Surface Mount Fuses Subminiature Surface Mount RoHS PICO® SMF Slo-Blo Type Fuse 420 Series (250V) ® ® ELECTRICAL CHARACTERISTICS: % of Ampere Rating 100% 200% 300% 800% Opening Time 4 hours, Minimum 1 second, Min.; 120 seconds, Max. 0.2 second, Min.; 3 seconds, Max. 0.02 second, Min.; 0.1 second, Max. AGENCY APPROVALS: Recognized under the Components Program of Underwriters Laboratories and Certified by CSA. 460 SERIES INTERRUPTING RATINGS: 1A through 5A, 35A @ 250 VAC 0.5A, 20A @ 250 VAC Soldering Parameters: ® Wave Solder — 260°C, 3 seconds maximum Reflow Solder — 230°C, 30 seconds maximum 5A 250V LF 420 B3 ® 4.32 (.170") 7.24(.285") REF. 3.05 (.120") Resistance to Soldering Heat: MIL-STD-202, Method 210 (3 sec. at 260°C) 1.30(.051") REF. PACKAGING SPECIFICATIONS: 12mm Tape and Reel per EIARS481-1 (IEC 286, part 3); 500 per reel, add packaging suffix, UR. ORDERING INFORMATION: Catalog Number 0420 0001UR 0420 0002UR 0420 0003UR 0420 0004UR 0420 0005UR 0420 0006UR 0420 0007UR 0420 0008UR 0420 0009UR 2 Ampere Rating 1 11/2 2 21/2 3 31/2 4 5 1 /2 Voltage Rating 250 250 250 250 250 250 250 250 250 Nominal Resistance Cold Ohms 0.280 0.116 0.0172 0.052 0.038 0.024 0.0194 0.0133 1.19 Nominal Melting I 2t A2 Sec. 2.01 3.94 7.60 13.0 21.0 26.8 35.0 54.8 0.210 w w w. l i t t e l f u s e . c o m 8.26 (.325") 2.03 (.080") 1.65 (.065") 2.97 (.117") 4.95 (.195") RECOMMENDED PAD LAYOUT ®