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
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.
• 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
TERMINATIONS
Percent of Rated Power
FIGURE 1 - POWER DERATING CURVE
(1)
• Two lead (Pb)-free options are available:
gold plated or tin plated
• Tin/lead plated
+ 70 °C
- 55 °C
100
APPLICATIONS
75
50
25
0
- 75
- 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
•
•
•
•
•
•
•
•
•
•
Electrical
Schematic
Automatic test equipment (ATE)
I1
E1
Airborne (in heads-up display systems)
High precision instrumentation
R
Electron beam recording equipment
Electron microscopes
E2
I2
Current sensing applications
Forced balance electronic scales
Applications that require superior frequency stability
Military
Medical
TABLE 1 - TOLERANCE AND TCR VS. RESISTANCE VALUE (- 55 °C to + 125 °C, + 25° Ref.)
VALUE (Ω)
TOLERANCE
TYPICAL TCR
> 2R000 to 10R000
0.2 %, 0.5 %, 1 %
± 2 ppm/°C
MAXIMUM TCR
± 5 ppm/°C
> 0R500 to 2R000
0.5 %, 1 %
± 2 ppm/°C
± 10 ppm/°C
> 0R100 to 0R500
1%
± 2 ppm/°C
± 15 ppm/°C
> 0R050 to 0R100
1%
± 2 ppm/°C
± 20 ppm/°C
> 0R030 to 0R050
1%
± 2 ppm/°C
± 30 ppm/°C
> 0R010 to 0R030
1%
± 2 ppm/°C
± 50 ppm/°C
* Pb containing materials are not RoHS compliant, exemptions may apply
Document Number: 63023
Revision: 23-Mar-10
For any questions, contact: foil@vishaypg.com
www.foilresistors.com
1
VCS1625
Vishay Foil Resistors
Mounting
Pads (4)
W
A
I1
E1
I2
E2
0.200
(5.08)
L
B
0.070
(1.78)
FIGURE 2 - DIMENSIONS in Inches (Millimeters)
0.070
(1.78)
H
Top View
0.260
(6.60)
Bottom View
Solder Pad Layout
INCHES
MILLIMETERS
L
0.250 ± 0.010
6.35 ± 0.25
H
0.160 ± 0.010
4.06 ± 0.25
W
0.040 maximum
1.02 maximum
A
0.080 ± 0.005
2.03 ± 0.13
B
0.040 ± 0.010
1.02 ± 0.25
FIGURE 1 - TRIMMING TO VALUES
(Conceptual Illustration)
FIGURE 4 - TYPICAL TCR CURVE
+ 150
+ 100
Current Path
Before Trimming
Interloop Capacitance
Reduction in Series
Current Path
After Trimming
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing
Resistance
Mutual Inductance
Reduction due
to Opposing
Current in
Adjacent Lines
+ 50
∆R
± 2 ppm/°C (+ 25 °C reference)
0
R
(ppm) - 50
- 100
- 150
- 200
- 50
- 25
0
+ 25
+ 50
+ 75
+ 100
+ 125
Ambient Temperature (°C)
Note: Foil shown in black, etched spaces in white
TABLE 2 - PERFORMANCE SPECIFICATIONS
MIL-PRF-55342
ΔR LIMITS
TYPICAL
ΔR LIMITS
MAXIMUM
ΔR LIMITS
Thermal Shock 5 x (- 65 °C to + 150 °C)
± 0.10 %
± 0.005 % (50 ppm)
± 0.01 % (100 ppm)
Low Temperature Operation
± 0.10 %
± 0.005 % (50 ppm)
± 0.01 % (100 ppm)
Short Time Overload
± 0.10 %
± 0.005 % (50 ppm)
± 0.02 % (200 ppm)
High Temperature Exposure
± 0.10 %
± 0.01 % (100 ppm)
± 0.02 % (200 ppm)
Resistance to Soldering Heat
± 0.2 %
± 0.01 % (100 ppm)
± 0.03 % (300 ppm)
Moisture Resistance
± 0.20 %
± 0.01 % (100 ppm)
± 0.03 % (300 ppm)
Load Life 2000 h at 70 °C: Rated Power On Ceramic PCB
± 0.5 %
± 0.02 % (200 ppm)
± 0.04 % (400 ppm)
TEST
Note
• Measurement error 0.001R
www.foilresistors.com
2
For any questions, contact: foil@vishaypg.com
Document Number: 63023
Revision: 23-Mar-10
VCS1625
Vishay Foil Resistors
TABLE 3 - GLOBAL PART NUMBER INFORMATION
NEW GLOBAL PART NUMBER: Y08501R50500D9L (preferred part number format)
DENOTES PRECISION
VALUE
AER (1)
Y
R=Ω
0 = standard part, tin/lead termination
9 = standard part, lead (Pb)-free termination
129 = gold plated
1 to 999 = custom
Y
0
8
5
PRODUCT CODE
0
1
R
5
0
5
0
0
D
RESISTANCE TOLERANCE
0850 = VCS1625
B
E
D
F
G
J
K
9
W
PACKAGING
W = waffle pack
R = tape and reel
= ± 0.1 %
= ± 0.2 %
= ± 0.5 %
= ± 1.0 %
= ± 2.0 %
= ± 5.0 %
= ± 10.0 %
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
1R50500
TCR2
D
S
W
MODEL
OHMIC VALUE
TEMPERATURE
COEFFICIENT
CHARACTERISTIC
RESISTANCE
TOLERANCE
TERMINATION
PACKAGING
VCS1625
1.505 Ω
S = lead (Pb)-free
B = tin/lead
G = gold plated
W = waffle pack
T = tape and reel
B
E
D
F
G
J
K
= ± 0.1 %
= ± 0.2 %
= ± 0.5 %
= ± 1.0 %
= ± 2.0 %
= ± 5.0 %
= ± 10.0 %
Note
(1) For non-standard requests or additional values, please contact application engineering.
Document Number: 63023
Revision: 23-Mar-10
For any questions, contact: foil@vishaypg.com
www.foilresistors.com
3
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
conduct of VPG.
The products shown herein are not designed for use in life-saving or life-sustaining applications unless otherwise
expressly indicated. Customers using or selling VPG products not expressly indicated for use in such applications do
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
www.vpgsensors.com
1