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SURFACE MOUNT FUSES
SUBMINIATURE SURFACE MOUNT
NANO2® SMF Very Fast-Acting Type Fuse
The Nano2SMF Fuse is a very small, square surface mount
fuse that is also available in a surface mount holder.
ELECTRICAL CHARACTERISTICS:
% of Ampere Ampere Opening
Rating Rating Time
100% 1/16–15 4 hours, Minimum
200% 1/16–10 5 seconds, Maximum
12 –15 20 seconds, Maximum
AGENCY APPROVALS: Recognized under the Components
Program of Underwriters Laboratories and Cer tified 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 T emperature: – 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, par t 3); 1,000 per reel, add
packaging suffix, MR.
PATENTED
ORDERING INFORMATION:
100
10
1
0.1
0.01
0.001
1/16A
1/8A
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
0.05 0.1 1 10 100 1000
TIME IN SECONDS
CURRENT IN AMPERES
Refer to pg. 102 for SMF Omni-Blok
®
Holder, Ser ies 154 000.
®
®
Average Time Current Curves
L
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")
Note: Metric dimensions shown.
Inch dimensions are in parentheses.
Recommended pad layout
Tin-Lead Silver Nominal Nominal
Plated Plated Ampere Voltage Resistance Melting I2t
Catalog # Catalog # Rating Rating Cold Ohms A2Sec.
–R451.062 1/16 125 5.50 0.00019
–R451.125 1/8 125 1.70 0.00286
R451.250 0453.250 1/4 125 1.05 0.01126
R451.375 0453.375 3/8 125 0.610 0.0425
R451.500 0453.500 1/2 125 0.420 0.0795
R451.750 0453.750 3/4 125 0.245 0.185
R451 001. 0453 001. 1 125 0.153 0.459
R451 01.5 0453 01.5 11/2125 0.0630 0.853
R451 002. 0453 002. 2 125 0.0367 0.53
R451 02.5 0453 02.5 21/2125 0.0286 1.029
R451 003. 0453 003. 3 125 0.0227 1.65
R451 03.5 0453 03.5 31/2125 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 007. 0453 007. 7 125 0.0090 10.32
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
