2 www.littelfuse.com subminiature surface mount pico smf slo-blo type fuse 420 series (250v) electrical characteristics: % of ampere opening rating time 100% 4 hours, min imum 200% 1 second, min.; 120 seconds, max. 300% 0.2 second, min.; 3 seconds, max. 800% 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?, 3 seconds maximum reflow solder ?230?, 30 seconds maximum resistance to soldering heat: mil-std-202, method 210 (3 sec. at 260?) packaging specifications: 12mm tape and reel per eia- rs481-1 (iec 286, part 3); 500 per reel, add packaging suffix, ur. ordering information : nominal nominal catalog ampere voltage resistance melting i 2 t number rating rating cold ohms a 2 sec. 0420 0001ur 1 250 0.280 2.01 0420 0002ur 1 1 / 2 250 0.116 3.94 0420 0003ur 2 250 0.0172 7.60 0420 0004ur 2 1 / 2 250 0.052 13.0 0420 0005ur 3 250 0.038 21.0 0420 0006ur 3 1 / 2 250 0.024 26.8 0420 0007ur 4 250 0.0194 35.0 0420 0008ur 5 250 0.0133 54.8 0420 0009ur 1 / 2 250 1.19 0.210 4.32 (.170") 5 a 2 5 0 v l f 4 2 0 b 3 3.05 (.120") 2.97 (.117") 7.24(.285") ref. 8.26 (.325") 1.65 (.065") 4.95 (.195") 1.30(.051") ref. 2.03 (.080") recommended pad layout rohs surface mount fuses
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