VCS1625
Vishay Foil Resistors
High Precision Bulk Metal
®
Foil Surface Mount Current
Sensing Chip Resistor with TCR of ± 2 ppm/°C and
Load Life Stability of ± 0.02 %
FEATURES
•
Temperature coefficient of resistance (TCR):
± 2.0 ppm/°C typical (- 55 °C to + 125 °C,
+ 25 °C ref.) (see table 1)
•
Resistance range: 0.01
Ω
to 10
Ω
(for higher or
lower values please contact us)
•
Vishay Foil resistors are not restricted to
standard values, we can supply specific “as required”
values at no extra cost or delivery (e.g. 1.2345
Ω
vs. 1
Ω)
•
Tolerance: to ± 0.1 %
•
Load life stability: ± 0.02 % at 70 °C, 2000 h at rated power
•
Electrostatic discharge (ESD) up to 25 000 V
•
Short time overload
≤
0.005 %
•
Non inductive, non capacitive design
•
Power rating: 0.5 W at + 70 °C (figure 1) or 5 A, whichever
is lower
•
Thermal EMF: 0.05 µV/°C typical
•
Non hot spot design
•
Current noise: < - 40 dB
•
Rise time: 1 ns effectively no ringing
•
Voltage coefficient: < 0.1 ppm/V
•
Non inductive: < 0.08 µH
•
For better performances please review VCS1625Z (Z-foil)
datasheet
INTRODUCTION
Model VCS1625 is a surface mount resistor designed with
4 pads for Kelvin connection. Utilizing Vishay Bulk Metal
®
foil as the resistance element, it provides performance
capabilities far greater than other resistor technologies can
supply in a product of comparable size.
This small device dissipates heat almost entirely through the
pads so surface mount users are encouraged to be generous
with the board’s pads and traces. Gold terminations are
available on special order.
Our application engineering department is available to
advise and to make recommendations. For non standard
technical requirements and special applications, please
contact us.
TERMINATIONS
FIGURE 1 - POWER DERATING CURVE
Percent of Rated Power
- 55 °C
100
75
50
25
0
- 75
(1)
•
Two lead (Pb)-free options are available:
gold plated or tin plated
•
Tin/lead plated
+ 70 °C
APPLICATIONS
•
•
•
•
•
•
•
•
•
•
- 50
- 25
0
+ 25
+ 50
+ 75 + 100 + 125 + 150 + 175
Ambient Temperature (°C)
Note
(1)
Power rating at + 70 °C: 0.5 W on FR4 PCB
Automatic test equipment (ATE)
I
1
Airborne (in heads-up display systems)
High precision instrumentation
R
Electron beam recording equipment
Electron microscopes
I
2
Current sensing applications
Forced balance electronic scales
Applications that require superior frequency stability
Military
Medical
Electrical
Schematic
E
1
E
2
TABLE 1 - TOLERANCE AND TCR VS. RESISTANCE VALUE
(- 55 °C to + 125 °C, + 25° Ref.)
