374
Surface Mount Fuses
www.littelfuse.com
Subminiature Surface Mount
Lead-Free NANO2® Fuse Very Fast-Acting 448 Series
The lead free Nano2SMF Fuse is a very small, square surface mount fuse
that is RoHS compliant and 100% Lead-Free.This product is fully compatible
with lead-free solder alloys and higher temperature profiles associated with
lead-free assembly.
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 METI 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 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).
ORDERING INFORMATION:
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
Nominal Nominal
Ampere Voltage Resistance Melting I2t
Catalog # Rating Rating Cold Ohms A2Sec.
0448.062 0.062 125 5.50 0.00023
0448.080 0.080 125 4.42 0.00043
0448.100 0.100 125 2.90 0.00082
0448.125 0.125 125 2.58 0.00130
0448.160 0.160 125 1.76 0.00280
0448.200 0.200 125 1.40 0.00380
0448.250 0.250 125 1.05 0.01520
0448.315 0.315 125 0.7900 0.0265
0448.375 0.375 125 0.7300 0.0240
0448.400 0.400 125 0.4895 0.0416
0448.500 0.500 125 0.3800 0.1000
0448.630 0.630 125 0.2821 0.121
0448.750 0.750 125 0.2475 0.206
0448.800 0.800 125 0.1907 0.272
0448 001. 1.0 125 0.08630 0.441
0448 1.25 1.25 125 0.06619 0.900
0448 01.5 1.5 125 0.06514 0.900
0448 01.6 1.6 125 0.06261 1.122
0448 002. 2.0 125 0.03529 0.812
0448 02.5 2.5 125 0.02934 1.156
0448 003. 3.0 125 0.02445 1.720
0448 3.15 3.15 125 0.02300 1.810
0448 03.5 3.5 125 0.02100 2.300
0448 004. 4 125 0.01577 3.970
0448 005. 5 125 0.01531 4.490
0448 06.3 6.3 125 0.01044 12.10
0448 007. 7 125 0.00900 13.92
0448 008. 8 125 0.00780 18.33
0448 010. 10 125 0.00700 28.00
0448 012. 12 65 0.00533 47.59
0448 015. 15 65 0.00394 96.10
®
®
RoHS
PHYSICAL SPECIFICATIONS:
Materials:
Body: Ceramic, blue ink used for device mar king
Ter minations: Gold over nickel plated brass caps
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, par t3); 1,000 pieces per reel, add packaging
suffix, MR; 5,000 per reel, add packaging suffix NR.
PATENTED
Pb
0.001
0.01
0.1
1
10
100
00010010111.0
CURRENT IN AMPS
TIME IN SECONDS
8A
7A
6.3A
5A
4A
3
.
15A
2.5A
2A
.
A
1
.
5A
1
.
25A
1A
.
750A
.
800
.
630
.500A
.
400
.375A
.
315A
.250A
.
200A
.
160
.
12
5A
.
100
.080
.
062
15A
12A
10
A
3
.
5A
3
Average Time Current Curves