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Special Application Fuses 481 Series Alarm Indicating Fuse 481 Series Alarm Indicating Fuse Description 4FSJFT BMBSN JOEJDBUJOH GVTFT BSF EFTJHOFE UP SFEVDF XO PQFO Z JNNFEJBUFMZ QJOQPJOUJOH UIF CMP XO UJNF C EP IJT JUFN 5 DJSDVJU XIJMF USJHHFSJOH BO -&% PS BVEJP BMBSN SFRVJSFT 4FSJFT NBUJOH GVTF IPMEFS BJMBCMF BT PVS PSJHJOBM WMM SBOHFT PG 4FSJFT GVTFT BSF B P)4 BJMBCMF BT B 3 W X B EFTJHO BOE UIF BNQ SBOHF JT OP i1w EFTJHOBUPS XIFO PSEFSJOH DPNQMJBOU PQUJPO VTF UIF PS SFMBUFE 4FF UIF QBSU OVNCFSJOH TFDUJPO PG UIJT EBU B TIFFU G VDUJPOT PSEFSJOH JOTUS Agency Approvals Features t DPEFE JOEJDBUPS PMPS t VDUFE PG PEZ JT DPOTUS Agency Agency File Number BHT JOEJDBUF BNQFSF ZMFOF L QMPMZQIFO CMBD E71611 SBUJOH 7 TVMEF XJUI 6- BNNBCJMJU Z SBUJOH t MFBS QMBTUJD MFOT LR 29862 PS BJMBCMF G W PQUJPO B t POU BDUT NBEF PG FU Z BEEJUJPOBM TBG QMBUFE Z CSJHIU BMMP CFS ZJMMJPVN DPQQFS Electrical Characteristics % of Ampere Applications Opening Time Rating .JOVUFT .JOJNVN PS UFMFDPNNVOJDBUJPOT BOE DPOUSPM QBOFM DJSDVJUT *EFBM G .JOVUFT .BYJNVN 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) X FMMP : Y Y L FE MBD 3 Y Y 7JPMFU Y Y Z 8IJUF (SB Y Y FE 3 Y Y L MBD Y Y 7% XO SP Y Y Z (SB Y Y 7 8IJUF Y Y VQ UP 7 X 8IJUF FMMP : Y Y & 0SBOHF Y Y 7% 7% 0SBOHF 8IJUF Y Y VQ UP MVF Y Y MVF 8IJUF Y Y 7% XO 8IJUF SP Y Y VQ UP (SFFO Y Y L 8IJUF MBD Y Y FE 8IJUF 3 Y Y X FMMP (SFFO : Y Y FE MVF 3 Y Y (SFFO 8IJUF Y Y P)4 D PS TBMF BT B 3 BJMBCMF G W JUFNT BSF OPU B V UIS i1w PQUJPO PNQMJBOU VTF JT VTFIPMEFS NVTU CF VTFE FS SBUFE IPMEFST X FOU JOTFSUJPO JO MP W FE UP QSF Z F L VTFIPMEFS JT EFTJHOFE UP BDDFQU BMM SBUJOHT VQ UP BNQFS FT 2009 Littelfuse, Inc. Alarm Indicating Fuse 481 Series 347 Specifications are subject to change without notice. Revised: August 10, 2011 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 0 ZMFOF 4VMEF 6- 7 PMZQIFO PEZ 1 O O Operating Temperature 55 UP Material FS FSNJOBUJPOT ZMMJVN PQQFS 5JO 1MBUFE 5 O 8 JUITUDMFT PG o BOET DZ UP Thermal Shock O 125 FOT /ZMPO 0QUJPOBM - Insulation Resistance PINT (SFBUFS UIBO Vibration 5% 4 FS .*- 1 (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 VTF JT VTFIPMEFS NVTU CF VTFE E FS SBUFE IPMEFST X FOU JOTFSUJPO JO MP W UP QSF VTFIPMEFS JT EFTJHOFE UP BDDFQU BMM SBUJOHT VQ UP BNQFSFT 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 348 Specifications are subject to change without notice. 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 LFZF