SURFACE MOUNT FUSES
SUBMINIATURE SURFACE MOUNT
NANO2® SMF Slo-Blo® Type Fuse
®
®
The very small NANO2 Fuse with time delay performance
characteristics. The unique time delay feature of this fuse
design helps solve the problem of nuisance “opening” by
accommodating inrush currents that normally cause a fast-
acting fuse to open.
ELECTRICAL CHARACTERISTICS:
% of Ampere
Rating
Opening
Time
100%
200%
4 hours, Minimum
1 second, Min.; 60 seconds, Max.
300%
800%
0.2 seconds, Min.; 3 seconds, Max.
0.02 seconds, Min.; 0.1 seconds, Max.
6.86
(.270")
6.10
(.240")
AGENCY APPROVALS: Recognized under the
Components Program of Underwriters Laboratories and
Certified by CSA.
AGENCY FILE NUMBERS: UL E10480, CSA LR 29862.
INTERRUPTING RATINGS:
50 amperes at 125 VAC
50 amperes at 125 VDC
3.15
(.124")
F
T
L
1 A
1.45
(.057")
2.95
(.116")
1.96
(.077")
2.69
(.106")
300 amperes at 32 VDC
Recommended pad layout
2.69
(.106")
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).
Note: Metric dimensions shown.
Inch dimensions are in parentheses.
Vibration: MIL-STD-202, Method 201 (10–55 Hz, .06 in.
total excursion).
Salt Spray: MIL-STD-202, Method 101, Test Condition B
(48 hrs.).
Average Time Current Curves
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, (3 sec. at 260°C).
1000
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:
100
10
Materials: Body: Ceramic
Terminations: Tin-Lead Alloy or Silver
Plated Brass Caps.
Soldering Parameters:
Wave Solder — 260°C, 3 seconds maximum
Reflow Solder — 230°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.
Marking: The 452/454 series Slo-Blo fuse marking includes
the letter “T” to designate time delay characteristics.
PATENTED
1
ORDERING INFORMATION:
Tin-Lead
Plated
Silver
Nominal
Nominal
Plated Ampere Voltage Resistance Melting I2t
0.1
Catalog # Catalog # Rating
Rating Cold Ohms
A2 Sec.
R452.375 0454.375
R452.500 0454.500
R452.750 0454.750
3/8
1/2
3/4
125
125
125
1.60
0.940
0.460
0.101
0.240
0.904
R452 001. 0454 001.
R452 01.5 0454 01.5
R452 002. 0454 002.
R452 02.5 0454 02.5
1
125
125
125
125
0.270
0.116
0.0760
0.0540
1.98
3.65
8.20
15.0
1
0.01
2
1 /
0.1
1
10
CURRENT IN AMPERES
100
1000
2
1
2
2 /
R452 003. 0454 003.
R452 03.5 0454 03.5
3
125
125
0.0414
0.0224
20.16
26.53
1
2
3 /
R452 004. 0454 004.
R452 005. 0454 005.
4
5
125
125
0.0186
0.0136
34.40
53.72
Refer to pg. 102 for SMF Omni-Blok® Holder, Series 154 000T.
35