VCS1625P
Vishay Foil Resistors
High Precision Surface Mount Current Sensing Chip Resistor with Power
Rating to 1 W, Temperature Coefficient of Resistance of
:
± 2 ppm/°C and Load Life Stability of ±0.015%
FEATURES
NEW
INTRODUCTION
Model VCS1625P is a surface mount resistor designed with
4 pads for Kelvin connection. Utilizing VFR’s (Vishay Foil
Resistors’) 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.
The key performance of the new VCS1625P is its high rated
power up to 1W. 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.
The four terminal device separates the current leads from the
voltage sensing leads. This configuration eliminates the
effect of the lead wire resistance from points A to B and
C to D, allowing low TCR current sensing.
VFR’s application engineering department is available to
advise and to make recommendations. For non-standard
technical requirements and special applications, please
contact
foil@vishaypg.com.
Temperature coefficient of resistance (TCR):
± 2 ppm/°C typical (- 55 °C to + 125 °C,
+ 25 °C ref.) (see table 1)
Resistance range: 0.01
to 10
(for
higher
or lower values, please contact Application
Engineering)
Vishay Foil resistors are not restricted to standard values,
we can supply specific “as required” values at no extra cost
or delivery (e.g. 1.234
vs. 1
)
Resistance tolerance: to ± 0.2% (0.05% is also available)
Load life stability: 0.015 % at 70 °C, 2000 h at rated power
Thermal EMF: 0.05 µV/°C typical
Electrostatic discharge (ESD) at least to 25 kV
Short time overload < 0.005 %
Thermal stabilization time < 1 s (nominal value achieved
within 10 ppm of steady state value)
Power rating: to 1 W at + 70 °C (Figure 1)
Non inductive: non capacitive design
Rise time: 1 ns effectively no ringing
Current rating: 5 A maximum
Current noise: 0.010 µV
RMS
/V of applied voltage
(< - 40 dB)
Voltage coefficient: < 0.1 ppm/V
Non inductive: < 0.08 µH
Non hot spot design
Prototype quantities available in just 5 working days or
sooner
For better performances, please review the VCS1625ZP
(Z-Foil) datasheet
B
I
A
Z
in
R
C
I
D
TERMINATIONS
Two lead (Pb)-free options are available:
gold plated or tin plated
Tin/lead plated
FIGURE 1 - POWER DERATING CURVE
Percent of Rated Power
- 55 °C
100
75
50
25
0
- 75
~
∞
=
V
+ 70 °C
- 50
- 25
0
+ 25
+ 50
+ 75 + 100 + 125 + 150 + 175
Ambient Temperature (°C)
* Pb containing materials are not RoHS compliant, exemptions may apply
Document Number: 63216
Revision: 28-Aug-12
For any questions, contact:
foil@vishaypg.com
www.vishayfoilresistors.com
1
VCS1625P
Vishay Foil Resistors
TABLE 1 - TOLERANCE AND TCR VS. RESISTANCE VALUE
(- 55 °C to + 125 °C, + 25° Ref.)
(1)
VALUE ()
> 2R000 to 10R000
> 0R500 to 2R000
> 0R100 to 0R500
> 0R050 to 0R100
> 0R030 to 0R050
> 0R010 to 0R030
Notes
(1)
Tighter
(2)
(3)
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
POWER RATING
at + 70 °C
(2)
MAXIMUM
CURRENT
(2)
1 W
(3)
5A
performances are available. Please contact application engineering foil@vishaypg.com
Max Power or Max Current - whichever is lower
On FR4 PCB with solder pads per fig 2
FIGURE 2 - DIMENSIONS
in Inches (Millimeters)
Solder Pad Layout
2 oz. Copper (70 Microns)
Coated by Solder mask
L
W
0.806 (20.47)
0.020 (0.51)
4 Mounting
A
Pads
(1)
0.200 (5.08)
I1
E1
0.070 (1.78)
Electrical
Schematic
0.806 (20.47)
0.020 (0.51)
I
1
R
I
2
E
2
E
1
B
H
I2
E2
Top View
Bottom View
Solder Coated Pads
(Windows in Solder Mask)
0.070 (1.78)
0.260 (6.60)
Note
(1)
I and E mounting pads are interchangeable
INCHES
L
H
W
A
B
MILLIMETERS
6.35 ± 0.25
4.06 ± 0.25
1.02 maximum
2.03 ± 0.13
1.02 ± 0.25
0.250 ± 0.010
0.160 ± 0.010
0.040 maximum
0.080 ± 0.005
0.040 ± 0.010
FIGURE 3 - TRIMMING TO VALUES
(Conceptual Illustration)*
FIGURE 4 - TYPICAL RESISTANCE
VERSUS TEMPERATURE
CURVE AND ITS CHORD
SLOPES (TCR)
+ 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
+ 100
+ 50
± 2 ppm/°C (+ 25 °C reference)
Mutual Inductance
Reduction due
to Opposing
Current in
Adjacent Lines
Δ
R
0
R
(ppm)
- 50
- 100
Note:
Foil shown in black, etched spaces in white
* To acquire a precision resistance value, the Bulk Metal
®
Foil chip is trimmed by
selectively removing built-in “shorting bars.” To increase the resistance in known
increments, marked areas are cut, producing progressively smaller increases in
resistance. This method eliminates the effect of “hot spot” and improves the long term
stability of the Foil chips.
