VSA101 (Z-Foil)
Vishay Foil Resistors
Ultra High Precision Axial Z-Foil Resistor with
TCR of ± 0.05 ppm/°C, PCR of 5 ppm at Rated Power,
Tolerance of ± 0.005 % and Load Life Stability of ± 0.005 %
INDUSTRY BREAKTHROUGH
Temperature coefficient of resistance (TCR):
± 0.05 ppm/°C typical (0 °C to + 60 °C)
± 0.2 ppm/°C typical (- 55 °C to + 125 °C,
+ 25 °C ref.)
Power coefficient of resistance “R due to
self heating”: ± 5 ppm at rated power
Rated power: 0.6 W at 70 °C; 0.3 W at 125 °C
Resistance tolerance: to ± 0.005 %
Load life stability: to ± 0.005 % at 70 °C, 2000 h at rated
power
Resistance range: 5
to 100 k
Vishay Foil resistors are not restricted to standard values,
we can supply specific “as required” values at no extra cost
or delivery (e.g. 100.1234
vs. 100
)
Electrostatic discharge (ESD) up to 25 000 V
Non inductive, non capacitive design
Rise time: 1.0 ns effectively no ringing
Current noise:
- 40 dB
Thermal EMF: 0.1 µV/°C maximum; 0.05 µV/°C typical
Voltage coefficient: < 0.1 ppm/V
Non inductive: 0.08 µH
Terminal finishes available: lead (Pb)-free
tin/lead alloy
Maximum working voltage: 300 V
Matched sets are available per request
For better performances please contact us
Testing available per EEE-INST002
FEATURES
INTRODUCTION
The VSA101 Axial Bulk Metal
®
Z-foil resistor is Vishay’s
answer to the industry’s demand for ultra-high precision
resistors with axial terminations.
The Z-foil technology provides a significant reduction of the
resistive component’s sensitivity to ambient temperature
variations (TCR) and applied power changes (PCR). This,
along with all the additional Z-foil benefits presented in the
features section, allows designers to guarantee the highest
degree of stability and accuracy in fixed-resistor applications
using solutions based on Vishay’s revolutionary Z-foil
technology.
Our application engineering department is available to
advise and to make recommendations. For non-standard
technical requirements and special applications, please
contact us.
APPLICATIONS
Precision amplifiers, high precision instrumentation,
medical and automatic test equipment
Laboratory, audio (high end stereo equipment)
EB applications, military, airborne and space
Down-hole (high temperature)
TABLE 1 - TOLERANCE AND TCR VS.
RESISTANCE
VALUE
STANDARD
TOLERANCE
TYPICAL TCR AND
MAXIMUM SPREAD
- 55 °C TO + 125 °C
(+ 25 °C REF.)
± 0.2 ± 1.3 ppm/°C
± 0.2 ± 1.5 ppm/°C
± 0.2 ± 1.8 ppm/°C
± 0.2 ± 2.3 ppm/°C
± 0.2 ± 2.8 ppm/°C
FIGURE 1 - POWER DERATING CURVE
200
%
- 55 °C
+ 70 °C
Percent of Rated Power at + 125 °C
Double Rated Power
175
%
150
%
125
%
100
%
75
%
50
%
25
%
0
- 75 - 50 - 25
100
to 100 k
80
to < 100
50
to < 80
10
to < 50
5
to < 10
± 0.005 %
± 0.005 %
± 0.01 %
± 0.02 %
± 0.02 %
Rated Power
0
+ 25 + 50 + 75 + 100 + 125 + 150 + 175 + 200
Ambient Temperature (°C)
* Pb containing terminations are RoHS compliant, exemptions may apply
Document Number: 63143
Revision: 26-Mar-10
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
1
VSA101 (Z-Foil)
Vishay Foil Resistors
FIGURE 2 - TRIMMING TO VALUES
(Conceptual Illustration)
FIGURE 3 - TYPICAL TCR CURVE Z-FOIL
+ 500
+ 400
+ 300
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
+ 200
+ 100
ΔR
0
R
(ppm)
- 100
- 200
- 300
- 400
- 500
- 55
- 25
0
+ 25
+ 60 + 75
+ 100 + 125
- 0.16 ppm/°C
0.05 ppm/°C
- 0.1 ppm/°C
0.1 ppm/°C
0.14 ppm/°C
0.2 ppm/°C
Mutual Inductance
Reduction due
to Opposing
Current in
Adjacent Lines
Ambient Temperature (°C)
Note:
Foil shown in
black,
etched spaces in
white
FIGURE 4 - STANDARD IMPRINTING AND DIMENSIONS
A
T
Date Code
08
06
Year
Week
VISHAY
0806
VSA101
H
10K010
0.01
%
Resistance
Value
Tolerance
D
C
BODY
A - LENGTH (MAX.)
Inch
0.305
mm
7.75
T - WIDTH (MAX.)
Inch
0.102
mm
2.59
H - HEIGHT (MAX.)
Inch
0.26
mm
6.60
C - LENGTH (MIN.)
