377 surface mount fuses www.littelfuse.com subminiature surface mount nano 2? slo-blo ? fuse 452/454 series tin-lead silver nominal nominal plated plated ampere voltage resistance melting i 2 t catalog # catalog # rating rating cold ohms a 2 sec. 0452 .375 0454 .375 3/8 125 1.20 0.101 0452 .500 0454 .500 1/2 125 0.700 0.240 0452 .750 0454 .750 3/4 125 0.360 0.904 0452 001. 0454 001. 1 125 0.225 1.98 0452 01.5 0454 01.5 1 1 / 2 125 0.0930 3.65 0452 002. 0454 002. 2 125 0.0625 8.20 0452 02.5 0454 02.5 2 1 / 2 125 0.0450 15.0 0452 003. 0454 003. 3 125 0.0340 20.16 0452 03.5 0454 03.5 3 1 / 2 125 0.0224 26.53 0452 004. 0454 004. 4 125 0.0186 34.40 0452 005. 0454 005. 5 125 0.0136 53.72 the nano 2 slo-blo fuse has enhanced inrush withstand characteristics over the nano 2 fast-acting fuse. the unique time delay feature of this fuse design helps solve the problem of nuisance pening by accommodating inrush currents that normally cause a fast-acting fuse to open. ?452 series rohs compliant version now available, use ordering suffix (see example on data sheet). electrical characteristics: % of ampere opening rating time 100% 4 hours, min imum 200% 1 second, min.; 60 seconds, max. 300% 0.2 seconds, min.; 3 seconds, max. 800% 0.02 seconds, min.; 0.1 seconds, max . agency approvals: recognized under the components program of underwriters laboratories and certified by csa. approved by meti from 1 through 5 amperes. agency file numbers: ul e10480, csa lr 29862. interrupting ratings: 50 amperes at 125 vac/vdc; 300 amperes at 32 vdc environmental specifications: operating temperature: C55 to 125?. shock: mil-std-202, method 213, test condition i (100 gs peak for 6 milliseconds). vibration: mil-std-202, method 201 (10C55 hz, .06 in. total excursion). salt spray: mil-std-202, method 101, test condition b (48 hrs.). insulation resistance (after opening): mil-std-202, method 302, test condition a, (10,000 ohms minimum). resistance to soldering heat: mil-std-202, method 210, (3 sec. at 260). thermal shock: mil-std-202, method 107, test condition b (C65 to 125). moisture resistance: mil-std-202, method 106, high humidity (90-98 rh), heat (65). physical specifications: materials: body: ceramic terminations: tin-lead alloy rohs compliant terminations: gold over nickel plated caps(452) silver plated caps(454) soldering parameters: wave solder 260?, 3 seconds maximum reflow solder 260?, 30 seconds maximum solderability: mil-std-202, method 208. packaging specifications: 12mm tape and reel per eia-rs481-1 (iec 286, part3); 1,000 pieces per reel, add packaging suffix, mr; 5,000 per reel, add packaging suffix nr. options: for rohs compliant 452 series add the letter to end of packaging suffix. example: 0452001.mrl (rohs compliant 1a, 1,000 per reel). patented ordering information: 1000 100 10 1 0.1 0.01 1000 100 10 1 0.1 3/8a 1/2a 3/4a 1a 1 1/2a 2a 2 1/2a 3a 3 1/2a 4a 5a time in seconds current in amperes refer to pg. 271 for smf omni-blok ? holder, series 154 000t. ? ? average time current curves 1 a t 6.86
(.270") 3.15
(.124") 2.95
(.116") 1.96
(.077") 2.69
(.106") 2.69
(.106") 1.45
(.057") 6.10
(.240") recommended pad layout f rohs 10 surf a ce mount fuses
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