- 150
- 200
- 50
- 25
0
+ 25
+ 50
+ 75
+ 100
+ 125
Ambient Temperature (°C)
www.vishayfoilresistors.com
2
For any questions, contact:
foil@vishaypg.com
Document Number: 63216
Revision: 28-Aug-12
VCS1625P
Vishay Foil Resistors
TABLE 2 - PERFORMANCE SPECIFICATIONS
TEST
Thermal shock 5 x (- 65 °C to + 150 °C)
Low temperature operation, - 65 °C, 45 min at P
nom
Short time overload, 6.25 x rated power, 5 s
High temperature exposure, + 150 °C, 100 h
Resistance to soldering heat
Moisture resistance
Load life stability 2000 h at 70 °C at 1 W
Note
(1)
Measurement error 0.001R
MIL-PRF-55342
R
LIMITS
± 0.10 %
± 0.10 %
± 0.10 %
± 0.10 %
± 0.2 %
± 0.2 %
± 0.5 %
TYPICAL
R
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)
± 0.015 % (150 ppm)
MAXIMUM
R
LIMITS
(1)
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.02 % (200 ppm)
± 0.02 % (200 ppm)
± 0.03 % (300 ppm)
± 0.03 % (300 ppm)
± 0.025 % (250 ppm)
POST MANUFACTURING OPERATIONS OR PMO
Military applications can include requirements for
performance under conditions of stress beyond the normal
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 Foil
resistors. They stabilize Foil resistors while they are harmful
to other types. Short time overload, accelerated load life, and
temperature cycling are the three PMO exercises that do the
most to remove the anomalies down the road. Foil resistors
are inherently stable as manufactured. These PMO
exercises are only of value on foil resistors and they improve
the performance by small but significant amounts. Users are
encouraged to contact VFR’s application engineering
department for assistance in choosing the PMO operations
that are right for their application.
Document Number: 63216
Revision: 28-Aug-12
For any questions, contact:
foil@vishaypg.com
www.vishayfoilresistors.com
3
VCS1625P
Vishay Foil Resistors
TABLE 3 - GLOBAL PART NUMBER INFORMATION
NEW GLOBAL PART NUMBER: Y08561R50000D9W (preferred part number format)
DENOTES PRECISION
Y
VALUE
R
=
CHARACTERISTICS
(1)
0
= standard part, tin/lead termination
9
= standard part, lead (Pb)-free termination
129
= standard part, gold plated
Other
= custom
Y
0
8
5
6
1
R
5
0
0
0
0
D
9
W
PRODUCT CODE
0856
= VCS1625P
RESISTANCE TOLERANCE
A
= ± 0.05 %
B
= ± 0.1 %
E
= ± 0.2 %
D
= ± 0.5 %
F
= ± 1.0 %
G
= ± 2.0 %
J
= ± 5.0 %
PACKAGING
R
= tape and reel
W
= waffle pack
FOR EXAMPLE: ABOVE GLOBAL ORDER Y0856 1R50000 D 9 W:
TYPE: VCS1625P
VALUE: 1.5
ABSOLUTE TOLERANCE: ± 0.5 %
TERMINATION: lead (Pb)-free
PACKAGING: waffle pack
HISTORICAL PART NUMBER: VCS1625P 1R5000 TCR2 D S W (will continue to be used)
VCS1625P
MODEL
VCS1625P
1R5000
OHMIC VALUE
1.5
TCR2
TCR
Characteristic
D
RESISTANCE
TOLERANCE
A
= ± 0.05 %
B
= ± 0.1 %
E
= ± 0.2 %
D
= ± 0.5 %
F
= ± 1.0 %
G
= ± 2.0 %
J
= ± 5.0 %
S
TERMINATION
S
= lead (Pb)-free
B
= tin/lead
G
= gold plated
W
PACKAGING
T
= tape and reel
W
= waffle pack
Note
(1)
Application engineering release: for non-standard requests, please contact application engineering.
www.vishayfoilresistors.com
4
For any questions, contact:
foil@vishaypg.com
Document Number: 63216
Revision: 28-Aug-12
Legal Disclaimer Notice
Vishay Precision Group, Inc.
Disclaimer
ALL PRODUCTS, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE.
Vishay Precision Group, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf
(collectively, “VPG”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein or in
any other disclosure relating to any product.
The product specifications do not expand or otherwise modify VPG’s terms and conditions of purchase, including but
not limited to, the warranty expressed therein.
VPG makes no warranty, representation or guarantee other than as set forth in the terms and conditions of purchase.
To the maximum extent permitted by applicable law, VPG disclaims (i) any and all liability arising out of the
application or use of any product, (ii) any and all liability, including without limitation special, consequential or
incidental damages, and (iii) any and all implied warranties, including warranties of fitness for particular purpose,
non-infringement and merchantability.
Information provided in datasheets and/or specifications may vary from actual results in different applications and
performance may vary over time. Statements regarding the suitability of products for certain types of applications
are based on VPG’s knowledge of typical requirements that are often placed on VPG products. It is the customer’s
responsibility to validate that a particular product with the properties described in the product specification is suitable for
use in a particular application. You should ensure you have the current version of the relevant information by contacting
VPG prior to performing installation or use of the product, such as on our website at vpgsensors.com.
No license, express, implied, or otherwise, to any intellectual property rights is granted by this document, or by any
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The products shown herein are not designed for use in life-saving or life-sustaining applications unless otherwise
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so entirely at their own risk and agree to fully indemnify VPG for any damages arising or resulting from such use or sale.
Please contact authorized VPG 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.
Copyright Vishay Precision Group, Inc., 2014. All rights reserved.
Document No.: 63999
Revision: 15-Jul-2014
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