Axial Lead and Cartridge Fuses
Subminiature
RoHS
PICO
®
II
Very Fast-Acting Fuse 251/253
®
®
QPL
The PICO
®
II very fast-acting fuse is designed to meet an extensive array
of performance characteristics in a space-saving subminiature package.
•
RoHS Compliant
version now available, use ordering suffix ‘L’
(see example on data sheet).
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
38.1
(1.5")
7.11 (.280")
REF.
38.1
(1.5")
2.80 (0.110")
DIA. 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.
REFERENCE TO MIL SPEC:
Available in FM10 on QPL for
MIL-PRF-23419. To order, change 251 to 253 as shown below.
INTERRUPTING RATINGS:
300 amperes at rated voltage VDC.
50 amperes at rated voltage VAC.
F
L
0.64 (.025")
DIA.
1A
EPOXY COATING
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.
NOTE: .025" diameter for
1
/
16
–10A, .032" diameter for 12 –15A.
PACKAGING SPECIFICATIONS:
Tape and Reel per EIA-296;
T1: 2.062" (52.4mm) taped spacing; 5,000 per reel.
Options:
For
RoHS Compliant
devices add the letter ‘L’ to end of
packaging suffix. Example:
0251001.NRT1L
(RoHS Compliant 1A,
5,000 per reel).
Average Time Current Curves
1/4A
3/8A
1/2A
3/4A
1A
1 1/4A
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
PHYSICAL SPECIFICATIONS:
Materials:
Encapsulated, Epoxy-Coated Body; Solder Coated Copper
Wire Leads. RoHS Compliant Product: Pure Tin coated copper wire leads.
Flammability Rating:
UL 94V0
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).
100
PATENTED
ORDERING INFORMATION:
Std. Type
Catalog
Number
0251.062
0251.125
0251.250
0251.375
0251.500
0251.750
0251
001
0251
1.25
0251
01.5
0251
002
0251
02.5
0251
003
0251
03.5
0251
004
0251
005
0251
007
0251
010
0251
012
0251
015
Mil. Type
Catalog
Number
0253.062
0253.125
0253.250
0253.375
0253.500
0253.750
0253
001
0253
01.5
0253
002
0253
003
0253
004
0253
005
0253
007
0253
010
0253
015
Ampere
Rating
1/16
1/8
1/4
3/8
1/2
3/4
1
1
1
/
4
1
1
/
2
2
2
1
/
2
3
3
1
/
2
4
5
7
10
12
15
Voltage
Rating
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
125
32
32
Nominal
Resistance
Cold Ohms
7.0
1.70
0.665
0.395
0.280
0.175
0.128
0.100
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
0.390
0.587
0.405
0.721
1.19
1.58
2.45
4.14
10.4
25.5
45.2
68.8
10
TIME IN SECONDS
1
0.1
0.01
Note: Higher Ampere Ratings Available.
Contact Technical Assistance for Details
0.001
0.05 0.1
1000
388
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