VSR Series
Vishay Foil Resistors
Bulk Metal
®
Foil Technology Industrial Precision Resistors
with TCR of ± 4 ppm/°C and Tolerance of ± 0.01 %
FEATURES
•
Temperature coefficient of resistance (TCR)
(1)
:
± 4 ppm/°C (0 °C to + 60 °C)
± 8 ppm/°C (- 55 °C to + 125 °C, + 25 °C ref.)
•
Resistance range: 0.5
Ω
to 1 MΩ (higher or lower
values of resistance are available)
•
Vishay Foil resistors are not restricted to standard values,
we can supply specific “as required” values at no extra cost
or delivery (e.g. 1K2345 vs. 1K)
•
Tolerance: to ± 0.01 % (100 ppm)
•
Load life stability: to ± 0.005 % at 70 °C, 2000 h at rated
power
•
Electrostatic discharge up to 25 000 V
•
Non inductive, non capacitive design
•
Rise time: 1 ns effectively no ringing
•
Current noise: - 40 dB
•
Thermal EMF: 0.05 µV/°C typical
•
Voltage coefficient: < 0.1 ppm/V
•
Inductance: 0.08 µH
•
Matched sets available
•
Terminal finish: lead (Pb)-free
tin/lead alloy
•
Prototype samples available from 72 h. For more
information, please contact foil@vishay.com
•
For better performances please review the
S Series
datasheet
Note
(1)
INTRODUCTION
Bulk Metal
®
Foil technology out performs all other resistor
technologies available today for applications that require
high precision and high stability.
This technology has been pioneered and developed by
VISHAY, and products based on this technology are the
most suitable for a wide range of applications.
Generally Bulk Metal Foil technology allows us to produce
customer orientated products designed to satisfy challenging
and specific technical requirements.
The VSR series of resistors is a low cost version of the well
established S series of resistors. These resistors are made
of foil elements so all of the inherent performance of foil is
retained. They do not however, have the same TCR or
tolerance ranges (see table 1 for details). These products
find a wide range of usage in high end stereo equipment and
some grades of test and measurement equipment.
Standoffs are dimensioned to provide a minimum lead
clearance of 0.010" between the resistor body and the
printed circuit board, when the standoffs are seated on the
board. This allows for proper cleaning after the soldering
process.
Our applications engineering department is available to
advise and to make recommendations for non standard
technical requirements and special applications, please
contact us.
For values below 50
Ω
please contact application engineering
APPLICATIONS
•
•
•
•
•
Industrial
Medical
Audio (high end stereo equipment)
Test and measurement equipment
Precision amplifiers
FIGURE 1 - POWER DERATING CURVE
Percent of Rated Power at + 125 °C
200
%
175
%
150
%
125
%
100
%
75
%
50
%
25
%
0
- 75
FIGURE 2 - TRIMMING TO VALUES
(Conceptual Illustration)
- 55 °C
+ 70 °C
Double Rated Power
Interloop Capacitance
Reduction in Series
Rated Power
Current Path
Before Trimming
Current Path
After Trimming
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing
Resistance
Safe operation
for < 150 ppm
Δ
R after 2000
hours load-life.
Mutual Inductance
Reduction due
to Change in
Current Direction
- 50
- 25
0
+ 25
+ 50
+ 75
+ 100 + 125 + 150 + 175 + 200
Ambient Temperature (°C)
Note:
Foil shown in
black,
etched spaces in
white
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63009
Revision: 23-Mar-10
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
1
VSR Series
Vishay Foil Resistors
FIGURE 3 - IMPRINTING AND DIMENSIONS
Front View
L
VISHA
Y
XXXX
VSR4
Date Code
07
10
Year Week
ST
Model Number
LS
Lead Material #22AWG
Round Solder Coated Copper
SW
LL
Rear View
W
Resistance
Value Code
100R01
0.01
%
Tolerance
H
TABLE 1 - MODEL SELECTION
DIMENSIONS
POWER POWER MAXIMUM
MODEL
RESISTANCE
at
at
WORKING
NUMBER
(Ω)
+ 70 °C + 125 °C VOLTAGE
VSR
VSRJ
(1).
1 to 150K
0.3 W
0.25 W
0.2 W
0.15 W
300
INCHES
mm
MAXIMUM
LOAD LIFE
TEMPERATURE
STABILITY
COEFFICIENT
(MAXIMUM
OF RESISTANCE
ΔR)
(+ 25 °C REF.)
