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0251.750

更新时间： 2024-11-02 13:45:35
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力特 - LITTELFUSE /
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0251.750 数据手册

  
Axial Lead and Cartridge Fuses  
Subminiature  
PICO® II Very Fast-Acting Fuse 251/253  
®
QPL  
RoHS  
®
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  
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 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:  
38.1  
38.1  
(1.5")  
7.11 (.280")  
REF.  
(1.5")  
2.80 (0.110")  
DIA. MAX.  
F
1 A  
L
0.64 (.025")  
DIA.  
EPOXY COATING  
300 amperes at rated voltage VDC.  
50 amperes at rated voltage 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:  
1
16  
NOTE: .025" diameter for / –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).  
Materials: Encapsulated, Epoxy-Coated Body; Solder Coated Copper  
Wire Leads. RoHS Compliant Product: Pure Tin coated copper wire leads.  
Flammability Rating: UL 94V0  
Average Time Current Curves  
Soldering Parameters:  
100  
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).  
PATENTED  
10  
ORDERING INFORMATION:  
Std. Type  
Catalog  
Number  
Mil. Type  
Catalog  
Number  
Nominal  
Resistance  
Cold Ohms  
Nominal  
Melting I2t  
A2 Sec.  
Ampere Voltage  
Rating  
Rating  
1
0251.062  
0251.125  
0251.250  
0251.375  
0253.062  
0253.125  
0253.250  
0253.375  
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  
0.0296  
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  
0253.500  
0253.750  
0253 001  
1/2  
3/4  
125  
125  
125  
125  
125  
125  
125  
125  
125  
125  
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  
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  
0.1  
1
1
4
1 /  
1
2
0253 01.5  
0253 002  
1 /  
2
1
2
2 /  
0253 003  
0253 004  
0253 005  
0253 007  
0253 010  
3
1
2
0.01  
0.001  
3 /  
4
5
7
10  
12  
15  
125  
125  
125  
32  
0253 015  
32  
0.05 0.1  
1
10  
100  
1000  
Note: Higher Ampere Ratings Available.  
Contact Technical Assistance for Details  
CURRENT IN AMPERES  
388  
www. lit t elf us e. c om  
1

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