Special Application Fuses 481 Series Alarm Indicating Fuse 481 Series Alarm Indicating Fuse Description 4FSJFTBMBSNJOEJDBUJOHGVTFTBSFEFTJHOFEUPSFEVDF EPXOUJNFCZJNNFEJBUFMZQJOQPJOUJOHUIFCMPXOPQFO DJSDVJUXIJMFUSJHHFSJOHBO-&%PSBVEJPBMBSN5IJTJUFN SFRVJSFT4FSJFTNBUJOHGVTFIPMEFS "MMSBOHFTPG4FSJFTGVTFTBSFBWBJMBCMFBTPVSPSJHJOBM EFTJHOBOEUIFBNQSBOHFJTOPXBWBJMBCMFBTB3P)4 DPNQMJBOUPQUJPOVTFUIFi1wEFTJHOBUPSXIFOPSEFSJOH 4FFUIFQBSUOVNCFSJOHTFDUJPOPGUIJTEBUBTIFFUGPSSFMBUFE PSEFSJOHJOTUSVDUJPOT Agency Approvals Features Agency t $PMPSDPEFEJOEJDBUPS ýBHTJOEJDBUFBNQFSF SBUJOH Agency File Number E71611 t $MFBSQMBTUJDMFOT PQUJPOBWBJMBCMFGPS BEEJUJPOBMTBGFUZ LR 29862 Electrical Characteristics % of Ampere Rating Opening Time .JOVUFT.JOJNVN .JOVUFT.BYJNVN t #PEZJTDPOTUSVDUFEPG CMBDLQMPMZQIFOZMFOF TVMåEFXJUI6-7 ýBNNBCJMJUZSBUJOH t $POUBDUTNBEFPG CSJHIUBMMPZQMBUFE CFSZJMMJPVNDPQQFS Applications *EFBMGPSUFMFDPNNVOJDBUJPOTBOEDPOUSPMQBOFMDJSDVJUT Electrical Characteristics Amp Code Max Voltage Rating (V) "!7%$ 7"$ & 7%$ Body Color Code Nominal Cold Resistance (Ohms) Nominal Melting I2t (A2 Sec.) :FMMPX 3FE#MBDL 7JPMFU (SBZ8IJUF 3FE #MBDL #SPXO (SBZ 8IJUF :FMMPX8IJUF 0SBOHF 0SBOHF8IJUF #MVF #MVF8IJUF #SPXO8IJUF (SFFO #MBDL8IJUF 3FE8IJUF (SFFO:FMMPX 3FE#MVF (SFFO8IJUF Interrupting Rating "!7"$ VQUP" "!7%$ VQUP" "!7%$ VQUP" Agency Approvals Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y "UISV"JUFNTBSFOPUBWBJMBCMFGPSTBMFBTB3P)4DPNQMJBOUi1wPQUJPO "'VTFIPMEFSNVTUCFVTFE'VTFJTLFZFEUPQSFWFOUJOTFSUJPOJOMPXFSSBUFEIPMEFST "'VTFIPMEFSJTEFTJHOFEUPBDDFQUBMMSBUJOHTVQUPBNQFSFT © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/481.html for current information. 347 Revised: August 10, 2011 Alarm Indicating Fuse 481 Series 481 Series Ampere Rating (A) Introduction to Application Circuit Protection Special Fuses Transientology 481 Series Alarm Indicating Fuse Product Characteristics #PEZ1PMZQIFOZMFOF4VMåEF6-70 Material 5FSNJOBUJPOT#FSZMMJVN$PQQFS5JO1MBUFE Operating Temperature – 55O$UPO$ Thermal Shock 8JUITUBOETDZDMFTPGoO$UP 125O$ Insulation Resistance (After Opening) (SFBUFSUIBOPINT 0QUJPOBM-FOT/ZMPO Vibration 1FS.*-45%' Dimensions 22.9mm (.90") MIN. 17.8mm (.70") 21.3mm (0.84") REF. LENS 11.7mm (.46") 16.9mm (.665") MAX. 100 2.77 (.109") 8mm .23") 4.45 (.175") TIME IN SECONDS 19.6mm (.77") 1000 18/100 A 1/4 A 1/2 A 65/100 A 3/4 A 1A 1 1/3 A 2A 3A 4A 5A 7 1/2 A 10 A 12 A 15 A 20 A Average Time Current Curves 2.79 (.110") 5.3mm (.21") 1-15A 20A* 10 1 "'VTFIPMEFSNVTUCFVTFE'VTFJTLFZFE UPQSFWFOUJOTFSUJPOJOMPXFSSBUFEIPMEFST "'VTFIPMEFSJTEFTJHOFEUPBDDFQUBMM SBUJOHTVQUPBNQFSFT 0.1 0.01 0.1 Part Numbering System 1 10 100 CURRENT IN AMPERES 1000 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 Alarm Indicating Fuse 481 Series 348 © 2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com/series/481.html for current information.