Special Application Fuses 481 Series Alarm Indicating Fuse 481 Series Alarm Indicating Fuse RoHS 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 Agency Agency File Number • Color-coded indicator • Body is constructed of flags indicate ampere black plolyphenylene E71611 0.180A - 20A rating. sulfide with UL 94 V-0 flammability rating. 29862 0.180A - 20A • Clear plastic lens option available for additional • Contacts made of bright safety. alloy-plated beryillium Electrical Characteristics copper. • RoHS compliant % of Ampere Opening Time Rating Applications 100% 10 Minutes, Minimum 150% 5 Minutes, Maximum Ideal for telecommunications and control panel circuits Electrical Characteristics Max Agency Ampere Amp Voltage Interrupting Body Nominal Nominal Melting Approvals Rating Color Cold Resistance Code Rating Rating I2t (A2 Sec.) (A) Code (Ohms) (V) 0.180* .180 Yellow 6.25 0.0400 x x 0.200* .200 Red/Black 5.70 0.0576 x x 0.250* .250 40A @ 175 VDC Violet 4.20 0.0625 x x 0.375* .375 Gray/White 2.00 0.230 x x 0.500* .500 Red 1.52 0.490 x x 0.650* .650 Black 1.25 0.723 x x 0.750* .750 450A @ 60 VDC Brown .980 1.32 x x 1.00* 001. Gray .665 1.82 x x 1.33* 1.33 300A @ 125 VAC White .480 3.13 x x 1.50* 01.5 125 VAC (up to 20A) Yellow/White .385 2.55 x x 2.00 002. & Orange .120 10.2 x x 2.50 02.5 125 VDC 300A @ 125 VDC Orange/White 0.093 16.0 x x 3.00 003. (up to 15A) Blue .0670 25.0 x x 3.50 03.5 Blue/White .0415 10.5 x x 4.00 004. 200A @ 125 VDC Brown/White .0350 36.0 x x 5.00 005. (up to 20A) Green .0285 64.0 x x 7.50 07.5 White/Black .0113 121.0 x x 10.0 010. 460A @ 60 VDC White/Red .00840 380.3 x x 12.0 012. (up to 15A) Yellow/Green .00660 571.2 x x 15.0 015. Blue/Red .00580 900.0 x x 20.0** 020. White/Green .00394 1024.0 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. © 2018 Littelfuse, Inc. Specifications are subject to change without notice. Application testing is strongly recommended. Specifications are subject to change without notice. Revised: 06/14/18

Special Application Fuses 481 Series Alarm Indicating Fuse PPrroodduucctt CChhaarraacctteerriissttiiccss Body: Polyphenylene Sulfide (UL 94VO) Operating Temperature – 55OC to 125OC. Material Terminations: Beryllium Copper/Tin Plated Withstands 5 cycles of – 55OC to Thermal Shock 125OC Optional Lens: Nylon Insulation Resistance Vibration MIL-STD-202 Method 201 Greater than 10,000 ohms. (After Opening) Dimensions Average Time Current Curves 22.9mm A A (.90") MIN. 0 0 A A 17.8mm (.70") 2(01..834m"m) 18/101/4 A1/2 A65/103/4 A1 A1 1/3 2 A3 A4 A5 A7 1/2 10 A12 A15 A20 A 1000 LENS REF. 19.6mm (.77") 11.7mm (.46") 100 16.9mm S (.665") MAX. 2.77 (.41.7455") 2.79 OND (.109") (.110") EC 10 S N 5.8mm 5.3mm E I (.23") (.21") M TI 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 M P RoHS ITEM OPTION CODE: Blank = Standard design item P = RoHS compliant version item Additional Information (available in 2-20 Amp Range only) AMPERAGE STAMPING MARK: 1481001 Blank = Standard design item M = Front Side ACCESSORY: Datasheet Resources Samples Blank = Standard design item X = Filler XL = Protective Lens QUANTITY CODE: V = 5 pack H = 100 pack AMP COLOR CODE: (See Electrical Characteristics Table) FUSE SERIES Disclaimer Notice - Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at: www.littelfuse.com/disclaimer-electronics. © 2018 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 06/14/18