Document Number: 63018 For any questions, contact: foil@vishay.com www.vishay.com
Revision: 26-Jun-07 1
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 %
IMPROVED PRODUCT
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.
FEATURES
•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: ± 0.05 % 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
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)
* Pb containing materials are not RoHS compliant, exemptions may apply
Available
Pb-free
RoHS*
COMPLIANT
TABLE 1 - CHARACTERISTICS
MODEL NUMBER RESISTANCE RANGE TOLERANCE1) POWER RATING2)
at + 25 °C MAXIMUM CURRENT2)
VCS301, VCS302 0.005 Ω < R < 0.1 Ω± 1 % 10 W on
Heat Sink3)
or
3 W in Free Air
15 A
0.1 Ω ≤ R < 0.25 Ω± 0.5 %
VCS331, VCS332 0.25 Ω < R < 500 Ω± 0.1 % 5 A
TABLE 2 - TCR CHART (MAXIMUM)
(0 °C TO + 60 °C)
≥ 0.005 Ωto < 0.01 Ω± 15 ppm/°C
≥ 0.01 Ωto < 0.05 Ω± 10 ppm/°C
≥ 0.05 Ωto < 0.1 Ω± 5 ppm/°C
≥ 0.1 Ωto < 1 Ω± 3 ppm/°C
≥ 1 Ωto < 10 Ω± 2 ppm/°C
≥ 10 Ωto < 500 Ω± 1 ppm/°C
FIGURE 1 - POWER DERATING CURVE
(Further Derating Not Necessary)
+ 100
+ 75
+ 50
+ 25
0
Ambient Temperature °C
Percent of
Rated Power
- 55 °C + 25 °C
- 50 + 50
0+ 100 + 150 + 200
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 %
www.vishay.com For any questions, contact: foil@vishay.com Document Number: 63018
2Revision: 26-Jun-07
IMPROVED PRODUCT
FIGURE 2 - TRIMMING TO VALUES
(Conceptual Illustration)
Mutual Inductance
Reduction due
to Change in
Current Direction
Current Path
Before Trimming
Note: Foil shown in black, etched spaces in white
Interloop Capacitance
Reduction in Series
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing
Resistance
Current Path
After Trimming
FIGURE 3 - TYPICAL TCR CURVE
(For more details, see table 2)
- 50 - 25 0 + 20 + 50 + 75 + 100 + 125
- 55
+ 150
+ 100
+ 50
0
- 50
- 100
- 150
- 200
∆
R
R
(ppm)
Ambient Temperature (°C)
± 2 ppm/°C (+ 25 °C reference)
FIGURE 4 - DIMENSIONS in inches (millimeters) AND SCHEMATIC
Model VCS301 and VCS331 (E Lead Rectangular) Model VCS302 and VCS332 (Round Leads)
MODEL
L
1
± 0.008
(± 0.20)
L
2
± 0.008
(± 0.20)
H
1
MAXIMUM
H
2
± 0.008
(± 0.20)
W
1
MAXIMUM
W
2
MAXIMUM
LL
MINIMUM
LS
± 0.020
(± 0.51)
LT
± 0.020
(± 0.51)
D
1
NOMINAL
D
2
NOMINAL
P
NOMINAL
T
NO
VCS301
VCS331
1.340
(34.04)
0.701
(17.81)
1.063
(27.00)
0.197
(5.00)
0.210
(5.33)
0.087
(2.21)
0.216
(5.49)
0.689
(17.50)
1.083
(27.51)
0.138
(3.51)
0.040
(1.02)
0.040
(1.02)
0.016
(0.41)
VCS302
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)
1.000
(25.40)
0.689
(17.50)
1.083
(27.51)
0.138
(3.51)
0.040
(1.02)
0.032
(0.81) -
VISHAY
VCS331
0R3000 1%
B9825
VISHAY
VCS332
8R2000 0.1%
B9825
D1
D2
L1
L2
H1
H2
W1
W2
LL
LS
LT
p
D1
D2
L1
L2
H1
H2
W1
W2
LL
LS
LT
pT
I1E1I2
E2
I
V
IR
Document Number: 63018 For any questions, contact: foil@vishay.com www.vishay.com
Revision: 26-Jun-07 3
300 Series
Bulk Metal® Foil Technology High Precision
4-Terminal Power Current Sensing Resistors with
TCR as low as ± 1 ppm/°C and Tolerance ± 0.1 %
Vishay Foil Resistors
IMPROVED PRODUCT
Notes
1. ΔR’s plus additional 0.0005 Ω for measurement error
2. All measurements done in free air
Note
* For non-standard requests, please contact Application Engineering.
TABLE 3 - VISHAY VCS301, VCS302, VCS331, VCS332 PERFORMANCE
TEST OR CONDITION VCS301, VCS302, VCS331, VCS332 PERFORMANCE1)
Maximum Ambient Temperature at Rated Power ± 25 °C
Maximum Ambient Temperature at Zero Power ± 150 °C
Temperature Coefficient see table 2
Thermal Shock ± 0.05 %
Short Time Overload (5 x Rated Power for 5 seconds) ± 0.02 %
Terminal Strength ± 0.05 %
High Temperature Exposure ± 0.05 % (2000 hours at 150 °C)
Moisture Resistance ± 0.05 %
Low Temperature Storage (24 hours at - 55 °C) ± 0.05 %
Shock (Specified Pulse) ± 0.1 %
Vibration (High Frequency) ± 0.1 %
Load Life (Rated Power, + 25 °C, 2000 hours) ± 0.05 %
Resistance Tolerance 0.1 %, 0.5 %, 1 %, 2 %, 5 %
Thermal EMF 0.2 µV/°C Max. (E Terminal)
Weight 8.1 g maximum
Case Temperature Rise 17 °C/W2) (VCS301, VCS302) - 9 °C/W2) (VCS331, VCS332)
Thermal Resistance 8 °C/W2) (VCS301, VCS302) - 12.5 °C/W2) (VCS331, VCS332)
TABLE 4 - GLOBAL PART NUMBER INFORMATION
NEW GLOBAL PART NUMBER: Y09600R25000B9L (preferred part number format)
DENOTES PRECISION VALUE AER*
YR = Ω0 = Standard
9 = Lead (Pb)-free
1 - 999 = Custom
PRODUCT CODE RESISTANCE TOLERANCE PACKAGING
0959 = VCS301
0943 = VCS302
0960 = VCS331
0944 = VCS332
B= ± 0.1 %
D= ± 0.5 %
F= ± 1.0 %
G= ± 2.0 %
J= ± 5.0 %
L = Bulk Pack
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 B
MODEL TERMINATION RESISTANCE VALUE TOLERANCE PACKAGING
VCS301
VCS302
VCS331
VCS332
T = Lead (Pb)-free
None = Tin/Lead alloy
0.25 ΩB= ± 0.1 %
D= ± 0.5 %
F= ± 1.0 %
G= ± 2.0 %
J= ± 5.0 %
B = Bulk Pack
9600 250RY0 B90 L0
Document Number: 91000 www.vishay.com
Revision: 18-Jul-08 1
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