
Ipp
PP
2x10µs (A)
Mount2-NA
Fuse Opening Characteristic
Lead-Free
Package Size / Form Factor
Current Rating
Voltage Rating
Nominal Cold Resistance
Norminal Melting I
2
t
Certifications
Opening
Pb Free
Size
Amp Rating (A)
Voltage Rating (V)
Resistance (Ohms)
I
2
t (A
2
Sec)
Cert
Interrupt Ratings
IR
300A @ 32V
50A @ 125V
50A @ 125V
Check Distributor Stock
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Request a Sample
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Series Datasheets
451 and 453 Series Data Sheet
451_453.pdf (51 K)
Last Updated:
June 15, 2005
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