300 Series
Vishay Foil Resistors
Bulk Metal
®
Foil Technology
Precision Current Sensing Resistors
FEATURES
• Low Ohmic Value: to 0.005Ω
• Temperature Coefficient of Resistance:
15ppm/°C at 0.005Ω
Product may not
be to scale
• Tolerance: to 5% @ 0.005Ω (See Table 1)
• Power Rating:
10 Watts at 25°C on Heat Sink**
3 Watts at + 25°C in Free Air
(Further Derating Not Necessary)
• Load Life: 0.05%
∆R
@ + 25°C,
2,000 Hrs., Rated Power
• Isolated Heat Sink
The 300 Series offers precision Bulk Metal
®
Foil technology
resistors as low as 5 milliohms with an extremely low
15 ppm/°C temperature coefficient 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% derating of the power
specification associated with other technologies is not
necessary. A choice of lead configurations is available.
THROUGH HOLE
TABLE 1 - CHARACTERISTICS
MODEL
NUMBER
VCS301
VCS302
RESISTANCE
RANGE
STANDARD
RESISTANCE TOLERANCE%*
0.005Ω to < 0.1Ω
0.1Ω to 0.25Ω
1%
0.5%
POWER RATING
AT + 25
°
C
10 Watts on
Heat Sink**
or
VCS331
VCS332
MAXIMUM
CURRENT
}
}
0.005Ω
to 0.25Ω
15 Amps
> 0.25Ω
to 500Ω
0.1%
3 Watts
in Free Air
5 Amp
* Tighter Resistance Tolerance - per request
** Heatsink - Aluminum (6 inches length x 4 inches width x 2 inches height x 0.04 inches thick)
TABLE 2 - ORDERING INFORMATION
Please specify Vishay 300 Series resistors as follows:
VCS301, VCS302
VCS331, VCS332
MODEL NO.
0R0050
RESISTANCE VALUE
1.0%
TOLERANCE
SALES
• ISRAEL: foilsales.israel@vishay.com
• FRANCE/SWITZERLAND/SOUTHERN EUROPE: foilsales.eusouth@vishay.com
• AMERICAS: foilsales.usa@vishay.com
• ASIA/JAPAN: foilsales.asia@vishay.com • UK/HOLLAND/SCANDINAVIA: foilsales.eunorth@vishay.com • GERMANY/CZECH REPUBLIC/AUSTRIA: foilsales.eucentral@vishay.com
For technical questions in the Americas, contact foilsupport1@vishay.com
Document Number: 63018
For technical questions in Asia/Japan/Europe/Africa/Israel, contact foilsupport2@vishay.com
Revision 09-Mar-05
www.vishay.com
113
300 Series
Vishay Foil Resistors
Bulk Metal
®
Foil Technology
Precision Current Sensing Resistors
FIGURE 1 - DIMENSIONS
in inches (millimeters)
AND SCHEMATIC
Model VCS301 and VCS331 (E Lead Rectangular)
Model VCS302 and VCS332 (Round Leads)
D1
L1
L2
W1
W2
L1
L2
D1
W1
H2
W2
H2
VISHAY
VCS331
0R2000 1%
B9825
D2
p
LS
LT
t
LL
H1
H1
THROUGH HOLE
VISHAY
VCS332
8R2000 0.1%
B9825
p
LL
D2
LS
I
1
E
1
E
2
I
2
LT
MODEL
L
1
±
0.008
(± 0.2)
1.340
(34.0)
1.34
(34.0)
L
2
H
1
H
2
W
1
W
2
LL
LS
±
0.008 Maximum
±
0.008 Maximum Maximum Minimum
±
0.020
(± 0.2)
(± 0.2)
(± 0.5)
0.701
(17.8)
0.701
(17.8)
1.063
(27.0)
1.024
(26.0)
0.197
(5.0)
0.197
(5.0)
0.210
(5.33)
0.210
(5.33)
0.087
(2.2)
0.087
(2.2)
0.216
