300 Series
Vishay Foil Resistors
Bulk Metal
®
Foil Technology High Precision
4-Terminal Power Current Sensing Resistors with
TCR as low as ± 1 ppm/°C and Tolerance ± 0.1 %
FEATURES
•
Temperature Coefficient of Resistance (TCR):
Any value at any tolerance available within resistance range
The 300 Series offers precision Bulk Metal
®
Foil technology
resistors as low as 5 mΩ with a temperature coefficient
down to 1 ppm/°C and unmatched long term stability. The
4 terminal current sensing resistors, when mounted on a
heat sink, can sustain 10 watts 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.
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TABLE 1 - CHARACTERISTICS
MODEL NUMBER
VCS301, VCS302
RESISTANCE RANGE
0.005
Ω
< R < 0.1
Ω
0.1
Ω ≤
R < 0.25
Ω
0.25
Ω
< R < 500
Ω
TOLERANCE
1)
±1%
VCS331, VCS332
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 inches length x 4 inches width x 2 inches height x 0.04 inches thick)
TABLE 2 - TCR CHART (MAXIMUM)
(0 °C TO + 60 °C)
< 0.01
Ω
< 0.05
Ω
< 0.1
Ω
<1
Ω
Percent of
Rated Power
≥
0.005
Ω
≥
0.01
Ω
≥
0.05
Ω
≥
0.1
Ω
≥
1
Ω
to
to
± 15 ppm/°C
± 10 ppm/°C
± 5 ppm/°C
± 3 ppm/°C
± 2 ppm/°C
± 1 ppm/°C
to
to
to
to
< 10
Ω
≥
10
Ω
< 500
Ω
* Pb containing materials are not RoHS compliant, exemptions may apply
Document Number: 63018
Revision: 26-Jun-07
For any questions, contact: foil@vishay.com
www.vishay.com
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•
Tolerance: to ± 0.1 % (see table 1)
RoHS*
COMPLIANT
•
Power Rating (heat-sinked): 10 W
•
Load Life Stability: ± 0.05 % at 25 °C, 2000 hours at Rated
Power
•
Resistance Range: 0.005
Ω
to 500
Ω
•
Electrostatic Discharge (ESD) above 25 000 V
•
Non Inductive, Non Capacitive Design
Rise Time: 1.0 ns without ringing
Current Noise: < - 40 dB
Thermal EMF: 0.05 µV/°C typical
Voltage Coefficient: < 0.1 ppm/V
Non Inductive: 0.08 µH
Non Hot Spot Design
Terminal Finishes available: Lead (Pb)-free
Tin/Lead Alloy
•
Any value available within resistance range (e.g. 1K2345)
•
Prototype samples available from 48 hours. For more
information, please contact foil@vishay.com
•
For better performances, please contact Application
Engineering
•
•
•
•
•
•
•
Available
down to ± 1 ppm/°C Max. (see table 2)
Pb-free
POWER RATING
2)
at + 25 °C
10 W on
Heat Sink
3)
or
3 W in Free Air
MAXIMUM CURRENT
2)
15 A
5A
± 0.5 %
± 0.1 %
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)
300 Series
Vishay Foil Resistors
Bulk Metal
®
Foil Technology High Precision
4-Terminal Power Current Sensing Resistors with
TCR as low as ± 1 ppm/°C and Tolerance ± 0.1 %
FIGURE 3 - TYPICAL TCR CURVE
+ 150
+ 100
FIGURE 2 - TRIMMING TO VALUES
(Conceptual Illustration)
Mutual Inductance
Reduction due
to Change in
Current Direction
Current Path
After Trimming
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing
Resistance
Note:
Foil shown in
black,
etched spaces in
white
FIGURE 4 - DIMENSIONS
in inches (millimeters)
AND SCHEMATIC
Model VCS301 and VCS331 (E Lead Rectangular)
D1
L1
L2
W2
W1
H2
VISHAY
VCS331
0R3000 1%
B9825
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H1
