typical voltage agency* rated interrupting pre-arcing 2 typical total clearing 2 drop volts at approvals current voltage rating 1 i 2 t (a 2 sec) i 2 t (a 2 sec) 100% rated rating ac (max.) dc (max.) ac dc ac dc ac dc current ? 125v 125v 50a 300a 1.1 ? 10 -6 1.0 ? 10 -7 1.8 ? 10 -6 1.5 ? 10 -7 2.33 ?? ? 125v 125v 50a 300a 4.3 ? 10 -6 7.1 ? 10 -7 7.3 ? 10 -6 8.7 ? 10 -7 1.52 ?? ? 125v 125v 50a 300a 8.0 ? 10 -5 1.0 ? 10 -6 1.2 ? 10 -4 1.3 ? 10 -6 .76 ?? ? 125v 125v 50a 300a 9.7 ? 10 -5 6.7 ? 10 -6 1.1 ? 10 -4 8.3 ? 10 -6 .73 ?? ?a 125v 125v 50a 300a 7.4 ? 10 -4 5.4 ? 10 -5 6.2 ? 10 -3 6.8 ? 10 -5 .65 ?? ? 125v 125v 50a 300a 1.3 ? 10 -3 7.4 ? 10 -5 7.5 ? 10 -2 9.2 ? 10 -5 .55 ?? 1 125v 125v 50a 300a .01 .01 .02 .01 .24 ??? 1 ?a 125v 125v 50a 300a .03 .02 .04 .03 .20 ??? 2 125v 125v 50a 300a .09 .07 .11 .08 .16 ??? 2 ?a 125v 125v 50a 300a .19 .14 .25 .17 .15 ??? 3 125v 125v 50a 300a .35 .28 .45 .32 .15 ??? 3 ?a 125v 125v 50a 300a .56 .37 .83 .43 .14 ??? 4 125v 125v 50a 300a .96 .67 1.37 .77 .13 ??? 5 125v 125v 50a 300a 1.82 1.34 2.53 1.51 .11 ??? 7 60v 90v 50a 300a 1.48 .49 2.02 .58 .10 ?? 10 60v 90v 50a 300a 3.62 1.16 4.41 1.38 .08 ?? * approvals: ul recognition std 248-14, guide jdyx2, file e19180; csa certification, class 1422-01, file 53787. jis (japanese industrial standard) reg. no. 2221, authorization no. 32-1516. 1. interrupting ratings were measured at 100% ( ? to 5) and 100% (7, 10) power factors on ac, and a time constant less than 1ms. on d.c. 2. i 2 t was measured at 50 amps 125 vac, .95pf, (random closing angle) and 300 amps 125 vdc, tc <1ms. for ? through 5 amps and 50 amps 60 vac, .95pf, (random closing angle), and 300 amps 90 vdc, tc <1ms. for the 7 and 10 amp fuses. note: all values shown above are typical. microtron ? printed circuit board fuses mcr .122 ? .297 (3.10mm ? 7.54mm) form no. mcr page 1 of 2 bif doc #2003 bussmann ? bussmann rev. 7/28/97 dimensional data 1.13" 28.58mm .297" 7.54mm .12" 3.10mm .025" 0.64mm 1.13" 28.58mm *all tolerances: 0.13mm 0.005" r ampere rating 1/16 1/2 3/4 1/8 1/4 3/8 1.0 1.5 2.0 2.5 4.0 5.0 7.0 10.0 3.0 current in amperes 10 1 .1 .01 .001 time in seconds 1 .1 10 100 .01 time-current characteristic curvesCaverage melt (full size curves available) product rated current symbol package code blank 10 in bk 500 in tr/ tape/reel 2500 units, 52.4mm spacing tr1/ tape/reel 5000 units, 52.4mm spacing tr6/ tape/reel 1000 units, 52.4mm spacing radial leaded versions available (.4 , .6 spacing) weight = 2.45 lbs/2500 time-current characteristics: rated percent of rating current 100% 250% 0-10a 4 hrs. (min) 5 sec. (max) (see table) mcr product name: mcr (microtron ? ) characteristics: fast-acting, current-limiting construction: solid matrix packaging & ordering information: ur csa jis electrical characteristics ce logo denotes compliance with european union low voltage directive (50-1000 vac, 75-1500 vdc). refer to bif document #8002 or contact bussmann application engineering at 314-527-1270 for more information.
micr otr on ? printed cir cuit boar d fuses mcr .122 ? .297 (3.10mm ? 7.54mm) bussmann ? for m no. mcr page 2 of 2 bif doc #2003 bussmann r ev . 7/28/97 this bulletin is intended to clearly pr esent compr ehensive pr oduct data and pr ovide technical infor mation that will help the end user with design applications. bussmann r eser ves the right, without notice, to change design or constr uction of any pr oducts and to discontinue or limit distribution of any pr oducts. bussmann also r eser ves the right to change or update, without notice, any technical infor mation contained in this bulletin. once a pr oduct has been selected, it should be tested by the user in all possible applications. r v oltage drop 2 1.8 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% percent of rated current mcr- ? mcr- ? mcr- ? mcr- ? mcr- ?a mcr- ? v oltage drop 0.25 0.2 0.15 0.1 0.05 0 10% 20% 30% 40% 50% 60% 70% 80% 90% 100% percent of rated curent mcr-1 mcr-1 ?a mcr-2 mcr-2 ?a mcr-3 mcr-3 ?a mcr-5 mcr-10 mcr-4 mcr-7 t ypical v oltage dr op (at 25 c ambient t emperatur e) body high temperatur e ther moplastic, flammability rating ul 94 vo. electrical characteristics car r y 100% rated cur r ent for 4 hours minimum. open at 250% of rated cur r ent in 5 seconds maximum. element solid matrix, gold or silver element encapsulated in ceramic. leads t in-plated copper , .64mm (.025 ) diameter . lead bend t est w ith a two pound weight attached, 90 one dir ection, back to original position, then 90 opposite dir ection; fuse will withstand two cycles. life t est 2000 hours at 80% rated cur r ent, 55 c. moistur e resistance mil-std-202, method 106, 90% r elative humidity at 65 c. operating t emperatur e -55 c to 125 c with pr oper fuse derating. packaging eia-std-296-e. resistance to mil-std-202, method 210, t est soldering heat condition c (260 c). salt spray mil-std-202, method 101, t est condition b. shock mil-std-202, method 213, t est condition i, 100g s for 6 milliseconds. solderability mil-std-202, method 208. t er minal str ength mil-std-202, method 211, t est condition a, will withstand 7 lb. axial pull test. ther mal shock mil-std-202, method 107, t est condition b, -65 c to 125 c. ther mal cycle eia-std-rs-186-c, t est condition a, -55 c to 85 c. v ibration mil-std-202, method 204, t est condition c, (55 to 2000 hz, 10g s peak). w ave soldering maximum r eser voir temperatur e 260 c, 10 second maximum exposur e, .125" fr om body . micr otr on fuses ar e designed to meet the following specifications:
|
