376 surface mount fuses www.littelfuse.com subminiature surface mount nano 2 umf fast-acting 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 ? rohs compliant version now available, use ordering suffix ? (see example on data sheet). electrical characteristics: % of ampere opening rating time 125% 1 hour, min imum 200% 2 minutes, max imum 1000% 0.001 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? to 125?. 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 b (10 sec. at 260?). thermal shock: mil-std-202, method 107, test condition b (?5 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 . soldering parameters: wave solder ?260?, 10 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 devices add the letter ? to end of packag- ing suffix. example: 0455001.nrl (rohs compliant 1a, 5,000 per reel). 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") 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?. 6.86 (.270") 3.15 (.124") 2.95 (.116") 1.96 (.077") recommended pad layout rohs
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