376
Surface Mount Fuses
w w w . l i t t e l f u s e . c o m
Subminiature Surface Mount
NANO
2
UMF
Fast-Acting Fuse 455 Series
The Nano
2
UMF Fuse is a very small, square surface mount fuse design.
Designed to International (IEC) Standards for use globally.
Meets IEC 60127-4 UMF specifications for Fast-Acting Fuses
RoHS Compliant
version now available, use ordering suffix `L'
(see example on data sheet).
ELECTRICAL CHARACTERISTICS:
% of Ampere
Opening
Rating
Time
125%
1 hour, Minimum
200%
2 minutes, Maximum
1000% 0.001
sec,
Min; .01 sec Max
AGENCY APPROVALS:
Listed to IEC 60127-4, Universal Modular Fuse-
Links (UMF), 125V.
AGENCY FILE NUMBERS:
UL E184655.
INTERRUPTING RATINGS:
50 amperes at 125 VAC/VDC
ENVIRONMENTAL SPECIFICATIONS:
Operating Temperature:
55C to 125C.
Shock:
MIL-STD-202, Method 213, Test Condition I
(100 G's peak for 6 milliseconds).
Vibration
: MIL-STD-202, Method 201 (1055 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 260C).
Thermal Shock:
MIL-STD-202, Method 107,
Test Condition B (65 to 125C).
Moisture Resistance:
MIL-STD-202, Method 106, High Humidity (90-
98 RH), Heat (65C).
PHYSICAL SPECIFICATIONS:
Materials:
Body: Ceramic
Terminations: Tin-Lead Alloy
RoHS Compliant Terminations: Gold over Nickel Plated Caps
.
Soldering Parameters:
Wave Solder -- 260C, 10 seconds maximum
Reflow Solder -- 260C, 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 devices add the letter `L' to end of packag-
ing suffix. Example: 0455001.NRL (RoHS Compliant 1A, 5,000 per reel).
PATENTED
ORDERING INFORMATION:
100
10
1
0.1
0.01
0.001
.5A
1A
1.6A
0.05 0.1
1
10
100
1000
TIME IN SECONDS
CURRENT IN AMPERES
.4A
Average Time Current Curves
F
1 A
2.69
(.106")
2.69
(.106")
1.45
(.057")
6.10
(.240")
Nominal
Nominal
Catalog Ampere
Voltage Cold
Resistance
Melting
I
2
t
Number
Rating
Rating
(Ohms)
1
(A
2
sec)
0455.400
0.4
125
0.420
0.0795
0455.500
0.5
125
0.305
0.143
0455 001.
1.0
125
0.078
0.645
0455 01.6
1.6
125
0.0532
1.060
1
Measured at 10% of rated current, 25C.
6.86
(.270")
3.15
(.124")
2.95
(.116")
1.96
(.077")
Recommended pad layout
RoHS
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