Special Application Fuses 481 Series Alarm Indicating Fuse 481 Series Alarm Indicating Fuse Description 481 Series alarm indicating fuses are designed to reduce down time by immediately pinpointing the blown (open) circuit while triggering an LED or audio alarm. This item requires 482 Series mating fuse holder. All ranges of 481 Series fuses are available as our original design, and the 2-20 amp range is now available as a RoHS compliant option (use the P designator when ordering). See the part numbering section of this data sheet for related ordering instructions. Agency Approvals Features t DPEFE JOEJDBUPS PMPS t VDUFE PG PEZ JT DPOTUS Agency Agency File Number ags indicate ampere black plolyphenylene E71611 rating. sulde with UL-94V0 ammability rating. t MFBS QMBTUJD MFOT LR 29862 option available for t POU BDUT NBEF PG additional safety. bright alloy-plated beryillioum copper. Electrical Characteristics % of Ampere Applications Opening Time Rating 100% 10 Minutes, Minimum Ideal for telecommunications and control panel circuits 150% 5 Minutes, Maximum Electrical Characteristics Agency Max Ampere Body Nominal Approvals Amp Voltage Interrupting Nominal Melting Rating Color Cold Resistance 2 2 Code Rating Rating I t (A Sec.) (A) Code (Ohms) (V) 0.180* .180 Yellow 6.25 0.00808 x x 0.200* .200 Red/Black 5.70 0.0140 x x 0.250* .250 Violet 4.20 0.0356 x x 0.375* .375 Gray/White 2.00 0.028 x x 0.500* .500 Red 1.52 0.139 x x 0.650* .650 Black 1.25 0.278 x x 450A 60 VDC 0.750* .750 Brown .980 0.363 x x 1.00* 001. Gray .665 0.733 x x 300A 125 VAC 1.33* 1.33 White .480 1.58 x x (up to 20A) 1.50* 01.5 125 VAC Yellow/White .385 2.55 x x 2.00 002. & Orange .120 5.29 x x 300A 125 VDC 2.50 02.5 125 VDC Orange/White .0904 9.46 x x (up to 15A) 3.00 003. Blue .0670 11.2 x x 3.50 03.5 Blue/White .0415 10.5 x x 200A 125 VDC 4.00 004. Brown/White .0350 15.4 x x (up to 20A) 5.00 005. Green .0285 26.2 x x 7.50 07.5 Black/White .0113 42.8 x x 10.0 010. Red/White .00840 115.3 x x 12.0 012. Green/Yellow .00660 222.5 x x 15.0 015. Red/Blue .00580 294.22 x x 20.0** 020. Green/White .00394 570.0 x x * 0.180A thru 1.5A items are not available for sale as a RoHS compliant P option **20A Fuseholder must be used. Fuse is keyed to prevent insertion in lower rated holders. 20A Fuseholder is designed to accept all ratings up to 20 amperes. 2009 Littelfuse, Inc. Alarm Indicating Fuse 481 Series 345 Specications are subject to change without notice. Revised: January 7, 2009 Please refer to www.littelfuse.com/series/481.html for current information. 481 SeriesIntrIntroduction toduction too Cir Circuit Prcuit Prototectionection Special Application Fuses Transientology 481 Series Alarm Indicating Fuse PrProduct Charoduct Charactactereristicsistics Body: Polyphenylene Sulde (UL 94VO) O O Operating Temperature 55 C to 90 C. Material Terminations: Beryllium Copper/Tin Plated O Withstands 5 cycles of 55 C to Thermal Shock O 125 C Optional Lens: Nylon Insulation Resistance Greater than 10,000 ohms. Vibration Per MIL-STD-202F (After Opening) Dimensions Average Time Current Curves 22.9mm (.90 ) MIN. 17.8mm (.70 ) 21.3mm (0.84 ) 1000 REF. LENS 19.6mm (.77 ) 11.7mm (.46 ) 100 16.9mm (.665 ) MAX. 4.45 2.77 2.79 (.175 ) (.109 ) (.110 ) 10 8mm 5.3mm .23 ) (.21 ) 1-15A 20A* 1 *20A Fuseholder must be used. Fuse is keyed to prevent insertion in lower rated holders. 20A Fuseholder is designed to accept all ratings up to 20 amperes. 0.1 0.01 Part Numbering System 0.1 1 10 100 1000 CURRENT IN AMPERES 0481 .180 H XL P RoHS ITEM OPTION CODE: Blank = Standard design item P = RoHS compliant version item (available in 2-20 amp range only) OPTION CODE: Blank = Standard XL = Protective Lens QUANTITY CODE: V = 5 pack H = 100 pack AMP CODE (See Electrical Characteristics Table) SERIES 2009 Littelfuse, Inc. Alarm Indicating Fuse 481 Series 346 Specications are subject to change without notice. Revised: January 7, 2009 Please refer to www.littelfuse.com/series/481.html for current information. TIME IN SECONDS 18/100 A 1/4 A 1/2 A 65/100 A 3/4 A 1 A 1 1/3 A 2 A 3 A 4 A 5 A 7 1/2 A 10 A 12 A 15 A 20 A