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WSL3921 and WSL5931
Vishay Dale
Power Metal Strip(R) Resistors, Low Value, Surface Mount
FEATURES
* Ideal for all types of 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 Iron-chrome or Manganese-copper alloy resistive element * Very low inductance 0.5nH to 5nH * Excellent frequency response * Low thermal EMF
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL MODEL WSL3921 WSL5931 POWER RATING P70C W 3.0 5.0 TOLERANCE % 1.0 & 5.0 1.0 & 5.0 RESISTANCE VALUES AVAILABLE m 0.3, 0.5, 1, 2, 3, 4 0.2, 0.3, 0.5, 1, 2, 3 WEIGHT (TYPICAL) g/1000 pcs 281 398
* Part Marking: no part marking on these parts
TECHNICAL SPECIFICATIONS
PARAMETER Temperature Coefficient Operating Temperature Range Maximum Working Voltage UNIT ppm/C C V WSL RESISTOR CHARACTERISTICS 175 for 0.3m and 0.5m, 75 for 1m to 4m - 65 / + 170 (P x R)1/2
GLOBAL PART NUMBER INFORMATION
Global Part Numbering: WSL3921L5000FEA
W
GLOBAL MODEL WSL3637 WSL5931
S
L
3
9
2
1
L
5
0
0
0
F
E
A
SPECIAL (Dash Number) (up to 2 digits) From 1-99 as applicable
RESISTANCE VALUE L = Milliohm L5000 = 0.0005
TOLERANCE CODE F = 1.0% J = 5.0%
PACKAGING CODE EA = Lead Free, Tape/Reel EK = Lead Free, Bulk
www.vishay.com 206
For technical questions contact: ww2bresistors@vishay.com
Document Number: 30110 Revision: 29-Mar-05
WSL3921 and WSL5931
Power Metal Strip(R) Resistors, Low Value, Surface Mount
DIMENSIONS
MODEL WSL3921
H L D W
Vishay Dale
DIMENSIONS in inches [millimeters] L 0.394 0.010 [10.0 0.254] 0.591 0.010 [15.0 0.254] W 0.205 0.010 [5.20 0.254] 0.305 0.010 [7.75 0.254] H 0.020 [0.5] 0.020 [0.5] T 0.080 0.010 [2.00 0.254] 0.157 0.010 [4.00 0.254]
WSL5931
T
MODEL WSL3921 WSL5931
b
SOLDER PAD DIMENSIONS in inches [millimeters] d 0.106 0.010 [2.70 0.254] 0.205 0.010 [5.20 0.254] b 0.244 0.010 [6.20 0.254] 0.344 0.010 [8.75 0.254] l 0.220 0.005 [5.60 0.13] 0.220 0.005 [5.60 0.13]
I
d
120 100
80
GLOBAL MODEL WSL3921 WSL3921 WSL3921 WSL3921 WSL3921 WSL3921 WSL5931 WSL5931 WSL5931
-25 0 25 50 75 70 100 125 150 175 Ambient Temperature in C
RESISTANCE VALUE m 0.3 0.5 1.0 2.0 3.0 4.0 0.2 0.3 0.5 1.0 2.0 3.0
Rated Power In %
"D" THICKNESS 0.0510 0.0300 0.0150 0.0270 0.0170 0.0130 0.0485 0.0300 0.0180 0.0330 0.0155 0.0105
ELEMENT MATERIAL Mn-Cu Mn-Cu Mn-Cu Fe-Cr Fe-Cr Fe-Cr Mn-Cu Mn-Cu Mn-Cu Fe-Cr Fe-Cr Fe-Cr
60
40 20
0 -65 -50
Derating
WSL5931 WSL5931 WSL5931
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 rated power for 5 seconds - 65C for 45 Min. 1000 hours at + 175C + 85C, 85% RH, 10% Bias, 1000 hours 100g's for 6 milliseconds, 5 pulses Frequency varied 10 to 2000Hz in one minute, 3 directions, 12 hours 1000 hours at + 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 (1.0% + 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 WSL3921 REEL TAPE WIDTH 16mm/Embossed Plastic DIAMETER 330mm/13" 330mm/13" PIECES/REEL 3000 2000 CODE EA EA
WSL5931 16mm/Embossed Plastic Embossed carrier tape per EIA-481-1A.
Document Number: 30110 Revision: 29-Mar-05
For technical questions contact: ww2bresistors@vishay.com
www.vishay.com 207

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