VALUE (Ω)
> 2R000 to 10R000
> 0R500 to 2R000
> 0R100 to 0R500
> 0R050 to 0R100
> 0R030 to 0R050
> 0R010 to 0R030
TOLERANCE
0.2 %, 0.5 %, 1 %
0.5 %, 1 %
1%
1%
1%
1%
TYPICAL TCR
± 2 ppm/°C
± 2 ppm/°C
± 2 ppm/°C
± 2 ppm/°C
± 2 ppm/°C
± 2 ppm/°C
MAXIMUM TCR
± 5 ppm/°C
± 10 ppm/°C
± 15 ppm/°C
± 20 ppm/°C
± 30 ppm/°C
± 50 ppm/°C
* Pb containing materials are not RoHS compliant, exemptions may apply
Document Number: 63023
Revision: 09-Dec-08
For any questions, contact: foil@vishay.com
www.vishay.com
1
VCS1625
Vishay Foil Resistors
FIGURE 2 - DIMENSIONS
in Inches (Millimeters)
Mounting
Pads (4)
I1
0.200
(5.08)
W
0.070
(1.78)
L
A
E1
B
0.070
(1.78)
H
I2
E2
Top View
INCHES
L
H
W
A
B
0.250 ± 0.010
0.160 ± 0.010
0.040 maximum
0.080 ± 0.005
0.040 ± 0.010
0.260
(6.60)
Bottom View
Solder Pad Layout
MILLIMETERS
6.35 ± 0.25
4.06 ± 0.25
1.02 maximum
2.03 ± 0.13
1.02 ± 0.25
FIGURE 1 - TRIMMING TO VALUES
(Conceptual Illustration)
FIGURE 4 - TYPICAL TCR CURVE
+ 150
+ 100
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
+ 50
∆
R
± 2 ppm/°C (+ 25 °C reference)
0
R
(ppm)
- 50
- 100
- 150
- 200
- 50
- 25
0
+ 25
+ 50
+ 75
+ 100
+ 125
Mutual Inductance
Reduction due
to Opposing
Current in
Adjacent Lines
Ambient Temperature (°C)
Note:
Foil shown in
black,
etched spaces in
white
TABLE 2 - PERFORMANCE SPECIFICATIONS
TEST
Thermal Shock 5 x (- 65 °C to + 150 °C)
Low Temperature Operation
Short Time Overload
High Temperature Exposure
Resistance to Soldering Heat
Moisture Resistance
Load Life 2000 h at 70 °C: Rated Power On Ceramic PCB
Note
• Measurement error 0.001R
MIL-PRF-55342
ΔR
LIMITS
± 0.10 %
± 0.10 %
± 0.10 %
± 0.10 %
± 0.2 %
± 0.20 %
± 0.5 %
TYPICAL
ΔR
LIMITS
± 0.005 % (50 ppm)
± 0.005 % (50 ppm)
± 0.005 % (50 ppm)
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.02 % (200 ppm)
MAXIMUM
ΔR
LIMITS
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.02 % (200 ppm)
± 0.02 % (200 ppm)
± 0.03 % (300 ppm)
± 0.03 % (300 ppm)
± 0.04 % (400 ppm)
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For any questions, contact: foil@vishay.com
Document Number: 63023
Revision: 09-Dec-08
VCS1625
Vishay Foil Resistors
TABLE 3 - GLOBAL PART NUMBER INFORMATION
NEW GLOBAL PART NUMBER: Y08501R50500D9L (preferred part number format)
DENOTES PRECISION
Y
VALUE
R
=
Ω
AER
(1)
0
= standard part, tin/lead termination
9
= standard part, lead (Pb)-free termination
129
= gold plated
1 to 999
= custom
Y
0
8
5
0
1
R
5
0
5
0
0
D
9
W
PRODUCT CODE
0850
= VCS1625
RESISTANCE TOLERANCE
B
E
D
F
G
J
K
= ± 0.1 %
= ± 0.2 %
= ± 0.5 %
= ± 1.0 %
= ± 2.0 %
= ± 5.0 %
= ± 10.0 %
PACKAGING
W
= waffle pack
R
= tape and reel
FOR EXAMPLE: ABOVE GLOBAL ORDER Y0850 1R50500 D 9 W:
TYPE: VCS1625
VALUES: 1.505
Ω
ABSOLUTE TOLERANCE: ± 0.5 %
TERMINATION: tin plated (lead (Pb)-free)
PACKAGING: bulk pack
HISTORICAL PART NUMBER: VCS1625 1R5050 TCR2 D S W (will continue to be used)
VCS1625
MODEL
VCS1625
1R50500
OHMIC VALUE
1.505
Ω
TCR2
TEMPERATURE
COEFFICIENT
CHARACTERISTIC
D
RESISTANCE
TOLERANCE
B
E
D
F
G
J
K
= ± 0.1 %
= ± 0.2 %
= ± 0.5 %
= ± 1.0 %
= ± 2.0 %
= ± 5.0 %
= ± 10.0 %
S
TERMINATION
S
= lead (Pb)-free
B
= tin/lead
G
= gold plated
W
PACKAGING
W
= waffle pack
T
= tape and reel
Note
(1)
For non-standard requests or additional values, please contact application engineering.
Document Number: 63023
Revision: 09-Dec-08
For any questions, contact: foil@vishay.com
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
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