(5.5)
1.00
(25.4)
0.689
(17.5)
0.689
(17.5)
LT
±
0.020
(± 0.5)
1.083
(27.5)
1.083
(27.5)
D
1
D
2
p
Nominal Nominal Nominal
t
No
VCS301
VCS331
VCS302
VCS332
0.138
(3.5)
0.138
(3.5)
0.040
(1.0)
0.040
(1.0)
0.040
(1.0)
0.032
(0.8)
0.016
(0.4)
–
FIGURE 2 - POWER DERATING CURVE
–55°C
+100
+25°C
Percent of
Rated Power
+75
+50
+25
0
–50
0
+50
+100
+150
+200
Ambient Temperature
°C
(Further Derating Not Necessary)
SALES
• ISRAEL: foilsales.israel@vishay.com
• FRANCE/SWITZERLAND/SOUTHERN EUROPE: foilsales.eusouth@vishay.com
• AMERICAS: foilsales.usa@vishay.com
• ASIA/JAPAN: foilsales.asia@vishay.com • UK/HOLLAND/SCANDINAVIA: foilsales.eunorth@vishay.com • GERMANY/CZECH REPUBLIC/AUSTRIA: foilsales.eucentral@vishay.com
www.vishay.com
114
For technical questions in the Americas, contact foilsupport1@vishay.com
Document Number: 63018
For technical questions in Asia/Japan/Europe/Africa/Israel, contact foilsupport2@vishay.com
Revision 09-Mar-05
300 Series
Bulk Metal
®
Foil Technology
Precision Current Sensing Resistors
Vishay Foil Resistors
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
Terminal Strength
High Temperature Exposure
Moisture Resistance
Low Temperature Storage
Shock (Specified Pulse)
Vibration (High Frequency)
Load Life (Rated Power, + 25
°
C, 2,000 hrs.)
Resistance Tolerance
Thermal EMF
Weight
Case Temperature Rise
Thermal Resistance
*
∆R’s
plus additional 0.0005 ohm for measurement error.
** All measurements done in free air.
VCS301, VCS302, VCS331, VCS332
PERFORMANCE*
±
25°C
±
150°C
±
15ppm/°C @ 0.005
Ω
(See Table below)
±
0.05%
±
0.02%
THROUGH HOLE
±
0.05%
±
0.05% (2,000 hrs. @ 150°C)
±
0.05%
±
0.05%
±
0.1%
±
0.1%
±
0.05%
0.1%, 0.5%, 1%, 2%, 5%
0.2µV/°C Max. (E Terminals)
8.1 Grams Maximum
17°C/watt** (VCS301, VCS302) – 9°C/watt** (VCS331, VCS332)
8°C/watt** (VCS301, VCS302) – 12.5°C/watt** (VCS331, VCS332)
TABLE 4 - TCR CHART
(0
°
C to + 60
°
C no reference)
≥
0.005Ω
≥
0.01Ω
≥
0.05Ω
≥
0.2Ω
≥
1Ω
≥
10Ω
To
To
To
To
To
< 0.01Ω
< 0.05Ω
< 0.2Ω
< 1Ω
≤
10Ω
±
15ppm/°C
±
10ppm/°C
±
5ppm/°C
±
3ppm/°C
±
2ppm/°C
±
1ppm/°C
SALES
• ISRAEL: foilsales.israel@vishay.com
• FRANCE/SWITZERLAND/SOUTHERN EUROPE: foilsales.eusouth@vishay.com
• AMERICAS: foilsales.usa@vishay.com
• ASIA/JAPAN: foilsales.asia@vishay.com • UK/HOLLAND/SCANDINAVIA: foilsales.eunorth@vishay.com • GERMANY/CZECH REPUBLIC/AUSTRIA: foilsales.eucentral@vishay.com
For technical questions in the Americas, contact foilsupport1@vishay.com
Document Number: 63018
For technical questions in Asia/Japan/Europe/Africa/Israel, contact foilsupport2@vishay.com
Revision 09-Mar-05
www.vishay.com
115
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