high ohmic/high voltage resistors www.vishay.com for technical questions contact: ff3dresistors@vishay.com document number: 28732 168 revision: 06-dec-05 vr25 vishay bccomponents features ? high pulse loading capability ? small size ? lead (pb)-free solder contacts ? pure tin plating provides compatibility with lead (pb)-free and lead containing soldering processes ? compatible with "restriction of the use of hazardous substances" (rohs) directive 2002/95/ec (issue 2004) applications ? where high resistance, high st ability and high reliability at high voltage are required ? high humidity environment ? white goods ? power supplies a metal glazed film is deposited on a high grade ceramic body. after a helical groove has been cut in the resistive layer, tinned electrolytic copper wires are welded to the end-caps. the resistors are coated with a light blue lacquer which provides electrical, mechanical, and climatic protection. the encapsulation is resistant to all cleaning solvents in accordance with ?mil-std 202e, method 215? and ?iec 60068-2-45?. note 1. ohmic values (other than resist ance range) are available on request. technical specifications description value resistance range 1) 100 k ? to 22 m ? resistance tolerance and series: 100 k ? to 15 m ? 1 %: e24/e96 series; 5 %: e24 series 15 m ? to 22 m ? 5 %: e24 series; 10 %: e12 series maximum dissipation at t amb =70 c 0.25 w thermal resistance, r th 140 k/w temperature coefficient 200 10 -6 /k maximum permissible voltage: dc 1600 v rms 1150 v dielectric withstanding voltage of the insulation for 1 minute 700 v basic specifications iec 60115-1b climatic category (iec 60068) 55/155/56 stability after: load (1000 hours) ? r/r max.: 1.5 % + 0.1 ? accelerated damp heat test (6 days) ? r/r max.: 1.5 % + 0.1 ? long term damp heat test (56 days) ? r/r max.: 1.5 % + 0.1 ? noise max. 5 v/v 12nc information ? the resistors have a 12-digit numeric code starting with 2322 241 ? the subsequent: first digit for 1 % tolerance products (e24 and e96 series) or 2 digits for 5 % (e24 series) and 10 % (e12 series) indicate the resistor type and packing. ? the remaining digits indicate the resistance value: ? the first 3 digits for 1 % or 2 digits for 5 and 10 % tolerance products indicate the resistance value. ? the last digit indicates the resistance decade. last digit of 12nc indicating resistance decade 12nc example the 12nc for a vr25, resistor value 7.5 m ? , 5 % tolerance, supplied on a bandolier of 1000 units in ammopack, is: 2322 241 13755. resistance decade last digit 100 to 976 k ? 4 1to9.76m ? 5 10 m ? 6
document number: 28732 for technical ques tions contact: ff3dr esistors@vishay.com www.vishay.com revision: 06-dec-05 169 vr25 high ohmic/high vo ltage resistors vishay bccomponents 12nc - resistor type and packing type tol. (%) ordering code 2322 241 ..... bandolier in ammopack bandolier on reel radial taped straight leads 4000 units 52 mm 26 mm 52 mm 52 mm 1000 units 2000 units 5000 units 5000 units vr25 1 0.... 8.... - 7.... 6.... 5 36... 13... 43... 53... 23... 10 - 12... 42... 52... 22... note products can be ordererd using either the 12nc or the part number . the part number is shown to facilitate the introduction of a unified part numbering system. currently, this part number is applicable in the americas only. part number part number: vr25000001503ja100 model/size special character tc/material value tolerance pac k i n g 1) special vr25000 0 = neutral z = value overflow (special) 0 = standard 3 digit value 1 digit multiplier multiplier: 3 = *10 3 4 = *10 4 5 = *10 5 f = 1 % j = 5 % k = 10 % a5 a2 a1 r5 n4 the 2 digits are used for all special parts. 00 = standard product description: vr25 5 % a1 150k vr25 5 % a1 150k model/size tolerance packing 1) resistance value vr25 1 % 5 % 10 % a1 a5 47k = 47 k ? 50r1 = 50.1 ? 1) please refer to table packing. packing code pieces description model/size a5 5000 bandolier in ammopack straight leads 52 mm vr25 a2 2000 bandolier in ammopack straight leads 26 mm a1 1000 bandolier in ammopack straight leads 52 mm r5 5000 bandolier on reel straight leads 52 mm n4 4000 bandolier in ammopack radial taped 50 2 r v00001503ja100
www.vishay.com for technical questions contact: ff3dresistors@vishay.com document number: 28732 170 revision: 06-dec-05 vr25 vishay bccomponents high ohmic/high vo ltage resistors dimensions marking the nominal resistance and tolerance are marked on the resistor using four or five colored bands in accordance with iec publication 60062 ?color codes for fixed resistors? . yellow and grey are used instead of gold and silver because metal particles in the lacquer could affect high-voltage properties. outlines the length of the body (l 1 ) is measured by inserting the leads into holes of two identical gauge plates and moving these plates parallel to each other until the resistor body is clamped without deformation (?iec publication 60294?) . ? d l 1 l 2 ? d outline dimensions - resistor type and relevant physical dimensions type ? d max. l 1 max. l 2 max. ? d vr25 2.5 6.5 7.5 0.58 0.05 mass per 100 units type mass (g) vr25 52 mm 21.2 vr25 26 mm 14.8 functional performance product characterization standard values of nominal resistance are taken from t he e96/e24/e12 series for resistors with a tolerance of 1 %, 5 % or 10 %. the values of the e96/e24/e12 series are in accordance with ?iec publication 60063?. note 1. the maximum voltage that may be continu ously applied to the resistor element, see ?iec publication 60115-1? . the maximum permissible hot-spot temperature is 155 c. limiting values type limiting voltage 1) (v) limiting power (w) dc rms vr25 1600 1150 0.25
