42 surface mount fuses subminiature surface mount nano 2 umf fast-acting type fuse 455 series the nano 2 umf fuse is a very small, square surface mount fuse design. designed to international (iec) standards for use globally. meets iec 60127-4 umf specifications for fast-acting fuses electrical characteristics: % of ampere opening rating time 125% 1 hour, min imum 200% 2 minutes, max imum 1000% .001 sec, min ; .01 sec max agency approvals: listed to iec 60127-4, universal modular fuse-links (umf), 125v. agency file numbers: ul e184655. interrupting ratings: 50 amperes at 125 vac/vdc environmental specifications: operating temperature: 55 c to 125 c. shock: mil-std-202, method 213, test condition i (100 g s peak for 6 milliseconds). vibration: mil-std-202, method 201 (10 55 hz). salt spray: mil-std-202, method 101, test condition b. 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, test condition f (20 sec. at 260 c). thermal shock: mil-std-202, method 107, test condition b ( 65 to 125 c). moisture resistance: mil-std-202, method 106, high humidity (90-98 rh), heat (65 c). physical specifications: materials: body: ceramic terminations: tin-lead alloy plated caps. soldering parameters: wave solder 260 c, 10 seconds maximum reflow solder 260 c, 30 seconds maximum solderability: mil-std-202, method 208. packaging specifications: 12mm tape and reel per eia-rs481 -1 (iec 286, pa r t 3); 1,000 per reel, add packaging suffix, mr. patented ordering information: 100 10 1 0.1 0.01 0.001 .5a 1a 1.6a 0.05 0.1 1 10 100 1000 time in seconds current in amperes .4a average time current curves f 1 a 2.69 (.106") 2.69 (.106") 1.45 (.057") 6.10 (.240") recommended pad layout 1.52 (.060") 3.81 (.150") 2.03 (.080") 1.14 (.045") reflow solder nominal nominal catalog ampere voltage cold resistance melting i 2 t number rating rating (ohms) 1 (a 2 sec) 0455 .400 0.4 125 0.420 0.0795 0455 .500 0.5 125 0.305 0.143 0455 001. 1.0 125 0.078 0.645 0455 01.6 1.6 125 0.0532 1.060 1 measured at 10% of rated current, 25 c.
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