tin-lead silver nominal nominal plated plated ampere voltage resistance melting i 2 t catalog # catalog # rating rating cold ohms a 2 sec. r452 .375 0454 .375 3/8 125 1.60 0.101 r452 .500 0454 .500 1/2 125 0.940 0.240 r452 .750 0454 .750 3/4 125 0.460 0.904 r452 001. 0454 001. 1 125 0.270 1.98 r452 01.5 0454 01.5 1 1 / 2 125 0.116 3.65 r452 002. 0454 002. 2 125 0.0760 8.20 r452 02.5 0454 02.5 2 1 / 2 125 0.0540 15.0 r452 003. 0454 003. 3 125 0.0414 20.16 r452 03.5 0454 03.5 3 1 / 2 125 0.0224 26.53 r452 004. 0454 004. 4 125 0.0186 34.40 r452 005. 0454 005. 5 125 0.0136 53.72 35 surface mount fuses subminiature surface mount nano 2? smf slo-blo ? type fuse the very small nano 2 fuse with time delay performance characteristics. the unique time delay feature of this fuse design helps solve the problem of nuisance opening by accommodating inrush currents that normally cause a fast- acting fuse to open. 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. agency file numbers: ul e10480, csa lr 29862. interrupting ratings: 50 amperes at 125 vac 50 amperes at 125 vdc 300 amperes at 32 vdc environmental specifications: operating temperature: C55c to 125c. 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 260c). thermal shock: mil-std-202, method 107, test condition b (C65 to 125c). moisture resistance: mil-std-202, method 106, high humidity (90-98 rh), heat (65c). physical specifications: materials: body: ceramic terminations: tin-lead alloy or silver plated brass caps. soldering parameters: wave solder 260c, 3 seconds maximum reflow solder 230c, 30 seconds maximum solderability: mil-std-202, method 208. packaging specifications: 12mm tape and reel per eia-rs481 (iec 286, part 3); 1,000 per reel. marking: the 452/454 series slo-blo fuse marking includes the letter t to designate time delay characteristics. 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. 102 for smf omni-blok ? holder, series 154 000t. average time current curves l f 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") note: metric dimensions shown. inch dimensions are in parentheses. recommended pad layout
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