document number: 28732 for technical ques tions contact: ff3dr esistors@vishay.com www.vishay.com revision: 06-dec-05 171 vr25 high ohmic/high vo ltage resistors vishay bccomponents derating pulse loading capability 70 100 50 0 0 50 100 155 - 55 t amb ( c) p max ( % p rated ) maximum dissipation (p max ) in percentage of rated power as a function of the ambient temperature (t amb ) the power that the resistor c an dissipate depends on the operating temperature. 4 6 8 10 10 2 20 10 -2 10 1 r n (m ? ) v max (kv) ^ 10 -1 maximum allowed peak pulse voltage in accordance with ?iec 60065 chapter 14.1? ; 50 discharges from a 1 nf capacitor charged to ; 12 discharges/minute (drift ? r/r 2 %) v max application information 100 0 0.1 0.3 0 0.2 20 40 60 80 p (w) ? t (k) hot-spot temperature rise ( ? t) as a function of dissipated power 50 0 0.1 0.3 0 0.2 10 20 30 40 p (w) ? t (k) 5 mm 10 mm 15 mm temperature rise ( ? t) at the lead end (solder ing point) as a function of dissipated power at various lead lengths after mounting
www.vishay.com for technical questions contact: ff3dresistors@vishay.com document number: 28732 172 revision: 06-dec-05 vr25 vishay bccomponents high ohmic/high vo ltage resistors tests and requirements essentially all tests are carried out in accordance with the schedule of ?iec publication 60115-1?, category lct/uct/56 (rated temperatur e range: lower category temperature, upper category temperature; damp heat, long term, 56 days). the testing also covers the requirements specified by eia and eiaj. the tests are carried out in accordance with iec publication 60068-2, ?recommended basic climatic and mechanical robustness testing procedure for electronic components? and under standard atmospheric conditions according to ?iec 60068-1?, subclause 5.3. in the test procedures and requirements table the tests and requirements are listed with reference to the relevant clauses of ?iec publications 60115-1 and 60068-2?; a short description of the test proce dure is also given. in some instances deviations from the iec recommendations were necessary for our me thod of specifying. all soldering tests are performed with mildly activated flux. test procedures and requirements iec 60115-1 clause iec 6006 8 -2 test method test procedure requirements 4.16 21 (u) robustness of terminations: 4.16.2 21 (ua1) tensile all samples ? 0.6 mm; load 10 n; 10 s number of failures < 10 10 -6 4.16.3 21 (ub) bending half number of samples ? 0.6 mm; load 5 n; 4 90 number of failures < 10 10 -6 4.16.4 21 (uc) torsion other half of samples 3 360 in opposite directions no damage ? r/r max.: 0.5 % + 0.05 ? 4.17 20 (ta) solderability 2 s; 235 c good tinning; no damage 4.18 20 (tb) resistance to soldering heat thermal shock: 3 s; 350 c; 3 mm from body ? r/r max.: 0.5 % + 0.05 ? 4.19 14 (na) rapid change of temperature 30 minutes at - 55 c and 30 minutes at + 155 c; 5 cycles ? r/r max.: 0.5 % + 0.05 ? 4.20 29 (eb) bump 3 1500 bumps in 3 directions; 40 g no damage ? r/r max.: 0.5 % + 0.05 ? 4.22 6 (fc) vibration frequency 10 to 500 hz; displacement 1.5 mm or acceleration 10 g; 3 directions; total 6 hours (3 2 hours) no damage ? r/r max.: 0.5 % + 0.05 ?
document number: 28732 for technical ques tions contact: ff3dr esistors@vishay.com www.vishay.com revision: 06-dec-05 173 vr25 high ohmic/high vo ltage resistors vishay bccomponents 4.23 climatic sequence: 4.23.2 2 (ba) dry heat 16 hours; 155 c 4.23.3 30 (db) damp heat (accelerated) 1 st cycle 24 hours; 55 c; 90 to 100 % rh 4.23.4 1 (aa) cold 2 hours; - 55 c 4.23.5 13 (m) low air pressure 2 hours; 8.5 kpa; 15 to 35 c 4.23.6 30 (db) damp heat (accelerated) remaining cycles 5 days; 55 c; 95 to 100 % rh r ins min.: 10 3 m ? ? r/r max.: 1.5 % + 0.1 ? 4.24.2 3 (ca) damp heat (steady state) 56 days; 40 c; 90 to 95 % rh; dissipation 0.01 p n ; limiting voltage 100 v (dc) ? r/r max.: 1.5 % + 0.1 ? 4.25.1 endurance 1000 hours at 70 c; p n or v max ? r/r max.: 1.5 % + 0.1 ? 4.8.4 temperature coefficient between - 55 c and + 155 c (tc 10 -6 /k) 200 4.7 voltage proof on insulation 700 v (rms) during 1 minute; v-block method no breakdown 4.12 noise ?iec publication 60195? max. 5 v/v 4.6.1.1 insulation resistance 500 v (dc) during 1 minute; v-block method r ins min.: 10 4 m ? 4.13 short time overload room temperature; dissipation 6.25 p n (voltage not more than 2 limiting voltage); 10 cycles; 5 s on and 45 s off ? r/r max.: 2.0 % + 0.05 ? 4.26 active flammability ?cheese-cloth test? steps of: 5/10/16/25/40 p n (rms) duration 5 minutes no flaming of gauze cylinder other test in accordance with iec 60695 2.2 passive flammability ?needle-flame test? application of test flame for 20 s no ignition of product; no ignition of under-layer; burning time less than 30 s test procedures and requirements iec 60115-1 clause iec 6006 8 -2 test method test procedure requirements
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