0.05 %
2000 hours
at + 125 °C
0 °C to + 60 °C
± 4 ppm/°C
- 55 °C to + 125 °C
± 8 ppm/°C
TIGHTEST
TOLERANCE %
VS. LOWEST
RESISTANCE
VALUE (Ω)
± 0.01/50
± 0.02/30
± 0.05/5
± 0.1/2
± 0.5/1
up to 100K
over 100K
W: 0.105 ± 0.010
2.67 ± 0.25
L: 0.300 ± 0.010
7.62 ± 0.25
H: 0.326 ± 0.010
8.28 ± 0.25
ST: 0.010 minimum 0.254 minimum
SW: 0.040 ± 0.005
1.02 ± 0.13
LL: 1.000 ± 0.125
25.4 ± 3.18
1)
LS: 0.150 ± 0.005
3.81 ± 0.13
W: 0.160 maximum 4.06 maximum
L: 0.575 maximum 14.61 maximum
H: 0.413 maximum 10.49 maximum
0.89 ± 0.13
ST: 0.035 ± 0.005
1.27 ± 0.13
SW: 0.050 ± 0.005
25.4 ± 3.18
LL: 1.000 ± 0.125
10.16 ± 0.51
LS: 0.400 ± 0.020
W: 0.160 maximum 4.06 maximum
L: 0.820 maximum 20.83 maximum
H: 0.413 maximum 10.49 maximum
0.89 ± 0.13
ST: 0.035 ± 0.005
1.27 ± 0.13
SW: 0.050 ± 0.005
25.4 ± 3.18
LL: 1.000 ± 0.125
16.51 ± 0.51
LS: 0.650 ± 0.020
W: 0.260 maximum 6.60 maximum
L: 1.200 maximum 30.48 maximum
H: 0.413 maximum 10.49 maximum
0.89 ± 0.13
ST: 0.035 ± 0.005
1.27 ± 0.13
SW: 0.050 ± 0.005
25.4 ± 3.18
LL: 1.000 ± 0.125
22.86 ± 0.51
LS: 0.900 ± 0.020
VSR4
1 to 500K
0.5 W
0.25 W
0.4 W
0.2 W
350
up to 200K
over 200K
± 0.005/100
± 0.01/50
± 0.02/30
± 0.05/5
± 0.1/2
± 0.5/1
VSR5
1 to 750K
0.75 W
0.4 W
0.6 W
0.3 W
350
up to 300K
over 300K
VSR6
0.5 to 1M
1.0 W
0.5 W
0.8 W
0.4 W
500
up to 400K
over 400K
Note
(1)
0.200" (5.08 mm) lead spacing available - specify VSRJ.
FIGURE 4 - TEMPERATURE COEFFICIENT OF RESISTANCE
+ 400
+ 200
+ 100
+ 4 ppm/°C
ΔR
R
0
(ppm)
- 100
- 200
- 400
+ 140
- 4 ppm/°C
- 140
0
+ 25
+ 60
Temperature, °C
www.foilresistors.com
2
For any questions, contact:
foil@vishaypg.com
Document Number: 63009
Revision: 23-Mar-10
VSR Series
Vishay Foil Resistors
TABLE 2 - GLOBAL PART NUMBER INFORMATION
NEW GLOBAL PART NUMBER: Y0075100K250A9L (preferred part number format)
DENOTES PRECISION
Y
VALUE
R
=
Ω
K
= kΩ
M =
MΩ
CHARACTERISTICS
(1)
0
= standard
9
= lead (Pb)-free
1 - 999
= custom
Y
0
0
7
5
1
0
0
K
2
5
0
A
9
L
PRODUCT CODE
0075
= VSR
0789
= VSRJ
0020
= VSR4
0021
= VSR5
0022
= VSR6
RESISTANCE TOLERANCE
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
C
= ± 0.25 %
D
= ± 0.5 %
F
= ± 1.0 %
PACKAGING
L
= bulk pack
FOR EXAMPLE: ABOVE GLOBAL ORDER Y0075 100K250 A 9 L:
TYPE: VSR
VALUE: 100.25 kΩ
ABSOLUTE TOLERANCE: ± 0.05 %
TERMINATION: lead (Pb)-free
PACKAGING: bulk pack
HISTORICAL PART NUMBER EXAMPLE: VSRT 100K25 A B (will continue to be used)
VSR
MODEL
VSR
VSRJ
VSR4
VSR5
VSR6
T
TERMINATION
T
= lead (Pb)-free
None = tin/lead alloy
100K25
OHMIC VALUE
100.25 kΩ
A
RESISTANCE
TOLERANCE
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
C
= ± 0.25 %
D
= ± 0.5 %
F
= ± 1.0 %
B
PACKAGING
B
= bulk pack
Note
(1)
For non-standard requests, please contact application engineering.
Document Number: 63009
Revision: 23-Mar-10
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
3
Legal Disclaimer Notice
Vishay Precision Group
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, “Vishay Precision Group”), 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 Vishay Precision Group’s terms and conditions of
purchase, including but not limited to, the warranty expressed therein.
Vishay Precision Group 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, Vishay Precision Group
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 Vishay Precision Group’s knowledge of typical requirements that are often placed on
Vishay Precision Group 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.
No license, express, implied, or otherwise, to any intellectual property rights is granted by this document, or by
any conduct of Vishay Precision Group.
The products shown herein are not designed for use in life-saving or life-sustaining applications unless otherwise
expressly indicated. Customers using or selling Vishay Precision Group products not expressly indicated for use
in such applications do so entirely at their own risk and agree to fully indemnify Vishay Precision Group for any
damages arising or resulting from such use or sale. Please contact authorized Vishay Precision Group 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 No.: 63999
Revision: 27-Apr-11
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1
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