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| RWST Vishay Sfernice Fixed Wirewound High Power Vitreous Resistors Electrical Traction Model FEATURES * * * * "CS" Type 1 Collars The RWST vitreous wirewound high power resistors are known for their excellent reliability which has developed out of the VISHAY SFERNICE experience over several decades in the field of high current applications. Extremely severe conditions of use are encountered in electrical traction including repeated overloads. To withstand such conditions the new RWST model is extremely rugged and is manufactured to a very carefully monitored process using the best materials 95 Watt to 800 Watt at 25C NF C 93-214 RB 25 x 168, RB 30 x 250 Rugged construction for use in severe environmental conditions DIMENSIONS in millimeters STAINLESS STEEL 304 L COLLARS "CS" type STAINLESS STEEL 304 L COLLARS "CS" type OC A A D 23 E OB 26 F D E OB 58 G H 15 F 3 G H 15 J J DIMENSIONS in millimeters RWST STYLE Connections A2 O B max. O C min. D E F 0.5 -4 G -0 H- 4 -0 J 0.5 Average unit weight in g (CS collars) 25 x 138 CS Type 1/B/AN 138 28 12 50 1.5 27 1 24 199 169 6.5 225 25 x 168 CS Type 1/B/AN 168 28 12 50 1 27 1 24 229 199 6.5 250 30 x 250 CS Type 1/B/AN 250 33 17 60 1.5 30 1 25 317 287 9 445 40 x 370 CS Type 2/B/AN 370 45 22 69 max. 45 1.5 30 432 405 9 1400 50 x 373 CS Type 2/B/AN 373 53 27.1 80 max. 51 1.5 30 432 405 9 2200 Document Number: 50017 Revision 13-Jan-04 For technical questions, contact sfer@vishay.com www.vishay.com 61 RWST Vishay Sfernice Fixed Wirewound High Power Vitreous Resistors Electrical Traction Model ELECTRICAL SPECIFICATIONS Resistance Range 2.7 to 430k (E12-E24 preferred series values) MECHANICAL SPECIFICATIONS Mechanical Protection Resistive Element Connections AN Collar or B Average Unit Weight Vitreous enamel Ni-Cr wire CS supporting collars on Request 225 to 2200g Resistance Tolerance Standard Power Rating Temperature Coefficient Shelf Life 5% 95W to 800W at 25C 75ppm/C (typical) 0.1% year (typical) ENVIRONMENTAL SPECIFICATIONS Temperature Limits Climatic Category - 55C + 450C - 55C/+ 200C/56 days PERFORMANCE TESTS Short Time Overload CONDITIONS 10Pr during 5s Voltage limited at < 5000V - 55C + 200C REQUIREMENTS 2% or 0.05 2% or 0.05 Insulation resistance 100M 3% or 0.05 Insulation resistance 100M 2% or 0.05 1% or 0.05 1% or 0.05 1% or 0.05 5% 1000h 5000h TYPICAL VALUES AND DRIFTS 0.5% Climatic Sequence Humidity (Steady State) Thermal Shock Shock Vibration Terminal Strength Load Life AN B 0.5% 56 days 95% relative humidity Load at 100% Pr followed by cold temperature exposure at -55C/15' severity 50A 9 shocks/each side severity 55B Traction 40Ncm Torque 60Ncm 90'/30' cycle 1000h at Pr 25C 0.5% 0.5% 0.25% 0.25% 0.5% 1% 2% SPECIAL FEATURES RWST STYLE Designation NF C 93-214 Power Rating at 25C Maximum Power Rating at 25C Ohmic Range (E12, E24 series) Limiting Element Voltage Critical Resistance P max. 2.7 18k 25 x 138 - 95W 110W 82k 1400V 2.7 25 x 168 RB 25 x 168 160W 180W 100k 1900V 20k 4.7 30 x 250 RB 30 x 250 280W 320W 220k 3000V 30k 8.2 40 x 370 - 500W 600W 360k 4500V 36k 12 50 x 373 - 700W 800W 430k 5000V 30k NON INDUCTIVE WINDING For high frequencies, low self induction resistors are available with special windings. RWSTNI designation. MODEL AND STYLE Ohmic range (E12 series) RWSTNI 25 x 138 22 2.5k RWSTNI 25 x 168 22 4k RWSTNI 30 x 250 120 6.8k RWSTNI 40 x 370 120 8.2k RWSTNI 50 x 373 150 8.2k www.vishay.com 62 For technical questions, contact sfer@vishay.com Document Number: 50017 Revision 13-Jan-04 RWST Fixed Wirewound High Power Vitreous Resistors Electrical Traction Model POWER RATING CHART Vishay Sfernice 100 % RATED POWER 75 50 25 0 0 65 130 195 260 325 390 455 AMBIENT TEMPERATURE IN DEGREES CELSIUS TEMPERATURE RISE 400 HOT SPOT TEMPERATURE IN C 300 200 100 0 10 RATED POWER IN WATTS 100 1000 MARKING SFERNICE trademark, model, style, nominal resistance (in ), tolerance (in %), manufacturing date. ORDERING INFORMATION RWST MODEL 30 x 250 STYLE NI NON-INDUCTIVE BOBINAGE Optional SPECIAL DESIGN Optional CS CONNECTIONS 6.8k OHMIC VALUE 5% TOLERANCE Document Number: 50017 Revision 13-Jan-04 T2 5x 13 RW 8 ST 25 x1 68 RW ST 30 x2 50 RW ST 40 x3 RW 70 ST 50 x3 73 RW S Custom items are subject to extra-charge and min. order. Please see price list. For technical questions, contact sfer@vishay.com www.vishay.com 63 |
Price & Availability of RWST50X373NICS
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