document number: 52012 revision 16- j ul-02 www.vishay.com 40 RCMY vishay sfernice for technical questions, contact sfer@vishay.com the RCMY 2 and RCMY 4 resistors are particularly well suited for high voltage applications. the technology used ensures very good stability under the most severe and diverse operating conditions. due to their excellent performance, the RCMY2 and RCMY4 sfernice series and styles power rating at 70c (pr) re sistance tolerance maximum voltage resistance value range temperature coefficient insulation resistance (typical) critical resistance 0.5w 1m ? to 100m ? 1% 2% 5% 3kv > 10 7 m ? 18m ? 1m ? to 250m ? 10kv k2 100ppm/c 100m ? RCMY2 1w RCMY4 features 0.5w to 1w at 70 c nf c 93-230 very high ohmic values high insulation accurate dimensions great mechanical strength molded metal film, high ohmic values high voltage resistors dimensions in millimeters dimen- sions series a max. 29 10.2 10.2 54 RCMY2 RCMY4 0.8 0.8 4.4 13 ? b max. ? c 0.1 weight in g 25 min. 25 min. a ? c ? b technical specifications are perfect for the design of high voltage and precision voltage divider networks. with two resistors only, voltage ratios of up to 10 ? 8 can be achieved in a wide range of ohmic values. higher ratios can be obtained with a combination of several resistors.
www.vishay.com 41 RCMY vishay sfernice document number: 52012 revision 16- j ul-02 for technical questions, contact sfer@vishay.com practical tolerance for use after 1000 hours load life at rated power 90 ? /30 ? cycles +70 c ambient temperature, the typical drifts, measured at 70 c, are as follows : typical total drift = drift due to t.c. (k2) + life drift :< 0.8%. maximum deviation from rated ohmic value including 1% manufacturing tolerance 1.8%. power rating chart temperature rise ambient temperature in degrees celsius power in watt 1 0.5 0 0 30 50 70 90 100 110 125 150 RCMY2 RCMY4 rated power in watt hot spot temperature in c 60 40 20 0 0 0.25 0.5 0.75 1 RCMY 2 RCMY4 molded metal film, high ohmic values high voltage resistors tests nf c 93-230 load life at max. category temperature short time overload dielectric voltage damp heat humidity (steady state) rapid temperature change climatic sequence terminal strength vibration soldering (thermal shock) load life shelf life 4.5kv rms 1000 h at 125 c 0% of pn 0.5% 2% 1.5% insulation resist. >10 3 m ? 0.5% 0.5% 0.5% 0.5% 1% ? 0.5% 1% insulation resist. >10 3 m ? 0.1% < 0.1% 0.5 % 0.5% insulation resist. >10 7 m ? 0.1% 0.05% 0.05% 0.1% 0.3% < 0.2% per year 0.5% insulation resist. >10 7 m ? 2.5 um / 5 s limited to 2 un 56 days with low load ? 55 c + 125 c ? 55 c + 125 c severity 1 pull - twist - 2 bends severity 55 b + 260 c 10 s cycle 90 ? /30 ? 1000 h at pn at 70 c 1 year @ ambient temperature conditions requirements typical values and drifts performance noise in a frequency decade, the average noise level is 0.2 v/v and can reach 0.5 v/v for the highest values. v oltage coefficient < 1 ppm/v.
document number: 52012 revision 16- j ul-02 www.vishay.com 42 RCMY vishay sfernice for technical questions, contact sfer@vishay.com marking printed: sfernice trademark, series, style , ohmic value (in m ? ), tolerance (in %), manufacturing date. molded metal film, high ohmic values high voltage resistors in box. packaging 2 special design style series RCMY tolerance 2% ohmic value 80m ? ordering information method n optional packaging optional
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