SURFACE MOUNT FUSES
SUBMINIATURE SURFACE MOUNT
NANO
2®
SMF
Very Fast-Acting Type Fuse
The Nano
2
SMF
Fuse is a very small, square surface mount
fuse that is also available in a surface mount holder.
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 MITI from 1 through 5 amperes.
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
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 F (20 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).
PHYSICAL SPECIFICATIONS:
Materials:
Body: Ceramic
Terminations: Tin-Lead Alloy or Silver
Plated Brass Caps.
Soldering Parameters:
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 (IEC 286, part 3); 1,000 per reel, add
packaging suffix, MR.
PATENTED
ORDERING INFORMATION:
Tin-Lead
Plated
Catalog #
–
–
R451.250
R451.375
R451.500
R451.750
R451
001.
R451
01.5
R451
002.
R451
02.5
R451
003.
R451
03.5
R451
004.
R451
005.
R451
007.
R451
010.
R451
012.
R451
015.
Silver
Nominal
Nominal
Plated Ampere Voltage Resistance Melting I
2
t
Catalog # Rating Rating Cold Ohms
A
2
Sec.
R451.062
1/16
125
5.50
0.00019
R451.125
1/8
125
1.70
0.00286
0453.250
1/4
125
1.05
0.01126
0453.375
3/8
125
0.610
0.0425
0453.500
1/2
125
0.420
0.0795
0453.750
3/4
125
0.245
0.185
0453
001.
1
125
0.153
0.459
125
0.0630
0.853
0453
01.5
1
1
/
2
0453
002.
2
125
0.0367
0.53
0453
02.5
2
1
/
2
125
0.0286
1.029
0453
003.
3
125
0.0227
1.65
0453
03.5
3
1
/
2
125
0.0200
2.469
0453
004.
4
125
0.0160
3.152
0453
005.
5
125
0.0125
5.566
0453
007.
7
125
0.0090
10.32
0453
010.
10
125
0.0056
26.46
0453
012.
12
65
0.0049
47.97
0453
015.
15
65
0.0037
97.82
6.86
(.270")
3.15
(.124")
2.95
1.96 (.116")
(.077")
Recommended pad layout
1.45
(.057")
6.10
(.240")
F
L
7A
2.69
(.106")
2.69
(.106")
Note: Metric dimensions shown.
Inch dimensions are in parentheses.
Average Time Current Curves
100
10
TIME IN SECONDS
1
0.1
0.01
0.001
0.05 0.1
1/4A
3/8A
1/2A
3/4A
1A
1 1/2A
2A
2 1/2A
3A
3 1/2A
4A
5A
7A
10A
12A
15A
1
10
100
CURRENT IN AMPERES
1/16A
1/8A
1000
Refer to pg. 102 for SMF Omni-Blok
®
Holder, Series
154
000.
34
ETC [ ETC ]
