Surface Mount Fuses
Subminiature Surface Mount
RoHS
NANO
2® Slo-Blo
®
Fuse 452/454 Series
®
®
The NANO
2
Slo-Blo fuse has enhanced inrush withstand characteristics
over the NANO
2
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.
• 452 Series
RoHS Compliant
version now available, use ordering suffix
‘L’ (see example on data sheet).
ELECTRICAL CHARACTERISTICS:
% of Ampere
Rating
100%
200%
300%
800%
Opening
Time
4 hours,
Minimum
1 second,
Min.;
60 seconds,
Max.
0.2 seconds,
Min.;
3 seconds,
Max.
0.02 seconds,
Min.;
0.1 seconds,
Max.
6.86
(.270")
3.15
(.124")
2.95
1.96 (.116")
(.077")
Recommended pad layout
1.45
(.057")
6.10
(.240")
F
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
T
1A
2.69
(.106")
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).
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).
Average Time Current Curves
3/8A
1/2A
3/4A
1A
1 1/2A
2A
2 1/2A
3A
3 1/2A
4A
5A
1000
100
PHYSICAL SPECIFICATIONS:
Materials:
Body: Ceramic
Terminations: Tin-Lead Alloy
RoHS Compliant Terminations: Gold over Nickel Plated Caps(452)
Silver Plated Caps(454)
10
SURFACE MOUNT
FUSES
1
10
100
CURRENT IN AMPERES
1000
Wave Solder — 260°C, 3 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, part3); 1,000 pieces per reel, add packaging
suffix, MR; 5,000 per reel, add packaging suffix NR.
Options:
For RoHS Compliant 452 series add the letter ‘L’ to end of pack-
aging suffix. Example: 0452001.MRL (RoHS Compliant 1A, 1,000 per reel).
TIME IN SECONDS
Soldering Parameters:
10
1
PATENTED
ORDERING INFORMATION:
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
1
1
/
2
0454
002.
2
0454
02.5
2
1
/
2
0454
003.
3
0454
03.5
3
1
/
2
0454
004.
4
0454
005.
5
Voltage
Rating
125
125
125
125
125
125
125
125
125
125
125
Nominal
Nominal
Resistance Melting I
2
t
Cold Ohms
A
2
Sec.
1.20
0.101
0.700
0.240
0.360
0.904
0.225
1.98
0.0930
3.65
0.0625
8.20
0.0450
15.0
0.0340
20.16
0.0224
26.53
0.0186
34.40
0.0136
53.72
0.1
0.01
0.1
Refer to pg. 271 for SMF Omni-Blok
®
Holder, Series
154
000T.
375
w w w. l i t t e l f u s e . c o m
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