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| Axial Lead and Cartridge Fuses Subminiature MICROTM FUSE Very Fast-Acting Type 272/273/274/278/279 Series 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. (R) (R) QPL ELECTRICAL CHARACTERISTICS: % of Ampere Rating 100% 200% Ampere Rating 1/500 -5 1/500 -3/10 4/10 -5 Opening Time 4 hours, Minimum 5 seconds, Maximum 2 seconds, Maximum AGENCY APPROVALS: Recognized under the Components Program of Underwriters Laboratories and Certified by CSA. AGENCY FILE NUMBERS: UL E10480, CSA LR 29862. INTERRUPTING RATING: 10,000 amperes at 125 VAC/VDC. FUSES TO MIL SPEC: 273 Series is available in Military QPL type (FM02). To order, change 273 to 274. 272 000 Series 5.97 (.235") 7.30 (.29") 4.32 (.17") 273 000 Series 6.35 (.25") 8.89 (.35") (.17") 4.32 2.54 (.10") 2.54 (.10") Operating Temperature: 273 and 279: -55C to 85C. 272 and 278: -55C to 125C 278 000 Series 5.97 (.235") 7.30 (.29") 25.4 (1.0") 2.54 (.10") PATENTED ORDERING INFORMATION: Plug-In Catalog Number 272.002 272.005 272.010 272.015 272.031 272.050 272.062 272.100 272.125 272.200 272.250 272.300 272.400 272.500 272.600 272.700 272.750 272.800 272 001 272 01.5 272 002 272 003 272 004 272 005 Catalog Number 273.002 273.005 273.010 273.015 273.031 273.050 273.062 273.100 273.125 273.200 273.250 273.300 273.400 273.500 273.600 273.700 273.750 273.800 273 001 273 01.5 273 002 273 003 273 004 273 005 Radial Lead Catalog Number 278.002 278.005 278.010 278.015 278.031 278.050 278.062 278.100 278.125 278.200 278.250 278.300 278.400 278.500 278.600 278.700 278.750 278.800 278 001 278 01.5 278 002 278 003 278 004 278 005 Catalog Ampere Number Rating 279.002 1/500 279.005 1/200 279.010 1/100 279.015 1/64 279.031 1/32 279.050 1/20 279.062 1/16 279.100 1/10 279.125 1/8 279.200 2/10 279.250 1/4 279.300 3/10 279.400 4/10 279.500 1/2 279.600 6/10 279.700 7/10 279.750 3/4 279.800 8/10 279 001 1 279 01.5 11/2 279 002 2 279 003 3 279 004 4 279 005 5 Voltage Rating 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 125 Nominal Resistance Cold Ohms 2200 280 0. 80.0 44.0 16.0 3.20 2.32 1.25 1.0 2.30 1.75 1.25 0.227 0.167 0.430 0.324 0.293 0.271 0.0880 0.0578 0.0425 0.0275 0.0202 0.0156 Nominal Melting I 2t A2 Sec. 0.00000000845 0.0000000810 0.000000462 0.00000123 0.00000810 0.0000666 0.000115 0.000385 0.000691 0.00409 0.00640 0.00945 0.0251 0.0716 0.0411 0.0710 0.0900 0.113 0.0648 0.160 0.300 0.759 1.38 2.21 6.35 (.25") 279 000 Series 8.89 (.35") 25.4 (1.0") 2.54 (.10") NOTE: Amperage and voltage rating stamped on cap. Leads are solder-coated copper; .025" diameter. Average Time Current Curves 1/200 A 1/100 A 1/64 A 1/2 A 3/4 A 1A 1 1/2 A 2A 3A 4A 5A 1/32 A 1/16 A 1/8 A 1/4 A 100 10 TIME IN SECONDS 1 0.1 0.01 0.001 0.005 0.01 1 0.1 CURRENT IN AMPERES 10 100 394 w w w. l i t t e l f u s e . c o m |
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