452 Datasheet, PDF (1/1 Pages) Littelfuse – NANO2 SIO-BIO Fuse 452/454 Series

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Surface Mount Fuses
Subminiature Surface Mount
NANO2®
Slo-Blo^® Fuse 452/454 Series
The NANO² Slo-Blo fuse has enhanced inrush withstand characteristics
over the NANO² Fast-Acting fuse. The unique time delay feature of this
fuse design helps solve the problem of nuisance “opening” by accommo-
dating inrush currents that normally cause a fast-acting fuse to open.
ELECTRICAL CHARACTERISTICS:
% of Ampere
Rating
Opening
Time
100%
4 hours, Minimum
200%
1 second, Min.; 60 seconds, Max.
300%
800%
0.2 seconds, Min.; 3 seconds, Max.
0.02 seconds, Min.; 0.1 seconds, Max.
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/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, .06 in. total excursion).
Salt Spray: MIL-STD-202, Method 101, Test Condition B (48 hrs.).
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).
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, 3 seconds maximum
Reflow Solder — 230°C, 30 seconds maximum
Solderability: MIL-STD-202, Method 208.
PACKAGING SPECIFICATIONS: 12mm Tape and Reel per EIA-
RS481-1 (IEC 286, part 3); 1,000 per reel; 5,000 piece reel also available.
Marking: The 452/454 series Slo-Blo fuse marking includes the letter
“T” to designate time delay characteristics.
PATENTED
ORDERING INFORMATION:
6.86
(.270")
3.15
(.124")
2.95
1.96 ^(.116")
(.077")
Recommended pad layout
Average Time Current Curves
1000
100
10
1
®
®
6.10
(.240")
F_T
1A
1.45
(.057")
2.69
(.106")
2.69
(.106")
7
Tin-Lead
Plated
Catalog #
R452.375
R452.500
R452.750
R452 001.
R452 01.5
R452 002.
R452 02.5
R452 003.
R452 03.5
R452 004.
R452 005.
Silver
Plated Ampere
Catalog # Rating
0454.375 3/8
0454.500 1/2
0454.750 3/4
0454 001. 1
0454 01.5 1¹/2
0454 002. 2
0454 02.5 2¹/2
0454 003. 3
0454 03.5 3¹/2
0454 004. 4
0454 005. 5
Voltage
Rating
125
125
125
125
125
125
125
125
125
125
125
Nominal
Resistance
Cold Ohms
1.20
0.700
0.360
0.225
0.0930
0.0625
0.0450
0.0340
0.0224
0.0186
0.0136
Nominal
Melting I²t
A² Sec.
0.101
0.240
0.904
1.98
3.65
8.20
15.0
20.16
26.53
34.40
53.72
0.1
0.01
0.1
1
10
100
CURRENT IN AMPERES
1000
Refer to pg. 271 for SMF Omni-Blok^® Holder, Series 154 000T.
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