D2
LL
p
T
LS
LT
I
I
1
E
1
MODEL
L
1
± 0.008
(± 0.20)
1.340
(34.04)
1.340
(34.04)
H
2
W
2
LL
LS
L
2
H
1
W
1
± 0.008 MAXIMUM ± 0.008 MAXIMUM MAXIMUM MINIMUM ± 0.020
(± 0.20)
(± 0.20)
(± 0.51)
0.701
(17.81)
0.701
(17.81)
1.063
(27.00)
1.024
(26.01)
0.197
(5.00)
0.197
(5.00)
0.210
(5.33)
0.210
(5.33)
0.087
(2.21)
0.087
(2.21)
0.216
(5.49)
1.000
(25.40)
0.689
(17.50)
0.689
(17.50)
VCS301
VCS331
VCS302
VCS332
www.vishay.com
2
For any questions, contact: foil@vishay.com
PR
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- 50
- 100
- 150
- 200
Interloop Capacitance
Reduction in Series
Current Path
Before Trimming
∆
R
+ 50
0
R
(ppm)
± 2 ppm/°C (+ 25 °C reference)
0
+ 20
+ 50
+ 75
- 50
- 55
- 25
+ 100
+ 125
Ambient Temperature (°C)
(For more details, see table 2)
Model VCS302 and 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
LT
± 0.020
(± 0.51)
1.083
(27.51)
1.083
(27.51)
D
2
P
D
1
NOMINAL NOMINAL NOMINAL
T
NO
0.138
(3.51)
0.138
(3.51)
0.040
(1.02)
0.040
(1.02)
0.040
(1.02)
0.032
(0.81)
0.016
(0.41)
-
Document Number: 63018
Revision: 26-Jun-07
300 Series
Bulk Metal
®
Foil Technology High Precision
Vishay Foil Resistors
4-Terminal Power Current Sensing Resistors with
TCR as low as ± 1 ppm/°C and Tolerance ± 0.1 %
TABLE 3 - VISHAY VCS301, VCS302, VCS331, VCS332 PERFORMANCE
TEST OR CONDITION
Maximum Ambient Temperature
at Rated Power
Maximum Ambient Temperature
at Zero Power
Temperature Coefficient
Thermal Shock
Short Time Overload
(5 x Rated Power for 5 seconds)
Terminal Strength
High Temperature Exposure
Moisture Resistance
Low Temperature Storage
(24 hours at - 55 °C)
Shock
(Specified Pulse)
Vibration
(High Frequency)
Load Life
(Rated Power, + 25 °C, 2000 hours)
Resistance Tolerance
Thermal EMF
Weight
Case Temperature Rise
Thermal Resistance
Notes
1.
ΔR’s
plus additional 0.0005
Ω
for measurement error
2. All measurements done in free air
VCS301, VCS302, VCS331, VCS332 PERFORMANCE
1)
± 25 °C
± 150 °C
see table 2
TABLE 4 - GLOBAL PART NUMBER INFORMATION
NEW GLOBAL PART NUMBER: Y09600R25000B9L (preferred part number format)
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DENOTES PRECISION
Y
0
9
6
0
0
R
PRODUCT CODE
0959
= VCS301
0943
= VCS302
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
VCS301
VCS302
VCS331
VCS332
TERMINATION
T
= Lead (Pb)-free
None = Tin/Lead alloy
RESISTANCE VALUE
0.25
Ω
Note
* For non-standard requests, please contact Application Engineering.
Document Number: 63018
Revision: 26-Jun-07
For any questions, contact: foil@vishay.com
www.vishay.com
3
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± 0.02 %
± 0.05 %
± 0.05 %
± 0.1 %
± 0.05 % (2000 hours at 150 °C)
± 0.05 %
± 0.1 %
± 0.05 %
0.1 %, 0.5 %, 1 %, 2 %, 5 %
0.2 µV/°C Max. (E Terminal)
8.1 g maximum
17
°C/W
2)
(VCS301, VCS302) - 9 °C/W
2)
(VCS331, VCS332)
8 °C/W
2)
(VCS301, VCS302) - 12.5 °C/W
2)
(VCS331, VCS332)
VALUE
R
=
Ω
AER*
0
= Standard
9
= Lead (Pb)-free
1 - 999
= Custom
± 0.05 %
2
5
0
0
0
B
9
L
PACKAGING
L
= Bulk Pack
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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