WSR High Power
Vishay Dale
Power Metal Strip® Resistors, High Power (5 W),
Low Value (down to 0.001 Ω), Surface Mount
FEATURES
• Molded high temperature encapsulation
• Improved thermal management incorporated
into design
Pb-free
Available
• Ideal for all types of current sensing, voltage
division and pulse applications including
switching and linear power supplies,
instrumentation, power amplifiers
e2
RoHS*
COMPLIANT
• Proprietary processing technique produces
extremely low resistance values (down to 0.001 Ω)
• 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)
• Lead (Pb)-free version is RoHS compliant
• Integral heat sink not utilized for resistance values less
than 0.0075 Ω
STANDARD ELECTRICAL SPECIFICATIONS
RESISTANCE RANGE Ω
0.5 ꢀ
POWER RATING
P70 °C
GLOBAL
MODEL
SIZE
W
1 ꢀ
0.001 - 0.3
WSR5
4527
5.0 (1)
0.01 - 0.3
Note
(1) The WSR5 is rated at 5 W with terminal temperature maintained ≤ 120 °C
• Part Marking: DALE, Model, Value, Tolerance, Date Code
TECHNICAL SPECIFICATIONS
PARAMETER
UNIT
WSR5
0.0075 Ω to 0.0099 Ω = 110
0.01 Ω to 0.3 Ω = 75
> 500
Temperature Coefficient
ppm/°C
Dielectric Withstanding Voltage
Insulation Resistance
VAC
Ω
°C
V
> 109
- 65 to + 275
(P x R)1/2
476
Operating Temperature Range
Maximum Working Voltage
Weight/1000 pieces
g
GLOBAL PART NUMBER INFORMATION
NEW GLOBAL PART NUMBERING: WSR5R0100FTA (PREFERRED PART NUMBERING FORMAT)
W
S
R
5
R
0
1
0
0
F
T
A
GLOBAL MODEL
VALUE
L = mΩ*
R = Decimal
5L000 = 0.005 Ω
R0100 = 0.01 Ω
TOLERANCE
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)
SPECIAL
(Dash Number)
(up to 2 digits)
From 1 - 99 as
applicable
WSR5
* use “L” for resistance
values < 0.01 Ω
HISTORICAL PART NUMBER EXAMPLE: WSR5 0.01 Ω 1 % R86 (WILL CONTINUE TO BE ACCEPTED)
WSR5
0.01 Ω
1 %
R86
HISTORICAL MODEL
RESISTANCE VALUE
TOLERANCE CODE
PACKAGING
* Pb containing terminations are not RoHS compliant, exemptions may apply
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For technical questions, contact: ww2bresistors@vishay.com
Document Number: 31059
Revision: 12-Jul-07
