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| WSK Vishay Dale Power Metal Strip(R) Resistors, Low Value, Surface Mount, 4 - Terminal FEATURES * 4-Terminal design allows for 1% tolerance down to 0.001 and 0.5% tolerance down to 0.003 * Ideal for all types of precision current sensing, voltage division and pulse applications including switching and linear power supplies, instruments, power amplifiers * Proprietary processing technique produces extremely low resistance values * All welded construction * Solid metal Nickel-Chrome or Manganese-Copper alloy resistive element * Solderable terminations * Very low inductance 0.5H to 5H * Excellent frequency response STANDARD ELECTRICAL SPECIFICATIONS MODEL POWER RATING P70C W 0.5% WSK2512 1.0 0.003 - 0.025 RESISTANCE RANGE 1.0% 0.001 - 0.025 * Part Marking: DALE, Value, Tolerance; due to resistor size limitations some resistance values will be marked with only the resistance value. TECHNICAL SPECIFICATIONS PARAMETER Temperature Coefficient UNIT ppm/C WSK2512 0.001 - 0.0029 = 250 0.003 - 0.0049 = 75 0.005 - 0.025 = 35 - 65 / + 170 (P x R)1/2 63.6 Operating temperature range Maximum Working Voltage Weight/1000 pieces C V g ORDERING INFORMATION WSK2512 MODEL 0.001 RESISTANCE 1% TOLERANCE % R86 PACKAGING B43 = Bulk Pack R86 = Tape and Reel www.vishay.com 100 For technical questions, contact ww2bresistors@vishay.com Document Number: 30108 Revision 06-Sep-02 WSK Power Metal Strip(R) Resistors, Low Value, Surface Mount, 4 - Terminal DIMENSIONS L W H Vishay Dale B A T b I d c e a MODEL RESISTANCE RANGE 0.001 - 0.0049 WSK2512 0.005 - 0.025 L 0.250 0.010 [6.35 0.254] 0.250 0.010 [6.35 0.254] W DIMENSIONS in inches [millimeters] H 0.025 0.010 [0.635 0.254] 0.025 0.010 [0.635 0.254] T 0.087 0.010 [2.21 0.254] 0.047 0.010 [1.19 0.254] A 0.030 0.010 [0.762 0.254] 0.030 0.010 [0.762 0.254] B 0.020 0.010 [0.508 0.254] 0.020 0.010 [0.508 0.254] 0.125 0.010 [3.18 0.254] 0.125 0.010 [3.18 0.254] MODEL a WSK2512 0.125 [3.18] RATED POWER IN % SOLDER PAD DIMENSIONS in inches [millimeters] b 0.130 [3.30] 120 100 80 60 40 20 0 -65 -55 -25 0 25 50 75 100 125 150 170 70 AMBIENT TEMPERATURE C c 0.030 [0.76] d 0.020 [0.51] e 0.055 [1.40] I 0.065 [1.65] DERATING PERFORMANCE TEST Thermal Shock Short Time Overload Low Temperature Storage High Temperature Exposure Bias Humidity Mechanical Shock Vibration Load Life Resistance to Solder Heat Moisture Resistance CONDITIONS OF TEST - 55C to + 150C, 1000 cycles, 15 minutes at each extreme 5 x power for 5 seconds - 65C for 24 hours 1000 hours at + 170C + 85C, 85% RH, 10% Bias, 1000 hours 100g's for 6 milliseconds, 5 pulses Frequency varied 10 to 2,000Hz in one minute, 3 directions, 12 hours 1,000 hours @ rated power, + 70C, 1.5 hours "ON", 0.5 hours "OFF" + 260C Solder, 10 - 12 second dwell, 25mm/second emergence MIL-STD-202 Method 106, 0% power, 7a and 7b not required TEST LIMITS (0.5% + 0.0005)R (0.5% + 0.0005)R (0.5% + 0.0005)R (1.0% + 0.0005)R (0.5% + 0.0005)R (0.5% + 0.0005)R (0.5% + 0.0005)R (1.0% + 0.0005)R (0.5% + 0.0005)R (0.5% + 0.0005)R PACKAGING MODEL TAPE WIDTH WSK2512 12mm/Embossed Plastic Embossed carrier tape per EIA-481-1A DIAMETER 178mm/7" REEL PIECES/REEL 2000 CODE R86 Document Number: 30108 Revision 06-Sep-02 For technical questions, contact ww2bresistors@vishay.com www.vishay.com 101 |
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