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
∆
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: 08-Jan-09
For any questions, contact: foil@vishay.com
www.vishay.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
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2
For any questions, contact: foil@vishay.com
Document Number: 63009
Revision: 08-Jan-09
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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1
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