Fuse Mounting Accessories Page 120 Fuse & Mounting Accessories

2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/03/17 Radial Lead Fuses MICRO > Very Fast-Acting Fuse > 272/273/274/278/279 Series 272/273/274/278/279 Series, MICRO Very Fast-Acting Fuse Description 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 0.002A to 5A to suit a wide variety of design needs. Agency Approvals Agency Agency File Number Ampere Range E10480 0.002A - 5A 29862 0.002A - 5A QPL FM02 0.002A - 5A Features Electrical Characteristics Applications QPL % of Ampere Rating Ampere Rating Opening Time 100% 0.002 - 5 4 Hours, Min. 200% 0.002 - 0.3 5 Seconds, Max. 0.4 - 5 2 Seconds, Max. Ampere Rating (A) Amp Code (for all above series) Max Voltage Rating (V) Interrupting Rating Nominal Cold Resistance (Ohms) Nominal Melting I 2 t (A 2 sec) Agency Approvals QPL .002 125 10,000A@125VAC/VDC 2200 0.00000000845 X .005 125 280 0.0000000766 X .010 125 80.0 0.000000462 X .015 125 44.0 0.00000123 X .031 125 16.0 0.00000810 X .050 125 3.52 0.0000666 X .062 125 2.55 0.000115 X .100 125 1.38 0.000385 X .125 125 1.0 0.000691 X .200 125 2.30 0.00409 X .250 125 1.75 0.00640 X .300 125 1.25 0.00945 X .400 125 0.227 0.0251 X .500 125 0.167 0.0716 X .600 125 0.430 0.0411 X .700 125 0.324 0.0710 X .750 125 0.293 0.0563 X .800 125 0.271 0.113 X 1.00 001. 125 0.0880 0.0648 X 01.5 125 0.0578 0.160 X 2.00 002. 125 0.0425 0.300 X 3.00 003. 125 0.0275 0.759 X *4.00 004. 125 0.0202 1.38 X *5.00 005. 125 0.0156 2.21 X Electrical Characteristics Military grade available High breaking capacity Clear cover option to view fuse element status Available from very low ampere of 0.002A to 5A Plug-in with short or long leads option Printed circuit boards and similar equipment Electronic components Specifications are subject to change without notice. Application testing is strongly recommended. * The fuses of 4A and 5A for 272 and 278 Series are obsolete.

Previous Page
Next Page