WSC, WSN Vishay Dale Wirewound Resistors, Precision Power, Surface Mount FEATURES * All welded construction * Molded encapsulation * Wrap around terminations * SnPb electro tin plated terminations * Excellent stability at different environmental conditions * High power ratings * Superior surge capability * Available in non-inductive styles with Aryton-Perry winding (WSN in lieu of WSC, maximum resistance is one-half WSC range) STANDARD ELECTRICAL SPECIFICATIONS MODEL SIZE TOLERANCE INCH POWER RATING P70C W RESISTANCE RANGE ENCAPSULATION WSC-1/2 2012 0.5 0.5, 1, 5 0.1 - 4.99 Epoxy WSC-1 2515 1.0 0.5, 1, 5 0.1 - 2.77k Epoxy WSC2515 2515 1.0 0.5, 1, 5 0.1 - 2.77k Thermoplastic WSC-2 4527 2.0 0.5, 1, 5 0.1 - 4.92k Epoxy WSC4527 4527 2.0 0.5, 1, 5 0.1 - 4.92k Thermoplastic WSC6927 6927 3.0 0.5, 1, 5 0.1 - 8k Thermoplastic % * Part Marking: 1/2W - DALE, Value; 1W - Model, Value, Tolerance, Date Code; 2W & 3W - DALE, Model, Value, Tolerance, Date Code. TECHNICAL SPECIFICATIONS PARAMETER UNIT WSC-1/2 ppm/C 0.1 - 0.99 = 90 1.0 - 4.99 = 50 Dielectric Withstanding Voltage VAC > 500 > 500 > 500 > 500 > 500 Insulation Resistance > 109 > 109 > 109 > 109 > 109 Operating Temperature Range C - 65/ + 175 - 65/ + 175 - 65/ + 275 - 65/ + 175 - 65/ + 275 Maximum Working Voltage V (P x R)1/2 (P x R)1/2 (P x R)1/2 (P x R)1/2 (P x R)1/2 Weight/1000 pieces (typical) g 90 165 165 760 760 / 1675 Temperature Coefficient WSC-1 WSC2515 WSC-2 WSC4527/WSC6927 0.1 - 0.99 = 90 0.1 - 0.99 = 90 0.1 - 0.99 = 90 1.0 - 26.5 = 50 1.0 - 26.5 = 50 1.0 - 9.9 = 50 26.51 and above = 20 26.51 and above = 20 10.0 and above = 20 0.1 - 0.3 = 150 0.31 - 0.99 = 90 1.0 - 9.9 = 50 10 and above = 20 ORDERING INFORMATION WSC2515 10 1.0% R86 MODEL RESISTANCE TOLERANCE % PACKAGING B43 = Bulk Pack R86 = Tape and Reel www.vishay.com 106 For technical questions, contact ww2aresistors@vishay.com Document Number 30102 Revision 06-Sep-01 WSC, WSN Vishay Dale Wirewound Resistors, Precision Power, Surface Mount DIMENSIONS MODEL DIMENSIONS in inches [millimeters] L W b l 0.110 0.015 [2.79 0.381] 0.045 0.010 [1.14 0.254] 0.150 0.005 [3.81 0.127] 0.098 0.005 [2.49 0.127] WSC2515 0.250 0.020 [6.35 0.508] 0.110 0.015 [2.79 0.381] 0.045 0.010 [1.14 0.254] 0.150 0.005 [3.81 0.127] 0.098 0 .005 [2.49 0.127] WSC-2 0.445 0.032 [11.30 0.813] 0.162 0.015 [4.11 0.381] 0.100 0.010 [2.54 0.254] 0.275 0.005 [6.98 0.127] 0.215 0.005 [5.46 0.127] WSC4527 0.455 0.020 [11.56 0.508] 0.167 0.010 [4.24 0.254] 0.100 0.010 [2.54 0.254] 0.275 0.005 [6.98 0.127] 0.215 0.005 [5.46 0.127] WSC6927 0.690 0.032 [17.53 0.813] 0.280 0.015 [7.11 0.381] 0.100 0.010 [2.54 0.254] 0.275 0.005 [6.98 0.127] 0.215 0.015 [5.46 0.381] SOLDER PAD DIMENSIONS in inches [millimeters] a b l 0.085 [2.16] 0.070 [1.78] 0.080 [2.03] 0.090 [2.29] 0.115 [2.92] 0.120 [3.05] 0.090 [2.29] 0.115 [2.92] 0.120 [3.05] 0.155 [3.94] 0.230 [5.84] 0.205 [5.21] 0.155 [3.94] 0.230 [5.84] 0.205 [5.21] 0.155 [3.94] 0.235 [5.97] 0.470 [11.94] 200 Rated Power in % WSC-1/2 WSC-1 WSC2515 WSC-2 WSC4527 WSC6927 Temperature Rise in C W1 0.250 0.020 [6.35 0.508] MODEL a W WSC-1 T L T 0.200 0.020 0.096 0.015 0.040 0.010 0.125 0.005 0.050 0.010 [5.08 0.508] [2.44 0.381] [1.02 0.254] [3.18 0.127] [1.27 0.254] H W1 H WSC-1/2 120 WSC-2 WSC4527 150 WSC-1/2 100 WSC6927 WSC-1 WSC2515 100 80 WSC2515 WSC4527 WSC6927 60 40 50 WSC-1/2 WSC-1 WSC-2 20 0 0 0.5 1.0 1.5 2.0 2.5 Temperature Rise 0 3.0 Power in W -65 -25 25 75 70 Derating 125 175 225 275 Ambient Temperature in C PERFORMANCE TEST CONDITIONS OF TEST Thermal Shock Short Time Overload Low Temperature Storage High Temperature Exposure Bias Humidity Mechanical Shock Vibration Load Life Resistance to Solder Heat - 55C to + 150C, 1000 cycles, 15 minutes at each extreme 5 x rated power for 5 seconds - 65C for 24 hours 1000 hours at + 275C (+ 175C for WSC-1/2, WSC-1 and WSC-2) + 85C, 85% RH, 10% Bias, 1000 hours 100g's for 11 milliseconds, 5 pulses Frequency varied 10 to 500Hz in one minute, 3 directions, 9 hours 1000 hours at rated power, + 70C, 1.5 hours "ON", 0.5 hours "OFF" + 260C Solder, 10 -12 second dwell, 25mm/second emergence TEST LIMITS (0.5% + 0.05) R (0.2% + 0.05) R (0.2% + 0.05) R (0.5% + 0.05) R (0.2% + 0.05) R (0.1% + 0.05) R (0.1% + 0.05) R (1.0% + 0.05) R (0.5% + 0.05) R PACKAGING MODEL REEL TAPE WIDTH DIAMETER PIECES/REEL CODE WSC-1/2 12mm/Embossed Plastic 330mm/13" 2000 R86 WSC-1/WSC2515 16mm/Embossed Plastic 330mm/13" 2000 R86 WSC-2/WSC4527 24mm/Embossed Plastic 330mm/13" 1200 R86 WSC6927 32mm/Embossed Plastic 330mm/13" 725 R86 Embossed Carrier Tape per EIA-481-1, 2, 3 Document Number 30102 Revision 06-Sep-01 For technical questions, contact ww2aresistors@vishay.com www.vishay.com 107