VCS331, VCS332
Vishay Foil Resistors
Bulk Metal
®
Foil Technology High Precision 4-Terminal Power
Current Sensing Resistors with TCR as low as ± 1 ppm/°C Maximum,
Tolerance ± 0.1 % and Rise Time 1.0 ns Effectively No Ringing
FEATURES
INTRODUCTION
The VCS331 and VCS332 offer precision Bulk Metal
®
Foil
technology resistors as low as 0.25
Ω
with a temperature
coefficient down to 1 ppm/°C maximum and unmatched long
term stability. The 4 terminal current sensing resistors, when
mounted on a heat sink, can sustain 10 W continuously
without an appreciable change in resistance (0.15 %
maximum). The typical 50 % power derating specification
associated with other technologies is not necessary. A
choice of lead configurations is available.
Our application engineering department is available to
advise and make recommendations. For non-standard
technical requirements and special applications, please
contact us.
IM
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TABLE 1 - CHARACTERISTICS
MODEL NUMBER
VCS331, VCS332
RESISTANCE RANGE
0.25
Ω
< R < 500
Ω
BEST TOLERANCE
(1)
± 0.1 %
Notes
(1)
Tighter tolerance is available - for more details contact application engineering
(2)
The lower of the two limitations (power or current) is decisive
(3)
Heatsink - aluminum (6" length x 4" width x 2" height x 0.04" thick)
TABLE 2 - TCR CHART
(maximum)
(0 °C TO + 60 °C)
Percent of
Rated Power
≥
0.25
Ω
to
<1
Ω
± 3 ppm/°C
≥
1
Ω
to
< 10
Ω
± 2 ppm/°C
≥
10
Ω
to
< 500
Ω
± 1 ppm/°C
* Pb containing materials are not RoHS compliant, exemptions may apply
Document Number: 63153
Revision: 06-Oct-09
For any questions, contact:
foil@vishay.com
www.vishay.com
1
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•
Temperature coefficient of resistance (TCR):
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
down to ± 1 ppm/°C max. (see table 2)
Tolerance: to ± 0.1 % (see table 1)
Power rating (heat-sinked): 10 W
Load life stability: ± 0.01 % (100 ppm) at 25 °C,
2000 h at rated power
Resistance range: 0.25
Ω
to 500
Ω
Vishay Foil resistors are not restricted to standard
values; specific “as required” values can be supplied
at no extra cost or delivery (e.g. 1R2345 vs. 1R)
Electrostatic discharge (ESD) up to 25 000 V
Non-inductive, non-capacitive design
Rise time: 1.0 ns effectively no ringing
Current noise: 0.010 µV
RMS
/V of applied voltage (< - 40 dB)
Thermal EMF: 0.05 µV/°C typical
Voltage coefficient: < 0.1 ppm/V
Non-inductive: 0.08 µH
Non hot spot design
Thermal stabilization time < 1 s (nominal value achieved
within 10 ppm of steady state value)
Terminal finish: lead (Pb)-free or tin/lead alloy
Prototype quantities available in just 5 working days
or sooner. For more information, please contact
foil@vishay.com
For better performances, please contact application
engineering
POWER RATING
(2)
at + 25 °C
10 W on heat sink
(3)
or 3 W in free air
MAXIMUM CURRENT
(2)
5A
FIGURE 1 - POWER DERATING CURVE
- 55 °C
+ 100
+ 75
+ 50
+ 25
0
- 50
0
+ 50
+ 100
+ 150
+ 200
+ 25 °C
Ambient Temperature °C
(Further Derating Not Necessary)
VCS331, VCS332
Vishay Foil Resistors
FIGURE 2 - TRIMMING TO VALUES
(conceptual illustration)
Mutual
Inductance
Reduction due
to Opposing
Current in
Adjacent Lines
Note:
Foil shown in black, etched spaces in white
FIGURE 3- DIMENSIONS
in inches (millimeters)
AND SCHEMATIC
Model VCS331 (E Lead Rectangular)
D1
L1
L2
W2
W1
IM
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D
H2
H1
VISHAY
VCS331
0R3000 1%
B9825
D2
LL
p
T
LS
LT
I
I
1
E
1
MODEL
L
1
± 0.008
(± 0.20)
1.340
(34.04)
L
2
± 0.008
(± 0.20)
0.701
(17.81)
H
1
MAX.
H
2
± 0.008
(± 0.20)
0.197
(5.00)
W
1
MAX.
