Blade Terminal & Special Purpose Fuses Low Voltage RoHS ATO® Fuse Fast-Acting Type U® L Designed and originated by Littelfuse for the automotive industry, the ATO fuse has become the original equipment circuit protection standard for foreign and domestic automobiles and trucks. Readily identifiable and easily replaced, this fuse can be specified for a variety of low voltage electronic applications. ELECTRICAL CHARACTERISTICS: % of Ampere Rating 110% 135% 200% 350% Ampere Rating 1– 40 Amp 1–2 Amp 3 – 40 Amp 1–2 Amp 3 – 40 Amp 1–2 Amp 3 – 40 Amp Opening Time 100 Hours Minimum .50 sec., Min.; 600 sec., Max. .75 sec., Min.; 600 sec., Max. .10 sec., Min.; 5 sec., Max. .15 sec., Min.; 5 sec., Max. .020 sec., Min.; 0.5 sec., Max. .080 sec., Min.; 0.5 sec., Max. AGENCY APPROVALS: Listed by Underwriters Laboratories (1– 40 amperes). Certified by CSA (3 – 30 amperes). DESIGN STANDARDS: U.L. Standard for Automotive Blade Type Fuses. SAE (Society of Automotive Engineers) J1284. Reference Dimensions 19.05 (.75") 5.08 (.20") 12.19 (.48") 6.35 (.25") PATENTED COLOR-CODING: Autofuse® fuses are color-coded for easy 0.66 (.026") 4.064 (.16") 14.48 (.57") amperage identification. INTERRUPTING RATING: 1000A @ 32VDC ORDERING INFORMATION: Nominal Cold Resistance Ohms 0.123 0.050 0.031 0.023 0.018 0.011 0.0077 0.0048 0.0033 0.0025 0.0019 0.0016 0.0014 Minimum Melting I 2 t (A2 Sec.) .4 1.4 7.4 14 26 60 115 340 520 1080 1510 2280 3310 Average Time Current Curves 2A 3A 4A 5A 7.5A 10A 15A 20A 25A 30A 35A 40A Voltage Body Rating Color (VDC) Code 32 Black 32 Grey 32 Violet 32 Pink 32 Tan 32 Brown 32 Red 32 Blue 32 Yellow 32 Natural 32 Green 32 Blue Green 32 Orange 1A Ampere Rating (A) 1 2 3 4 5 71/2 10 15 20 25 30 35 40 1000 100 TIME IN SECONDS Catalog Number 257 001 257 002 257 003 257 004 257 005 257 07.5 257 010 257 015 257 020 257 025 257 030 257 035 257 040 10 1 0.1 0.01 1 10 100 1000 CURRENT IN AMPERES Reference pg. 344, ATO® Fuse Clip for P.C. Board mounting. 450 w w w. l i t t e l f u s e . c o m ®