WSC, WSN
Vishay Dale
www.vishay.com
106 Document Number 30102
Revision 06-Sep-01
For technical questions, contact ww2aresistors@vishay.com
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)
Wirewound Resistors,
Precision Power, Surface Mount
ORDERING INFORMATION
WSC2515 10Ω1.0% R86
MODEL RESISTANCE TOLERANCE PACKAGING
Ω± % B43 = Bulk Pack
R86 = Tape and Reel
TECHNICAL SPECIFICATIONS
PARAMETER UNIT WSC-1/2 WSC-1 WSC2515 WSC-2 WSC4527/WSC6927
Temperature ppm/˚C
0.1Ω - 0.99Ω = ± 90 0.1Ω - 0.99Ω = ± 90 0.1Ω - 0.99Ω = ± 90 0.1Ω - 0.99Ω = ± 90 0.1Ω - 0.3Ω = ± 150
Coefficient
1.0Ω - 4.99Ω = ± 50 1.0Ω - 26.5Ω = ± 50 1.0Ω - 26.5Ω = ± 50 1.0Ω - 9.9Ω = ± 50 0.31Ω - 0.99Ω = ± 90
26.51Ω and above = ± 20 26.51Ω and above = ± 20 10.0Ω and above = ± 20 1.0Ω - 9.9Ω = ± 50
10Ω and above = ± 20
Dielectric Withstanding VAC > 500 > 500 > 500 > 500 > 500
Voltage
Insulation Resistance Ω> 109> 109> 109> 109> 109
Operating Temperature °C - 65/ + 175 - 65/ + 175 - 65/ + 275 - 65/ + 175 - 65/ + 275
Range
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
STANDARD ELECTRICAL SPECIFICATIONS
MODEL SIZE POWER RATING TOLERANCE RESISTANCE ENCAPSULATION
P70°CRANGE
INCH W ± % Ω
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.
www.vishay.com
107
WSC, WSN
Vishay Dale
Document Number 30102
Revision 06-Sep-01
For technical questions, contact ww2aresistors@vishay.com
DIMENSIONS
Wirewound Resistors, Precision Power, Surface Mount
W
L
T
W1
H
b
l
aMODEL SOLDER PAD DIMENSIONS in inches [millimeters]
abl
WSC-1/2 0.085 [2.16] 0.070 [1.78] 0.080 [2.03]
WSC-1 0.090 [2.29] 0.115 [2.92] 0.120 [3.05]
WSC2515 0.090 [2.29] 0.115 [2.92] 0.120 [3.05]
WSC-2 0.155 [3.94] 0.230 [5.84] 0.205 [5.21]
WSC4527 0.155 [3.94] 0.230 [5.84] 0.205 [5.21]
WSC6927 0.155 [3.94] 0.235 [5.97] 0.470 [11.94]
PACKAGING
MODEL
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
REEL
MODEL DIMENSIONS in inches [millimeters]
LHTWW
1
WSC-1/2 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]
WSC-1 0.250 ± 0.020 0.110 ± 0.015 0.045 ± 0.010 0.150 ± 0.005 0.098 ± 0.005
[6.35 ± 0.508] [2.79 ± 0.381] [1.14 ± 0.254] [3.81 ± 0.127] [2.49 ± 0.127]
WSC2515 0.250 ± 0.020 0.110 ± 0.015 0.045 ± 0.010 0.150 ± 0.005 0.098 ±0 .005
[6.35 ± 0.508] [2.79 ± 0.381] [1.14 ± 0.254] [3.81 ± 0.127] [2.49 ± 0.127]
WSC-2 0.445 ± 0.032 0.162 ± 0.015 0.100 ± 0.010 0.275 ± 0.005 0.215 ± 0.005
[11.30 ± 0.813] [4.11 ± 0.381] [2.54 ± 0.254] [6.98 ± 0.127] [5.46 ± 0.127]
WSC4527 0.455 ± 0.020 0.167 ± 0.010 0.100 ± 0.010 0.275 ± 0.005 0.215 ± 0.005
[11.56 ± 0.508] [4.24 ± 0.254] [2.54 ± 0.254] [6.98 ± 0.127] [5.46 ± 0.127]
WSC6927 0.690 ± 0.032 0.280 ± 0.015 0.100 ± 0.010 0.275 ± 0.005 0.215 ± 0.015
[17.53 ± 0.813] [7.11 ± 0.381] [2.54 ± 0.254] [6.98 ± 0.127] [5.46 ± 0.381]
Embossed Carrier Tape per EIA-481-1, 2, 3
PERFORMANCE
TEST CONDITIONS OF TEST TEST LIMITS
Thermal Shock - 55°C to + 150°C, 1000 cycles, 15 minutes at each extreme ± (0.5% + 0.05Ω) ∆R
Short Time Overload 5 x rated power for 5 seconds ± (0.2% + 0.05Ω) ∆R
Low Temperature Storage - 65°C for 24 hours ± (0.2% + 0.05Ω) ∆R
High Temperature Exposure 1000 hours at + 275°C (+ 175°C for WSC-1/2, WSC-1 and WSC-2) ± (0.5% + 0.05Ω) ∆R
Bias Humidity + 85°C, 85% RH, 10% Bias, 1000 hours ± (0.2% + 0.05Ω) ∆R
Mechanical Shock 100g’s for 11 milliseconds, 5 pulses ± (0.1% + 0.05Ω) ∆R
Vibration Frequency varied 10 to 500Hz in one minute, 3 directions, 9 hours ± (0.1% + 0.05Ω) ∆R
Load Life
1000 hours at rated power, + 70°C, 1.5 hours “ON”, 0.5 hours “OFF
”± (1.0% + 0.05Ω) ∆R
Resistance to Solder Heat + 260°C Solder, 10 -12 second dwell, 25mm/second emergence ± (0.5% + 0.05Ω) ∆R
Temperature Rise Derating
-65 -25 25 75 125 175 225 275
Rated Power in %
Ambient Temperature in °C
120
100
80
60
40
20
0
0 0.5 1.0 1.5 2.0 2.5 3.0
Temperature Rise in °C
Power in W 70
WSC2515
WSC4527
WSC6927
WSC-1/2
WSC-1
WSC-2
200
150
100
50
0
WSC-1
WSC2515
WSC-1/2 WSC6927
WSC-2
WSC4527
