AXIAL LEAD AND CARTRIDGE FUSES
SUBMINIATURE
PICO
®
II
Very Fast-Acting Type Fuse
The PICO
®
II very fast-acting fuse is designed to meet an
extensive array of performance characteristics in a space-
saving subminiature package.
ELECTRICAL CHARACTERISTICS:
% of Ampere
Rating
100%
200%
Ampere
Rating
1/16 –15
1/16 –7
10
12 –15
Opening
Time
4 hours,
Minimum
1 second,
Maximum
3 seconds,
Maximum
10 seconds,
Maximum
®
®
QPL
TIME IN SECONDS
AGENCY APPROVALS:
Recognized under the
Components Program of Underwriters Laboratories and
Certified by CSA. Approved by MITI from 1 through 5
amperes.
AGENCY FILE NUMBERS:
UL E10480, CSA LR 29862.
REFERENCE TO MIL SPEC:
Available in Military QPL
type FM10, conforming to MIL-PRF-23419. To order,
change
251
to
253
as shown below.
INTERRUPTING RATINGS:
300 amperes at 125 VDC.
50 amperes at 125 VAC.
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);
Method 204, Test Condition C (55–2000 Hz at 10 G’s Peak).
Moisture Resistance:
MIL-STD-202, Method 106.
PHYSICAL SPECIFICATIONS:
Materials:
Encapsulated, Epoxy-Coated Body; Solder
Coated Copper Wire Leads.
Soldering Parameters:
Wave Solder — 260°C, 10 seconds maximum.
Solderability:
MIL-STD-202, Method 208.
Lead Pull Force:
MIL-STD-202, Method 211, Test
Condition A (will withstand a 7 lb. axial pull test).
PACKAGING SPECIFICATIONS:
Tape and Reel per EIA-
296; T1: 2.062" (52.4mm) taped spacing; 5,000 per reel.
Option:
Radial Lead Version; 0.4" lead spacing; to order,
change
251
to
252.
PATENTED
ORDERING INFORMATION:
Std. Type
Catalog
Number
R251.062
R251.125
R251.250
R251.375
R251.500
R251.750
R251
001
R251
01.5
R251
002
R251
02.5
R251
003
R251
03.5
R251
004
R251
005
R251
007
R251
010
R251
012
R251
015
Mil. Type
Catalog
Number
R253.062
R253.125
R253.250
R253.375
R253.500
R253.750
R253
001
R253
01.5
R253
002
R253
003
R253
004
R253
005
R253
007
R253
010
R253
015
Ampere Voltage
Rating Rating
1/16
125
1/8
125
1/4
125
3/8
125
1/2
125
3/4
125
1
125
1
1
/
2
125
2
125
2
1
/
2
125
3
125
3
1
/
2
125
4
125
5
125
7
125
10
125
12
32
15
32
Nominal
Resistance
Cold Ohms
7.0
1.70
0.665
0.395
0.280
0.175
0.128
0.0823
0.0473
0.0360
0.0290
0.0240
0.0204
0.0155
0.0105
0.00705
0.0055
0.00446
Nominal
Melting I
2
t
A
2
Sec.
0.000113
0.00174
0.0116
0.0296
0.0598
0.153
0.256
0.587
0.405
0.721
1.19
1.58
2.45
4.14
10.4
25.5
45.2
68.8
1.5"
.280"
REF.
1.5"
.095" DIA. REF.
F
L
.025" DIA.
1A
EPOXY COATING
NOTE: .025" diameter for
1
/
16
–10A, .032" diameter for 12 –15A.
Average Time Current Curves
100
10
1
0.1
0.01
0.001
0.05 0.1
1/4A
3/8A
1/2A
3/4A
1A
1 1/2A
2A
2 1/2A
3A
3 1/2A
4A
5A
7A
10A
12A
15A
1
10
100
CURRENT IN AMPERES
1/16A
1/8A
1000
Note: Higher Ampere Ratings Available.
Contact Technical Assistance for Details
42
ETC [ ETC ]
