d a t a sh eet maintenance types (not for new designs) file under bccomponents, bc08 2000 sep 06 bccomponents mrs16; mrs25 professional leaded resistors
2000 sep 06 2 bccomponents maintenance types (not for new designs) professional leaded resistors mrs16; mrs25 features ? professional resistors in small outlines ? low noise. applications ? all general purpose applications. description a homogeneous film of metal alloy is deposited on a high grade ceramic body. after a helical groove has been cut in the resistive layer, tinned connecting wires of electrolytic copper are welded to the end-caps. the resistors are coated with lacquer which provides electrical, mechanical, and climatic protection. four or five colour code rings designate the resistance value and tolerance according to iec 60 062 . suitable replacements for mrs16 and mrs25 are the mba 0204 and mbb 0207 professional. quick reference data description value mrs16 mrs25 resistance range 4,99 ? to 1 m ? 1 ? to 10 m ? resistance tolerance and series 1%; e24/e96 series maximum dissipation at t amb =70 c 0,4 w 0,6 w thermal resistance ( r th ) 170 k/w 150 k/w temperature coefficient 50 ppm/k maximum permissible voltage (dc or rms) 200 v 350 v basic specifications iec 60115-1 and 60115-2 climatic category (iec 60068) 55/155/56 max. resistance change for resistance range, ? r / r max., after: load: r 100 k ? (0,5% + 0,05 ?) (0,5% + 0,05 ?) r > 100 k ? (1% + 0,05 ?) (0,5% + 0,05 ?) climatic tests: r 100 k ? (0,5% + 0,05 ?) ( 0,5% + 0,05 ?) r > 100 k ? (1% + 0,05 ?) (0,5% + 0,05 ?) soldering: r 100 k ? (0,1% + 0,05 ?) ( 0,1% + 0,05 ?) r > 100 k ? (0,25% + 0,05 ?) ( 0,1% + 0,05 ?) short time overload (0,25% + 0,05 ?) ( 0,25% + 0,05 ? )
2000 sep 06 3 bccomponents maintenance types (not for new designs) professional leaded resistors mrs16; mrs25 ordering information numeric ordering code (12nc) ? the resistors have a 12-digit ordering code starting with 2322 15. ? the subsequent 2 digits indicate the resistor type and packaging; see table 1. ? the remaining 4 digits indicate the resistance value: ? the first 3 digits indicate the resistance value. ? the last digit indicates the resistance decade in accordance with table 2. table 1 ordering code indicating resistor type and packaging ty p e ordering code 2322 15. ..... bandolier in ammopack bandolier on reel 1000 units 5000 units 5000 units mrs16 7 1.... 7 2.... 7 3.... mrs25 6 1.... 6 2.... 6 3.... table 2 last digit of 12nc indicating resistance decade resistance decade last digit 1to9,76 ? 8 10 to 97,6 ? 9 100 to 976 ? 1 1to9,76k ? 2 10 to 97,6 k ? 3 100 to 976 k ? 4 1to9,76m ? 5 10 m ? 6 o rdering example the ordering code of a mrs16 resistor, value 750 ? , on a bandolier of 1000 units in ammopack is: 2322 157 17501.
2000 sep 06 4 bccomponents maintenance types (not for new designs) professional leaded resistors mrs16; mrs25 mechanical data outlines table 3 leaded resistor types, mass and relevant physical dimensions; see fig.2 note 1. due to the various sources of production, delivery of specific versions (a or b) of mrs 16 cannot be guaranteed. ty p e ve r s i o n d max (mm) l max (mm) d nom (mm) m min (mm) mass (mg) mrs 16 a 1.6 3.6 0.5 5.0 125 b 1.9 3.4 0.5 5.0 125 mrs 25 ? 2.5 6.5 0.6 10.0 700 for dimensions see table 3. fig.2 outline. l d d m
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