www.vishay.com 31 RCMA vishay sfernice document number: 52009 revision 25- j ul-02 for technical questions, contact sfer@vishay.com vishay sfernice series nf c 83-230 cecc 40 100-803 power rating at 70c 0.2% 0.5% 1% 0.1% 0.2% 0.5% 1% 0.1% 0.2% 0.5% 1% resistance value range in relation to ? tolerance ? temperature coefficient maximum voltage critical resistance temperature coefficient rated in the range ? 55 c/+ 155 c typical in the range 0 c/+ 155 c insulation resistance voltage coefficient environmental specifications k3 50ppm/c k4 25ppm/c k5 15ppm/c > 10 7 m ? 0.0001% volt ? 65 c/+ 155 c/56 days RCMA 02 be 0.125w 10 ? 332k ? 1 ? 1m ? 10 ? 332k ? 1 ? 1m ? 10 ? 332k ? 10 ? 1m ? 300v 720k ? k4 rs58p RCMA 05 ce 0.250w 10 ? 332k ? 1 ? 1m ? 10 ? 332k ? 1 ? 1m ? 10 ? 332k ? 10 ? 1m ? 350v 490k ? k4 rs63p RCMA 08 de 0.500w 10 ? 1m ? 1 ? 1.5m ? 10 ? 1m ? 1 ? 1.5m ? 10 ? 750k ? 10 ? 1.5m ? 400v 320k ? rs68p RCMA 1 ? 0.75w 10 ? 1m ? 1 ? 2m ? 10 ? 1m ? 1 ? 2m ? 10 ? 750k ? 10 ? 2m ? 500v 333k ? ? RCMA 2 ? 1w 10 ? 1m ? 1 ? 2.5m ? 10 ? 1m ? 1 ? 2.5m ? 10 ? 1m ? 10 ? 2.5m ? ? 2w 10 ? 2.5m ? 1 ? 5m ? 10 ? 2.5m ? 1 ? 5m ? 10 ? 2m ? 10 ? 2.5m ? 600v 360k ? ? RCMA 4 800v 320k ? ? k3 k4 k5 undergoes european quality insurance system (cecc) features 0.1w to 2w at 70 c nf c 83-230 cecc 40 100 very high stability: drift < 0.1% after 1000 hours reduced total excursion: high initial precision (to ?0.1%) with low temperature coef cient (down to ?15ppm/?) high reliability these models of this series have been the rst ones qual i ed by the cnes for spatial applications (certi cate n? dated october 22, 1972) wide range ohmic values 1 ? to 5m ? ? accurate dimensions, high insulation and great mechanical strength high climatic performances: 65 c/+ 155 c/56 days matching tolerance: 0.1% tracking t.c.: 5ppm/ c molded metal film very high stability and precision resistors dimensions in millimeters series dimen- sions RCMA 02 6.7 2.5 0.6 0.26 RCMA 05 10.4 3.66 0.6 0.46 RCMA 08 16.5 6.4 0.8 1.3 RCMA 1 19.3 6.4 0.8 1.5 RCMA 2 29 10.2 0.8 4.4 RCMA 4 54 10.2 0.8 13 a max. b max. c unit weight in g technical specifications 25 min. 25 min. a c b
document number: 52009 revision 25- j ul-02 www.vishay.com 32 RCMA vishay sfernice for technical questions, contact sfer@vishay.com tables 2 and 3 show the basic characteristics and max. values under different stresses. in fact, the values and drifts are maintained to within narrower limits. practical operating tolerances temperature coefficient between ? 10 c and + 70 c long life 90 /30 cycles ambient temperature 70 c k5 10ppm/ c k4 15ppm/ c 1000 hours at pr 10.000 hours at pr 0.05% 0.15% so, in operation under the speci ed conditions (pr at 70 c) the total drift (load life + t.c.) of a RCMA k4 does not exceed 0.25%. special applications temperature coef cient tracking to 5ppm/ c. tolerance matching to 0.05%. selection of positive or negative t.c. in temperature range of 20 c to + 125 c. for these applications and other requirements consult vishay sfernice. ambient temperature in degrees celsius % rated power 100 50 0 0 30 50 70 100 125 150 power rating chart temperature rise rated power in watt hot spot temperature in c 40 30 20 10 0 0 0.5 1 1.50 2 RCMA 1 RCMA2 RCMA4 tests nf c 83-230 - cecc 40 100 load life at max. category temperature short time overload damp heat humidity (steady state) rapid temperature change climatic sequence terminal strength vibration soldering (thermal shock) load life shelf life 1000 h at 125 c 50% of pn 1% insulation resist. >1g ? (0.25% + 0.05 ? ) (1% + 0.05 ? ) insulation resist. >1g ? (0.25% + 0.05 ? ) (0.25% + 0.05 ? ) (0.25% + 0.05 ? ) (0,25% + 0.05 ? ) (1% + 0.05 ? ) insulation resist. > 1g ? (1% + 0.05 ? ) insulation resist. >1g ? 0.25% or 0.05 ? 0.1% or 0.05 ? 0.2% or 0.05 ? 0.1% or 0.05 ? 0.05% or 0.05 ? 0.05% or 0.05 ? 0.05% or 0.05 ? 0.1% or 0.05 ? 0.1% or 0.05 ? 0.25% or 0.05 ? insulation resist. 106m ? 2.5 um/5 s limited to 2 un 56 days with low load 55 c + 155 c 65 c + 155 c pull - twist - 2 bends 10 to 500hz + 260 c 10 s cycle 90 /30 1000 h at pn at 70 c 1 year ambient temperature conditions std 202 requirements typical values and drifts performance molded metal film very high stability and precision resistors
www.vishay.com 33 RCMA vishay sfernice document number: 52009 revision 25- j ul-02 for technical questions, contact sfer@vishay.com molded metal film very high stability and precision resistors 02 special design style series RCMA tolerance 0.1% ohmic value 100k ? ordering information method n optional packaging ammo-pack: tape in a box or tape and reel temperature coefficient k5 marking printed: sfernice trademark, series, style (due to lack of space RCMA 02 is printed ma 02), ohmic value (in ? ), tolerance (in %), temperature coef cient, manufacturing date. ammo-pack
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