WSR High Power
Vishay Dale
Power Metal Strip
®
Resistors,
Low Value (Down to 0.001
),
Surface Mount
FEATURES
• Molded high temperature encapsulation
• Improved thermal management incorporated
into design
• Ideal for all types of current sensing, voltage
division and pulse applications including
switching and
linear
power
supplies,
instrumentation, power amplifiers
• Proprietary processing technique produces
extremely low resistance values (down to
0.001
)
• All welded construction
• Solid metal nickel-chrome or manganese-copper alloy
resistive element with low TCR (< 20 ppm/°C)
• Solderable terminations
• Very low inductance 0.5 nH to 5 nH
• Excellent frequency response to 50 MHz
• Low thermal EMF (< 3 μV/°C)
• Integral heat sink not utilized for resistance values less
than 0.0075
• Compliant to RoHS Directive 2002/95/EC
STANDARD ELECTRICAL SPECIFICATIONS
GLOBAL
MODEL
WSR5
SIZE
4527
POWER RATING
P
70 °C
W
5.0
(1)
RESISTANCE VALUE RANGE
Tol. ± 0.5 %
0.01 to 0.3
Tol. ± 1 %
0.001 to 0.3
WEIGHT
(typical)
g/1000 pieces
476
Notes
• Part marking: DALE, model, value, tolerance, date code.
(1)
The WSR5 is rated at 5 W with terminal temperature maintained
120 °C.
TECHNICAL SPECIFICATIONS
PARAMETER
Temperature coefficient
Dielectric withstanding voltage
Insulation resistance
Operating temperature range
Maximum working voltage
UNIT
ppm/°C
V
AC
°C
V
WSR5
± 110 for 0.0075
to 0.0099
± 75 for 0.01
to 0.3
> 500
> 10
9
- 65 to + 275
(P x
R)
1/2
GLOBAL PART NUMBER INFORMATION
Global Part Numbering example: WSR5R0100FTA (preferred part numbering format)
W
GLOBAL MODEL
WSR5
S
R
5
R
0
1
0
0
F
T
A
SPECIAL
(Dash number)
(Up to 2 digits)
From
1 to 99
as
applicable
VALUE
L
= m*
R
= Decimal
5L000
= 0.005
R0100
= 0.01
* use “L” for resistance
values < 0.01
WSR5
TOLERANCE CODE
D
= ± 0.5 %
F
= ± 1.0 %
J
= ± 5.0 %
PACKAGING
EA
= Lead (Pb)-free, tape/reel
EK
= Lead (Pb)-free, bulk
TA
= Tin/lead, tape/reel (R86)
BA
= Tin/lead, bulk (B43)
Historical Part Numbering example: WSR5 0.01
1 % R86 (will continue to be accepted)
0.01
RESISTANCE VALUE
1%
TOLERANCE CODE
R86
PACKAGING
HISTORICAL MODEL
* Pb containing terminations are not RoHS compliant, exemptions may apply
** Please see document “Vishay Material Category Policy”:
www.vishay.com/doc?99902
www.vishay.com
438
For technical questions, contact:
ww2bresistors@vishay.com
Document Number: 31059
Revision: 06-Dec-10
WSR High Power
Power Metal Strip
®
Resistors,
Low Value (Down to 0.001
),
Surface Mount
DIMENSIONS
W
W1
T
L
I
a
b
H
Vishay Dale
MODEL
WSR5
DIMENSIONS
in inches (millimeters)
L
H
T
W
W
1
0.455 ± 0.032 0.095 ± 0.005 0.100 ± 0.010 0.275 ± 0.005 0.215 ± 0.005
(11.56 ± 0.813) (2.41 ± 0.127) (2.54 ± 0.254) (6.98 ± 0.127) (5.46 ± 0.127)
MODEL
WSR5
SOLDER PAD DIMENSIONS
in inches (millimeters)
a
0.155
(3.94)
b
0.230
(5.84)
l
0.205
(5.21)
DERATING
Rated Power in %
120
100
80
60
40
20
0
- 65
- 25
25
75
70
125
175
225
275
Ambient Temperature °C
PERFORMANCES
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
- 55 °C to + 150 °C, 1000 cycles, 15 min at each extreme
3 x rated power for 5 s
- 65 °C for 24 h
1000 h at + 275 °C
+ 85 °C, 85 % RH, 10 % bias, 1000 h
100
g’s
for 6 ms, 5 pulses
Frequency varied 10 Hz to 2000 Hz in 1 min, 3 directions, 12 h
1000 h at 70 °C
260 ± 3 °C 10 s to 12 s dwell, 25 mm/s emergence
MIL-STD-202, method 106, 0 % power, 7a and 7b not required
TEST LIMITS
± (0.5 % + 0.0005
) R
± (2.0 % + 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
± (2.0 % + 0.0005
) R
± (0.5 % + 0.0005
) R
± (0.5 % + 0.0005
) R
PACKAGING
MODEL
WSR5
REEL
TAPE WIDTH
24 mm/embossed plastic
DIAMETER
330 mm/13"
PIECES/REEL
1500
CODE
EA
Note
• Embossed Carrier Tape per EIA-481.
Document Number: 31059
Revision: 06-Dec-10
For technical questions, contact:
ww2bresistors@vishay.com
www.vishay.com
439
Legal Disclaimer Notice
Vishay
Disclaimer
ALL PRODUCT, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE TO IMPROVE
RELIABILITY, FUNCTION OR DESIGN OR OTHERWISE.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf (collectively,
“Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained in any datasheet or in any other
disclosure relating to any product.
Vishay makes no warranty, representation or guarantee regarding the suitability of the products for any particular purpose or
the continuing production of any product. To the maximum extent permitted by applicable law, Vishay disclaims (i) any and all
liability arising out of the application or use of any product, (ii) any and all liability, including without limitation special,
consequential or incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular
purpose, non-infringement and merchantability.
Statements regarding the suitability of products for certain types of applications are based on Vishay’s knowledge of typical
requirements that are often placed on Vishay products in generic applications. Such statements are not binding statements
about the suitability of products for a particular application. It is the customer’s responsibility to validate that a particular
product with the properties described in the product specification is suitable for use in a particular application. Parameters
provided in datasheets and/or specifications may vary in different applications and performance may vary over time. All
operating parameters, including typical parameters, must be validated for each customer application by the customer’s
technical experts. Product specifications do not expand or otherwise modify Vishay’s terms and conditions of purchase,
including but not limited to the warranty expressed therein.
Except as expressly indicated in writing, Vishay products are not designed for use in medical, life-saving, or life-sustaining
applications or for any other application in which the failure of the Vishay product could result in personal injury or death.
Customers using or selling Vishay products not expressly indicated for use in such applications do so at their own risk and agree
to fully indemnify and hold Vishay and its distributors harmless from and against any and all claims, liabilities, expenses and
damages arising or resulting in connection with such use or sale, including attorneys fees, even if such claim alleges that Vishay
or its distributor was negligent regarding the design or manufacture of the part. Please contact authorized Vishay personnel to
obtain written terms and conditions regarding products designed for such applications.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this document or by
any conduct of Vishay. Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000
Revision: 11-Mar-11
www.vishay.com
1
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