VCS232
Vishay Foil Resistors
Ultra High Precision Foil Power Current Sensing Resistor with
Absolute TCR of ± 2 ppm/°C, ESD Immunity up to 25 kV and
Tolerance of ± 0.02 %, Power Rating up to 2 W
FEATURES
•
Temperature coefficient of resistance (TCR):
± 2 ppm/°C typical (- 55 °C to + 125 °C,
+ 25 °C ref.)
•
Power rating at + 25 °C: 2 W (free air)
•
Tolerance: to ± 0.02 %
•
Load life stability: to ± 0.01 %, 25 °C for 2000 h at rated
power
•
Maximum current: 3 A
•
Resistance range: 0.2
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 100.234
Ω
vs. 100
Ω)
•
Electrostatic discharge (ESD) up to 25 000 V
•
Short time overload
≤
0.005 %
•
Non-inductive, non-capacitive design
•
Rise time: 1 ns effectively no ringing
•
Thermal stabilization < 1 s
•
Current noise < - 40 dB
•
Thermal EMF: 0.05 µV/°C
•
Voltage coefficient < 0.1 ppm/V
•
Non-inductive: 0.08 µH
•
Non hot spot design
•
Terminal finish: lead (Pb)-free or tin/lead alloy
•
Compliant to RoHS directive 2002/95/EC
•
For better performances please contact us
•
Prototype quantities available in just 5 working days
or sooner. For more information, please contact
foil@vishay.com
INTRODUCTION
Vishay Foil has developed a new resistor concept, through
the use of a proprietary Bulk Metal
®
Foil and new
nanometer-level photo-etching techniques created by the
company so that the conductor can closely approximate a
flat wire. Because the metals used are not drawn, wound or
mistreated in any way during the manufacturing process,
Vishay Foil resistors maintain all their design, physical and
electrical characteristics. These characteristics are both
measurable and predictable before, during and after
manufacturing.
Through the entire process, every step is carefully controlled
not only to keep the metal in its virgin state, but also to
eliminate the effects of any stress that might be imposed
either during manufacture or use.
IM
PR
O
VE
D
RESISTANCE
RANGE
(Ω)
0.2 to < 1.0
> 1 to 10
TIGHTEST
RESISTANCE
TOLERANCE
(%)
± 0.05
TYPICAL TCR AND
MAX. SPREAD
(ppm/°C)
(1)
± 2 ± 13
±2±3
± 0.05
> 10 to 500
± 0.02
±2±3
Notes
(1)
- 55 °C to + 125 °C, + 25 °C ref.
• Contact applications engineering for other available values
TABLE 1 - TOLERANCE AND TCR
FIGURE 1 - POWER DERATING CURVE
- 55 °C
+ 25 °C
+ 100
+ 75
+ 50
+ 25
Percent of
Rated Power
0
- 50
0
+ 50
+ 100
+ 150
+ 200
Ambient Temperature (°C)
(Further Derating Not Necessary)
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63151
Revision: 05-May-09
For any questions, contact:
foil@vishay.com
www.vishay.com
1
PR
O
DU
CT
APPLICATIONS
•
•
•
•
•
•
•
•
Automatic test equipment (ATE)
High precision instrumentation
Electron beam application
Current sensing applications
Pulse applications
Military
Power amplifier
Power supplies
R
I
I
I
1
E
1
V
E
2
I
2
VCS232
Vishay Foil Resistors
FIGURE 2 - TRIMMING TO VALUES
(Conceptual Illustration)
FIGURE 3 - TYPICAL RESISTANCE/
TEMPERATURE CURVE
+ 150
Interloop Capacitance
Reduction in Series
Current Path
Before Trimming
Current Path
After Trimming
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing
Resistance
Mutual Inductance
Reduction due
to Change in
Current Direction
Note:
Foil shown in
black,
etched spaces in
white
FIGURE 4 - DIMENSIONS
in inches (millimeters)
L
D
2
D
1
LS
IM
PR
O
VE
D
LT
MODEL
L
MAX.
H
MAX.
W
MAX.
LL
MIN.
