Subminiature
Axial Lead and Cartridge Fuses
PICO
II
Slo-Blo
Fuse 473 Series
391
w w w . l i t t e l f u s e . c o m
The PICO
II Slo-Blo
fuse combines time delay performance
characteristics with the proven reliability of a PICO
fuse.
RoHS Compliant
version now available, use ordering suffix `L'
(see example on data sheet).
ELECTRICAL CHARACTERISTICS:
% of Ampere
Opening
Rating
Time
100%
4 hours, Minimum
200%
1 second, Min.; 60 seconds, Max.
300%
0.2 second, Min.; 3 seconds, Max.
800%
0.02 second, Min.; 0.1 second, Max.
AGENCY APPROVALS:
Recognized under the Components Program
of Underwriters Laboratories and Certified by CSA. Approved by METI
from 1 through 5 amperes.
AGENCY FILE NUMBERS:
UL E10480, CSA LR 29862.
INTERRUPTING RATING:
50 amperes at 125 VDC/VAC
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); MIL-STD-202,
Method 204, Test Condition C (552000 Hz at 10 G's Peak).
Salt Spray:
MIL-STD-202, Method 101, Test Condition B.
Insulation Resistance (After Opening):
MIL-STD-202,
Method 302, (10,000 ohms minimum at 100 volts).
Resistance to Soldering Heat:
MIL-STD-202,
Method 210, Test Condition C (20 sec at 260C).
Thermal Shock:
MIL-STD-202, Method 107,
Test Condition B (65C to 125C).
Moisture Resistance:
MIL-STD-202, Method 106
(9098% RH), Heat (65C).
PHYSICAL SPECIFICATIONS:
Materials:
Encapsulated, Epoxy-Coated Body; Solder Coated Copper
Wire Leads. RoHS Compliant Product: Pure Tin coated copper
wire leads.
Soldering Parameters:
Wave Solder -- 260C, 3 seconds maximum.
Solderability:
MIL-STD-202, Method 208.
Lead Pull Force:
MIL-STD-202, Method 211, Test Condition A (will
withstand a 10 lb. axial pull test).
PATENTED
ORDERING INFORMATION:
1000
100
10
1
0.1
0.01
1000
100
10
1
0.1
.375A .50A
.75A 1.0A 1.5A 2.0A 2.5A 3.0A 3.5A 4.0A 5.0A 7.0A
TIME IN SECONDS
CURRENT IN AMPERES
Nominal
Nominal
Catalog
Ampere
Voltage
Resistance
Melting I
2
t
Number
Rating
Rating
Cold Ohms
A
2
Sec.
0473.375
3/8
125
1.74
0.0850
0473.500
1/2
125
1.13
0.210
0473.750
3/4
125
0.460
0.760
0473 001
1
125
0.267
2.01
0473 01.5
1
1
/
2
125
0.116
3.94
0473 002
2
125
0.0712
7.60
0473 2.25
2
1
/
4
125
0.0630
9.28
0473 02.5
2
1
/
2
125
0.0520
13.0
0473 003
3
125
0.0380
21.0
0473 03.5
3
1
/
2
125
0.0240
26.8
0473 004
4
125
0.0194
35.0
0473 005
5
125
0.0133
54.8
0473 007
7
125
0.0092
105.0
Average Time Current Curves
F
L
1 A
38.1
(1.5")
38.1
(1.5")
7.11 (.280")
REF.
0.64 (.025")
DIA.
3.175 (.125")
DIA. REF.
PACKAGING SPECIFICATIONS:
Tape and Reel per EIA-296;
T1: 2.062" (52.4mm) taped spacing; 4,000 per reel.
Options:
For
RoHS Compliant
devices add the letter `L' to end of
packaging suffix. Example: 473001.YRT1L (RoHS Compliant 1A,
4,000 per reel).
RoHS
11
AXIAL LEAD AND
CAR
TRIDGE FUSES
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