WSK2512
www.vishay.com
Vishay Dale
Power Metal Strip® Resistors,
Low Value (down to 0.0005 ), Surface Mount, 4-Terminal
FEATURES
• 4-terminal design allows for 1 % tolerance
down to 0.0005 and 0.5 % tolerance down to
0.001
• All welded construction of the Power Metal
Strip® resistors are ideal for all types of current
Available
sensing,
voltage
division,
and
pulse
applications
• Proprietary processing technique produces
extremely low resistance values (down to
Available
0.0005 )
• Sulfur resistance by construction that is
unaffected by high sulfur environments
Available
• Solid
metal
nickel-chrome
or
manganese-copper alloy resistive element with
Available
low TCR (< 20 ppm/°C)
• Very low inductance 0.5 nH to 5 nH
• AEC-Q200 qualified (1)
• Material categorization: for definitions of compliance
please see www.vishay.com/doc?99912
DESIGN SUPPORT TOOLS AVAILABLE
3D 3D
3D Models
Design Tools
Notes
* This datasheet provides information about parts that are RoHS-compliant and / or parts that are non-RoHS-compliant. For example, parts
with lead (Pb) terminations are not RoHS-compliant. Please see the information / tables in this datasheet for details
• Follow link to Overview of Automotive Grade Products for more details: www.vishay.com/doc?49924
(1) Flame retardance test may not be applicable to some resistor technologies
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL
MODEL
SIZE
WSK2512
2512
POWER RATING
P70 °C
W
1.0
RESISTANCE VALUE RANGE
Tol. ± 0.1 %
Tol. ± 0.5 %
Tol. ± 1.0 %
0.01 to 0.2
0.001 to 0.2
0.0005 to 0.2
WEIGHT
(typical)
g/1000 pieces
63.6
Note
• Part marking: Value, tolerance; due to resistor size limitations some resistance values will be marked with only the resistance value
TECHNICAL SPECIFICATIONS
PARAMETER
UNIT
Temperature coefficient
RESISTOR CHARACTERISTICS
± 350 for 0.5 m to 0.99 m,
± 250 for 0.001 to 0.0029 ,
± 75 for 0.003 to 0.0049 ,
± 35 for 0.005 to 0.2
-65 to +170
(P x R)1/2
ppm/°C
Operating temperature range
Maximum working voltage
°C
V
GLOBAL PART NUMBER INFORMATION
Global Part Numbering example: WSK25125L000FTA (visit www.vishay.net Vishay Dale parts numbering manual for all options)
W
S
K
2
5
1
2
5
L
0
0
0
F
T
A
GLOBAL MODEL
RESISTANCE VALUE (1)
TOLERANCE CODE
PACKAGING CODE (2)
SPECIAL
WSK2512
L = m*
R = decimal
5L000 = 0.005
R0100 = 0.01
B = ± 0.1 %
D = ± 0.5 %
F = ± 1.0 %
EA = lead (Pb)-free, tape / reel
EK = lead (Pb)-free, bulk
(dash number)
(up to 2 digits)
From 1 to 99 as
applicable
TA = tin / lead, tape / reel (R86)
BA = tin / lead, bulk (B43)
* Use “L” for resistance
values < 0.01
Notes
(1) WSL marking (www.vishay.com/doc?30327)
(2) Packaging code: EB (lead (Pb)-free) and TB (tin / lead) are non-standard packaging codes designating 1000 piece reels. These non-standard
packaging codes are identical to our standard EA (lead (Pb)-free) and TA (tin / lead), except that they have a package quantity of 1000 pieces
Revision: 21-Mar-2019
Document Number: 30108
1
For technical questions, contact: ww2bresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
WSK2512
www.vishay.com
Vishay Dale
DIMENSIONS in inches (millimeters)
L
W
H
B
T
A
l
b
d
c
a
e
Notes
• 3D models available: www.vishay.com/doc?30323
• Surface mount solder profile recommendations: www.vishay.com/doc?31052
DIMENSIONS
RESISTANCE
RANGE
MODEL
L
W
H
0.001 to 0.0049
A
B
0.105 ± 0.010
[2.66 ± 0.254]
0.0005 to 0.00099
WSK2512
T
0.250 ± 0.010
(6.35 ± 0.254)
0.125 ± 0.010
(3.18 ± 0.254)
0.025 ± 0.010
(0.635 ± 0.254)
0.087 ± 0.010
(2.21 ± 0.254)
0.030 ± 0.010 0.020 ± 0.010
(0.762 ± 0.254) (0.508 ± 0.254)
0.047 ± 0.010
(1.19 ± 0.254)
0.005 to 0.2
SOLDER PAD DIMENSIONS
RESISTANCE
RANGE
a
0.0005 to 0.0049
0.130 (3.30)
0.005 to 0.2
0.090 (2.29)
MODEL
WSK2512
b
c
d
e
0.130 (3.30)
0.030 (0.76)
0.020 (0.51)
0.067 (1.70)
l
0.065 (1.65)
0.145 (3.68)
ELECTRICAL CONNECTION
E1
I1
I2
E2
Notes
• E1 and E2: voltage sense connections
• I1 and I2: current connection
Revision: 21-Mar-2019
Document Number: 30108
2
For technical questions, contact: ww2bresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
WSK2512
www.vishay.com
Vishay Dale
Rated Power in %
DERATING
PULSE CAPABILITY
120
100
click to get started
80
60
40
US
ILL
20
0
- 65 - 50
- 25
0
25
50
75
100
125
150
E
IV
AT
R
T
ES
OS
P
R
PU
LY
ON
170
Ambient Temperature in °C
70
www.vishay.com/resistors/power-metal-strip-calculator
PERFORMANCE
TEST
CONDITIONS OF TEST
TEST LIMITS
Thermal shock
-55 °C to +150 °C, 1000 cycles, 15 min at each extreme
± 0.5 % + 0.0005
Short time overload
5 x rated power for 5 s
± 0.5 % + 0.0005
Low temperature operation
-65 °C for 24 h
± 0.5 % + 0.0005
High temperature exposure
1000 h at +170 °C
± 1.0 % + 0.0005
Bias humidity
+85 °C, 85 % RH, 10 % bias, 1000 h
± 0.5 % + 0.0005
Mechanical shock
100 g’s for 6 ms, 5 pulses
± 0.5 % + 0.0005
Vibration
Frequency varied 10 Hz to 2000 Hz in 1 min, 3 directions, 12 h
± 0.5 % + 0.0005
Load life
1000 h at rated power, +70 °C, 1.5 h “ON”, 0.5 h “OFF”
± 1.0 % + 0.0005
Resistance to solder heat
+260 °C solder, 10 s to 12 s dwell, 25 mm/s emergence
± 0.5 % + 0.0005
Moisture resistance
MIL-STD-202, method 106, 0 % power, 7a and 7b not required
± 0.5 % + 0.0005
PACKAGING
(1)
REEL
MODEL
WSK2512
TAPE WIDTH
DIAMETER
PIECES / REEL
CODE
12 mm / embossed plastic
178 mm / 7"
2000
EA
Notes
• Embossed carrier tape per EIA-481
(1) Additional packaging details at www.vishay.com/doc?20051
Revision: 21-Mar-2019
Document Number: 30108
3
For technical questions, contact: ww2bresistors@vishay.com
THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT
ARE SUBJECT TO SPECIFIC DISCLAIMERS, SET FORTH AT www.vishay.com/doc?91000
Legal Disclaimer Notice
www.vishay.com
Vishay
Disclaimer
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Revision: 09-Jul-2021
1
Document Number: 91000