VCS232
1.240 (31.50)
0.512 (13.00)
0.177 (4.50)
0.500 (12.70)
TABLE 2 - VCS232 PERFORMANCE SPECIFICATIONS
TEST
(Conditions per MIL-PRF-49465)
Thermal Shock
CONDITIONS
MIL-PRF-49465B
ΔR
LIMITS
± (0.5 % + 0.0005R)
± (0.5 % + 0.0005R)
± (0.25 % + 0.0005R)
± (1.0 % + 0.0005R)
± (1.0 % + 0.0005R)
± (0.5 % + 0.0005R)
± (0.5 % + 0.0005R)
± (0.1 % + 0.0005R)
± (0.1 % + 0.0005R)
± (1.0 % + 0.0005R)
95 % coverage
TYPICAL
ΔR
LIMITS
± 0.01 %
± 0.005 %
± 0.01 %
± 0.002 %
± 0.01 %
± 0.002 %
± 0.01 %
± 0.01 %
± 0.01 %
± 0.01 %
-
MAXIMUM
ΔR
LIMITS
± 0.02 %
± 0.01 %
± 0.02 %
± 0.005 %
± 0.02 %
± 0.005 %
± 0.02 %
± 0.02 %
± 0.02 %
± 0.02 %
-
- 55 °C to + 125 °C, 5 cycles
5 x rated power for 5 s
Short Time Overload
Resistance to Soldering Heat
Terminal Strength
10 s to 12 s at + 260 °C
Pull test at 5 lb
High Temperature Exposure
Low Temperature Storage
Moisture Resistance
2000 h, + 150 °C
MIL-PRF-49465, 24 h at - 55 °C
MIL-STD-202, method 106, + 65 °C to - 10 °C,
90 % to 98 % RH, rated power, 240 h
100 g, 6 ms
Shock (Specified Pulse)
Vibration (High Frequency)
Load Life Stability
Solderability
www.vishay.com
2
(10 Hz to 2000 Hz) 20 g
2000 h, + 25 °C at rated power
MIL-STD-202
For any questions, contact:
foil@vishay.com
PR
O
DU
CT
+ 50
0
+ 100
Δ
R
± 2 ppm/°C (+ 25 °C Reference)
R
(ppm)
- 50
- 100
- 150
- 200
- 50
- 25
0
+ 25
+ 50
+ 75
+ 100
+ 125
Ambient Temperature (°C)
W
H
LL
Tin/Lead or Lead (Pb)-free
Solder coated
copper leads
LS
± 0.20 (± 0.5)
0.688 (17.48)
LT
± 0.20 (± 0.5)
1.083 (27.51)
D
1
NOM.
0.040 (1.02)
D
2
NOM.
0.032 (0.81)
Document Number: 63151
Revision: 05-May-09
VCS232
Vishay Foil Resistors
POST MANUFACTURING OPERATIONS OR PMO FOR IMPROVED EOL
Many analog applications can include requirements for
performance under conditions of stress beyond the norm and
over extended periods of time. This calls for more than just
selecting a standard device and applying it to a circuit. The
standard device may turn out to be all that is needed but an
analysis of the projected service conditions should be made
and it may well dictate a routine of stabilization known as
post manufacturing operations or PMO. The PMO operations
that will be discussed are only applicable to Bulk Metal Foil
resistors. They stabilize Bulk Metal Foil resistors while they
may be harmful to other types. Short time overload,
accelerated load life, and temperature cycling are the three
PMO methods that do the most to remove the anomalies
down the road. Vishay Bulk Metal Foil resistors are
inherently stable as manufactured. These PMO methods are
only of value on Bulk Metal Foil resistors and they improve
the performance by small but significant amounts. Users are
encouraged to contact Vishay Foil applications engineering
for assistance in choosing the PMO operations that are right
for their application.
TABLE 3 - GLOBAL PART NUMBER INFORMATION
(1)
DENOTES PRECISION
Y
VALUE
R
=
Ω
NEW GLOBAL PART NUMBER: Y094245R2361Q9L (preferred part number format)
Y
0
9
4
2
4
5
PRODUCT CODE
0942
= VCS232
RESISTANCE TOLERANCE
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
D
= ± 0.5 %
F
= ± 1.0 %
G
= ± 2.0 %
J
= ± 5.0 %
IM
PR
O
VE
D
FOR EXAMPLE: ABOVE GLOBAL ORDER Y0942 45R2361 Q 9 L:
TYPE: VCS232
VALUES: 45.2361
Ω
ABSOLUTE TOLERANCE: ± 0.02 %
TERMINATION: lead (Pb)-free
PACKAGING: bulk pack
HISTORICAL PART NUMBER: VCS232T 45R2361 TCR2 Q B (will continue to be used)
VCS232
MODEL
T
45R2361
TCR2
TCR
CHARACTERISTIC
Q
ABSOLUTE
TOLERANCE
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
D
= ± 0.5 %
F
= ± 1.0 %
G
= ± 2.0 %
J
= ± 5.0 %
B
PACKAGING
B
= bulk
TERMINATION
OHMIC VALUE
45.2361
Ω
VCS232
T
= lead (Pb)-free
None = tin/lead
Note
(1)
For non-standard requests, please contact application engineering.
Document Number: 63151
Revision: 05-May-09
For any questions, contact:
foil@vishay.com
PR
O
DU
CT
CHARACTERISTICS
0
= standard
9
= lead (Pb)-free
1 to 999
= custom
R
2
3
6
1
Q
9
L
PACKAGING
L
= bulk
www.vishay.com
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
www.vishay.com
1
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