AXIAL LEAD AND CARTRIDGE FUSES
SUBMINIATURE
PICO® II Very Fast-Acting Type Fuse
®
®
QPL
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
Ampere
Rating
Opening
Time
100%
1/16–15
1/16–7
10
4 hours, Minimum
1 second, Maximum
3 seconds, Maximum
10 seconds, Maximum
200%
12–15
AGENCY APPROVALS: Recognized under the
Components Program of Underwriters Laboratories and
Certified by CSA. Approved by MITI from 1 through 5
amperes.
.280"
REF.
1.5"
1.5"
F
AGENCY FILE NUMBERS: UL E10480, CSA LR 29862.
1 A
L
.095" DIA. REF.
REFERENCE TO MIL SPEC: Available in Military QPL
type FM10, conforming to MIL-PRF-23419. To order,
change 251 to 253 as shown below.
.025" DIA.
EPOXY COATING
INTERRUPTING RATINGS:
300 amperes at 125 VDC.
50 amperes at 125 VAC.
1
16
NOTE: .025" diameter for / –10A, .032" diameter for 12 –15A.
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.
Average Time Current Curves
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.
100
10
PATENTED
ORDERING INFORMATION:
1
Std. Type
Catalog
Number
Mil. Type
Catalog
Number
Nominal
Resistance
Cold Ohms
Nominal
Melting I2t
A2 Sec.
Ampere Voltage
Rating
Rating
R251.062
R251.125
R251.250
R251.375
R253.062
R253.125
R253.250
R253.375
1/16
1/8
1/4
3/8
125
125
125
125
7.0
0.000113
0.00174
0.0116
1.70
0.665
0.395
0.1
0.0296
R251.500
R251.750
R251 001
R253.500
R253.750
R253 001
1/2
3/4
125
125
125
125
125
125
125
125
125
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
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
1
0.01
0.001
2
R251 01.5 R253 01.5
1 /
R251 002
R251 02.5
R251 003
R251 03.5
R251 004
R251 005
R251 007
R251 010
R251 012
R251 015
R253 002
R253 003
R253 004
R253 005
R253 007
R253 010
2
1
2
2 /
3
1
2
3 /
4
5
7
10
12
15
125
125
125
32
0.05 0.1
1
10
100
1000
CURRENT IN AMPERES
R253 015
32
Note: Higher Ampere Ratings Available.
Contact Technical Assistance for Details
42