Inch
1.5
mm
38.10
LEAD
D - DIAMETER
Inch
0.025
mm
0.64
TABLE 2 - VSA101 SPECIFICATIONS
Stability
± 0.005 % max.
R
at 0.1 W/+ 70 °C
Load life at 2000 h
± 0.015 % max.
R
at 0.3 W/+ 125 °C
± 0.01 % max.
R
at 0.05 W/+ 125 °C
Load life at 10 000 h
± 0.05 % max.
R
at 0.3 W/+ 125 °C
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For any questions, contact:
foil@vishaypg.com
Document Number: 63143
Revision: 26-Mar-10
VSA101 (Z-Foil)
Vishay Foil Resistors
TABLE 3 - ENVIRONMENTAL PERFORMANCE COMPARISON
MIL-PRF-55182
CHAR J
Test Group I
Thermal shock
Short time overload
Test Group II
Resistance temperature
Characteristic
Low temperature storage
Low temperature operation
Terminal strength
Test Group III
DWV
Resistance to solder heat
Moisture resistance
Test Group IV
Shock
Vibration
Test Group V
Life test at 0.3 W/+ 125 °C
2000 h
10 000 h
Test Group Va
Life test at 0.6 W (2 x rated power)/+ 70 °C, 2000 h
Test Group VI
High temperature exposure
Test Group VII
Voltage coefficient
VISHAY VSA101
MAXIMUM
R
TYPICAL
R
± 0.2 %
± 0.2 %
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.002 % (20 ppm)
± 0.003 % (30 ppm)
± 25 ppm/°C
± 0.15 %
± 0.15 %
± 0.2 %
see Table 1
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.05 ppm/°C
(0 °C to + 60 °C)
± 0.002 % (20 ppm)
± 0.002 % (20 ppm)
± 0.002 % (20 ppm)
± 0.15 %
± 0.1 %
± 0.4 %
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.05 % (500 ppm)
± 0.002 % (20 ppm)
± 0.005 % (50 ppm)
± 0.01 % (100 ppm)
± 0.2 %
± 0.2 %
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.002 % (20 ppm)
± 0.002 % (20 ppm)
± 0.5 %
± 2.0 %
± 0.015 % (150 ppm)
± 0.05 % (500 ppm)
± 0.01 % (100 ppm)
± 0.03 % (300 ppm)
± 0.5 %
± 0.015 % (150 ppm)
± 0.01 % (100 ppm)
± 2.0 %
± 0.1 % (1000 ppm)
± 0.05 % (500 ppm)
0.005 %/V
< 0.00001 %/V
< 0.00001 %/V
STANDARD MEASUREMENT
(at room temperature)
Standard Test Conditions:
Temperature: + 23 °C ± 2 °C
Relative humidity: 35 to 65 % RH
Lead test point: 0.5" (12.7 mm) from resistor body
IMPROVED PERFORMANCE TESTING
The preceding information is based on product directly off the production line. Improved performance (meaning increased time
stability with load and other stresses) is available through factory conducted “Improved Performance Testing”. The test routine
is usually tailored to the user’s stability objectives. A screened product can be brought down to a potential load life drift of less
than 50 ppm.
For example, the data sheet “7 Technical Reasons to Specify BMF Resistive Components” shows the drift characteristics of a
standard product.
Various screen test routines are available and all anticipated stresses must be taken into account before settling on one specific
test routine. Our Applications Engineering Department is available to discuss and recommend appropriate routines given the full
spectrum of anticipated stresses and stability requirements.
Document Number: 63143
Revision: 26-Mar-10
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
3
VSA101 (Z-Foil)
Vishay Foil Resistors
TABLE 4 - GLOBAL PART NUMBER INFORMATION
NEW GLOBAL PART NUMBER: Y0098250R000V9L (preferred part number format)
DENOTES PRECISION
Y
VALUE
R
=
K
= k
AER*
0
= standard part, tin/lead termination
9
= standard part, lead (Pb)-free termination
Other
= custom
Y
0
0
9
8
2
5
0
R
0
0
0
V
9
L
PRODUCT CODE
0098
= VSA101
RESISTANCE TOLERANCE
V
= ± 0.005 %
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 Y0098 250R000 V 9 L:
TYPE: VSA101
VALUE: 250.0
ABSOLUTE TOLERANCE: ± 0.005 %
TERMINATION: lead (Pb)-free
PACKAGING: bulk pack
HISTORICAL PART NUMBER: VSA101 T 250R00 V B (will continue to be used)
VSA101
MODEL
VSA101
T
TERMINATION
T
= lead (Pb)-free
None = tin/lead alloy
250R00
RESISTANCE VALUE
250R00
= 250.00
5K2310
= 5.231 k
V
TOLERANCE
V
= ± 0.005 %
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
* Application engineering release: for non-standard requests, please contact application engineering.
www.foilresistors.com
4
For any questions, contact:
foil@vishaypg.com
Document Number: 63143
Revision: 26-Mar-10
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
www.vishaypg.com
1
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