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274.3

更新时间： 2024-11-06 07:21:47
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力特 - LITTELFUSE /
页数 文件大小 规格书
1页 118K
描述
Electric Fuse, Very Fast Blow, 0.3A, 125VAC, 125VDC, 10000A (IR), Inline/holder,

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274.3 数据手册

  
Axial Lead and Cartridge Fuses  
Subminiature  
MICRO™ FUSE Very Fast-Acting Type 272/273/274/278/279 Series  
®
®
QPL  
Developed originally for the U.S. Space Program, MICRO fuse provides  
reliability in a compact design. The MICRO fuse is available in plug in or  
radial lead styles and a complete range of ampere ratings from 1/500 to  
5 amperes to suit a wide variety of design needs.  
ELECTRICAL CHARACTERISTICS:  
% of Ampere  
Rating  
Ampere  
Rating  
Opening  
Time  
100%  
1/500–5  
1/500–3/10  
4/10–5  
4 hours, Minimum  
5 seconds, Maximum  
2 seconds, Maximum  
200%  
AGENCY APPROVALS: Recognized under the Components Program  
of Underwriters Laboratories and Certified by CSA.  
272 000 Series  
273 000 Series  
AGENCY FILE NUMBERS: UL E10480, CSA LR 29862.  
INTERRUPTING RATING: 10,000 amperes at 125 VAC/VDC.  
5.97  
(.235")  
7.30  
6.35  
8.89  
(.35")  
4.32  
(.17")  
4.32  
(.17")  
(.29")  
(.25")  
FUSES TO MIL SPEC: 273 Series is available in Military QPL type  
(FM02). To order, change 273 to 274.  
2.54 (.10")  
2.54 (.10")  
278 000 Series  
Operating Temperature:  
273 and 279: –55°C to 85°C.  
272 and 278: –55°C to 125°C  
5.97  
(.235")  
7.30  
(.29")  
25.4 (1.0")  
2.54 (.10")  
PATENTED  
279 000 Series  
ORDERING INFORMATION:  
6.35  
(.25")  
8.89  
25.4 (1.0")  
(.35")  
Plug-In  
Radial Lead  
Nominal  
Resistance  
Cold Ohms  
Nominal  
Melting I2t  
A2 Sec.  
Catalog Catalog Catalog Catalog Ampere Voltage  
Number Number Number Number  
2.54 (.10")  
Rating  
Rating  
272.002 273.002 278.002 279.002  
272.005 273.005 278.005 279.005  
272.010 273.010 278.010 279.010  
272.015 273.015 278.015 279.015  
272.031 273.031 278.031 279.031  
1/500  
1/200  
1/100  
1/64  
125  
125  
125  
125  
125  
2200  
2800.  
80.0  
44.0  
16.0  
0.00000000845  
0.0000000810  
0.000000462  
0.00000123  
NOTE: Amperage and voltage rating stamped on cap. Leads are solder-coated  
copper; .025" diameter.  
1/32  
0.00000810  
Average Time Current Curves  
272.050 273.050 278.050 279.050  
272.062 273.062 278.062 279.062  
272.100 273.100 278.100 279.100  
272.125 273.125 278.125 279.125  
272.200 273.200 278.200 279.200  
1/20  
1/16  
1/10  
1/8  
125  
125  
125  
125  
125  
3.20  
2.32  
1.25  
1.0  
0.0000666  
0.000115  
0.000385  
0.000691  
0.00409  
100  
10  
2/10  
2.30  
272.250 273.250 278.250 279.250  
272.300 273.300 278.300 279.300  
272.400 273.400 278.400 279.400  
272.500 273.500 278.500 279.500  
272.600 273.600 278.600 279.600  
1/4  
3/10  
4/10  
1/2  
125  
125  
125  
125  
125  
1.75  
1.25  
0.227  
0.167  
0.430  
0.00640  
0.00945  
0.0251  
0.0716  
0.0411  
6/10  
272.700 273.700 278.700 279.700  
272.750 273.750 278.750 279.750  
272.800 273.800 278.800 279.800  
272 001 273 001 278 001 279 001  
272 01.5 273 01.5 278 01.5 279 01.5  
7/10  
3/4  
8/10  
125  
125  
125  
125  
125  
0.324  
0.293  
0.271  
0.0880  
0.0578  
0.0710  
0.0900  
0.113  
0.0648  
0.160  
1
1 /  
1
1
2
272 002 273 002 278 002 279 002  
272 003 273 003 278 003 279 003  
272 004 273 004 278 004 279 004  
272 005 273 005 278 005 279 005  
2
3
4
5
125  
125  
125  
125  
0.0425  
0.0275  
0.0202  
0.0156  
0.300  
0.759  
1.38  
2.21  
0.1  
0.01  
0.001  
0.005 0.01  
1
10  
100  
0.1  
CURRENT IN AMPERES  
392  
www. littelfuse. com  
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