W
2
MAX.
VCS331
1.063
(27.00)
0.210
(5.33)
0.087
(2.21)
VCS332
1.340
(34.04)
0.701
(17.81)
1.024
(26.01)
0.197
(5.00)
0.210
(5.33)
0.087
(2.21)
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2
For any questions, contact:
foil@vishay.com
PR
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Current Path
Before Trimming
Current Path
After Trimming
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing Resistance
Interloop
Capacitance
Reduction
in Series
Model VCS332 (Round Leads)
L1
L2
D1
W2
W1
H2
H1
VISHAY
VCS332
8R2000 0.1%
B9825
LL
D2
p
R
I
E
2
I
2
LS
LT
V
LL
MIN.
0.216
(5.49)
1.000
(25.40)
LS
± 0.020
(± 0.51)
0.689
(17.50)
0.689
(17.50)
LT
± 0.020
(± 0.51)
1.083
(27.51)
1.083
(27.51)
D
1
NOM.
0.138
(3.51)
0.138
(3.51)
D
2
NOM.
0.040
(1.02)
0.040
(1.02)
P
NOM.
0.040
(1.02)
0.032
(0.81)
T
NOM.
0.016
(0.41)
-
Document Number: 63153
Revision: 06-Oct-09
VCS331, VCS332
Vishay Foil Resistors
TABLE 3 - VISHAY VCS331, VCS332 PERFORMANCE
TEST OR CONDITION
Thermal Shock
Short Time Overload
(5 x rated power for 5 s)
Terminal Strength
High Temperature Exposure
(2000 h at + 150 °C)
Moisture Resistance
Low Temperature Storage
(24 h at - 55 °C)
Shock
(specified pulse)
Vibration
(high frequency)
Load Life
(rated power, + 25 °C, 2000 h)
Resistance Tolerance
Thermal EMF
Weight
Notes
(1)
ΔR’s
plus additional 0.0005
Ω
for measurement error
VCS331, VCS332 PERFORMANCE
(1)
TYPICAL
ΔR
LIMITS
0.01 %
0.01 %
MAXIMUM
ΔR
LIMITS
0.02 %
0.02 %
0.05 %
TABLE 4 - GLOBAL PART NUMBER INFORMATION
(1)
DENOTES PRECISION
Y
VALUE
R
=
Ω
NEW GLOBAL PART NUMBER: Y09600R25000B9L (preferred part number format)
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Y
0
9
6
0
0
R
PRODUCT CODE
0960
= VCS331
0944
= VCS332
RESISTANCE TOLERANCE
B
= ± 0.1 %
D
= ± 0.5 %
F
= ± 1.0 %
G
= ± 2.0 %
J
= ± 5.0 %
FOR EXAMPLE: ABOVE GLOBAL ORDER Y0960 0R25000 B 9 L:
TYPE: VCS331
VALUE: 0.25
Ω
ABSOLUTE TOLERANCE: ± 0.1 %
TERMINATION: lead (Pb)-free
PACKAGING: bulk
HISTORICAL PART NUMBER: VCS331T 0R2500 B B (will continue to be used)
VCS331
T
0R2500
B
TOLERANCE
B
= ± 0.1 %
D
= ± 0.5 %
F
= ± 1.0 %
G
= ± 2.0 %
J
= ± 5.0 %
B
PACKAGING
B
= Bulk Pack
MODEL
VCS331
VCS332
TERMINATION
T
= lead (Pb)-free
None = tin/lead alloy
RESISTANCE VALUE
0.25
Ω
Note
(1)
For non-standard requests, please contact application engineering
Document Number: 63153
Revision: 06-Oct-09
For any questions, contact:
foil@vishay.com
PR
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CT
0.02 %
0.02 %
0.05 %
0.03 %
0.05 %
0.005 %
0.01 %
0.01 %
0.02 %
0.01 %
0.01 %
0.1 %
0.02 %
0.02 %
1%
0.2 µV/°C max. (E terminal)
8.1 g maximum
CHARACTERISTICS
0
= standard
9
= lead (Pb)-free
1 to 999
= custom
2
5
0
0
0
B
9
L
PACKAGING
L
= bulk pack
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3
Legal Disclaimer Notice
Vishay
Disclaimer
All product specifications and data are subject to change without notice.
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 herein
or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
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.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such
applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting
from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding
products designed for such applications.
Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000
Revision: 18-Jul-08
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