WSLS2512, Improved Stability
Improved Stability (0.25 % and 0.5 %),
Vishay Dale
Power Metal Strip® Resistors
Low Value (0.01 Ω to 0.1 Ω), Surface Mount
DIMENSIONS
DIMENSIONS in inches [millimeters]
MODEL
L
W
H
T
H
0.250 0.010 0.125 0.010 0.025 0.010 0.030 0.010
[6.35 0.254] [3.18 0.254] [0.635 0.254] [0.ꢀ62 0.254]
WSLS2512
W
T
L
SOLDER PAD DIMENSIONS in inches [millimeters]
MODEL
l
b
a
b
l
0.065
[1.65]
0.145
[3.68]
0.160
[4.06]
WSLS2512
a
120
100
80
60
40
20
0
- 65 - 50
- 25
0
25
50
ꢀ5
100
125
150
1ꢀ0
70
Ambient Temperature in °C
Derating
PERFORMANCE
TEST LIMITS
0.25 % 0.5 %
TEST
CONDITIONS OF TEST
Thermal Shock
- 55 °C to + 150 °C, 1000 cycles, 15 min at each extreme
5 x rated power for 5 s for WSL2512 size or smaller
- 65 °C for 45 min
(0.5 % + 0.005 Ω) ΔR
(0.5 % + 0.005 Ω) ΔR
(0.5 % + 0.005 Ω) ΔR
(1.0 % + 0.005 Ω) ΔR
(0.5 % + 0.005 Ω) ΔR
(0.5 % + 0.005 Ω) ΔR
(0.5 % + 0.005 Ω) ΔR
Short Time Overload
Low Temperature Operation
High Temperature Exposure
Bias Humidity
1000 h at + 1ꢀ0 °C
+ 85 °C, 85 % RH, 10 % Bias, 1000 h
Mechanical Shock
Vibration
100 g’s for 6 ms, 5 pulses
Frequency varied 10 to 2000 Hz in 1 min, 3 directions, 12 h
2000 h at ꢀ0 °C, 1.5 h “ON”, 0.5 h “OFF”
+ 260 °C Solder, 10 to 12 s dwell, 25 mm/s emergence
MIL-STD-202, Method 106, 0 % power, ꢀb not required
Load Life
0.25 % ΔR
0.5 % ΔR
Resistance to Solder Heat
Moisture Resistance
(0.5 % + 0.005 Ω) ΔR
(0.5 % + 0.005 Ω) ΔR
PACKAGING
MODEL
REEL
TAPE WIDTH
12 mm/Embossed Plastic
DIAMETER
PIECES/REEL
CODE
WSLS2512
1ꢀ8 mm/ꢀ"
2000
EA
Note
• Embossed Carrier Tape per EIA-481-2
Document Number: 30123
Revision: 06-Oct-08
For technical questions, contact: ww2bresistors@vishay.com
www.vishay.com
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