For technical questions, contact: foil@vishaypg.com
FSR (Secondary Standard Foil Resistor)
Vishay Foil Resistors
Document Number: 63223
Revision: 12-Sep-2011
www.vishayfoilresistors.com
1
Bulk Metal® Foil Resistor Standard with TCR of 0.3 ppm/°C,
High Stability and Accuracy for Laboratory Calibration Standards
Direct Plug-In Device for Most DMM’S Available in the Market
INTRODUCTION
A manufacturer of the most precise production-size
resistors available, Vishay Foil Resistors (VFR) has
experienced the problems presented by virtually all
available conventional and specialized secondary
standards. Among these are: instrument accuracy,
resistance shifts caused by load, temperature or
environmental changes, difficulty in measurement of
last digits, limitation on usable frequency, size and ease
of setting.
From intensive analysis of these problems, VFR
has developed a complete new design. With the
unequalled combination of the Bulk Metal® Foil resistor’s
performances, Vishay Foil resistors offer accuracy,
stability and versatility never before combined in a
secondary standard resistor.
The FSR reduces these major problems to insignificance:
accuracy, resistance shift, frequency, and size.
Our Application Engineering department is available to
advise and make recommendations.
For non-standard technical requirements and special
applications, please contact us via email.
Note
(1) Measured by comparison against Vishay Foil Resistor
standards which are traceable to NIST.
FEATURES
•Temperaturecoefcientofresistance(TCR):
To±0.3ppm/°C(+15°Cto+45°C)(seeTable1)
•MaxTCR:10to30ppmwindow(seeFigure3)
•Resistancerange:1Ωto150kΩ(forhigherandlower
values, please contact Applications Engineering)
•Available up to six significant digits (e.g., 9K99962)
•Resistance tolerance available for ordering: to
±0.005% (50 ppm)
•High accuracy: to 10 ppm (see Table 1)
•Stability: ±0.0005% (5 ppm) at 25°C, 12 months
•Nohumidityeffect:resistiveelementhermetically
sealed against moisture
•Smallsizeandrobustconstruction
•Directplug-indeviceformostDMM’savailableinthe
market
•Eachunitissuppliedwithcerticateofaccuracy(1)
•RFshieldedcase
•Fourterminalconstructionswithanadditional
ground socket
•Vishay Foil resistors are not restricted to standard
values; specific “as required” values can be
supplied at no additional cost or delivery time
(e.g., 1K23456 vs. 1K)
•Thermalstabilizationtime<1s(nominalvalueachieved
within 10 ppm of steady state value)
•Electrostaticdischarge(ESD)atleastto25kV
•Risetime:1nseffectivelynoringing
•Currentnoise:0.010μVRMS/Vofappliedvoltage
(<-40dB)
•Voltagecoefcient:0.1ppm/V
•Noninductive:0.08μH
•Nonhotspotdesign
FIGURE 1—DEMONSTRATION FOR EASE OF INSTALLATION ON DMM
For technical questions, contact: foil@vishaypg.com
FSR (Secondary Standard Foil Resistor)
Vishay Foil Resistors
Document Number: 63223
Revision: 12-Sep-2011
www.vishayfoilresistors.com
2
TABLE 1—FSR SPECIFICATIONS(1)
NOMINAL
RESISTANCE
VALUE
(Ω)
RESISTANCE
TOLERANCE(2)
(PPM)
ACCURACY
(PPM)
TYPICAL TCR
(PPM/°C)
+15°C TO +45°C
STABILITY
AT 25°C,
12 MONTHS
(PPM)
MAX.
ALLOWEDPOWER
AT 25°C (3)
(W)
1–9.9 100 50 ±1 50.2
10–49.9 100 10 ±0.6 50.2
50–99.9 50 10 ±0.5 5 0.2
100–150K 50 10 ±0.3 50.2
Note
(1) Each unit supplied is within the specified tolerance of the nominal ordered value. In addition, each unit is marked with the actual
measured value, such actual measured value being within the specified accuracy of the marked value.
(2) For better tolerances, please contact Application Engineering via email below
(3) Maximum voltage for a given resistance value is calculated using V = √PxR
TABLE 2—GENERAL SPECIFICATIONS
SPECIFICATIONS PARAMETERS
Body and Cover Highimpactpolystyrene
Finish Black textured
Weight 45grams
Terminals Nickel Silver
Operating Temperature Range +15°Cto+45°C
FIGURE 2—PHYSICAL DIMENSIONS in Inches (Millimeters)
.75"
==
.75"
==
2.260"
.094"
.785"
.788"
.4375"
.375"
(2.39)
(57.40)
(19.94)
(20.0)
(19.05)
(19.05)
(11.11)
(9.525)
1.510"
(38.354)
Banana Jack
(GROUND)
Banana Plug
APPLICATIONS
In addition to the standard applications for decade boxes
and secondary standards, the FSR greatly extends the
range of usefulness for these instruments due to their high
frequency performance (e.g., R&D, incoming and out-
going inspection stations, quality control, laboratory, etc.).
Vishay Foil Resistors’ secondary standards are used for
adjustable, direct reading resistance and are substitution
components of: RTD, bridge, attenuators, voltage
dividers, multipliers, adjustable feedback resistors
(for use with operational amplifiers), ladder (network)
elements, etc.
For technical questions, contact: foil@vishaypg.com
FSR (Secondary Standard Foil Resistor)
Vishay Foil Resistors
Document Number: 63223
Revision: 12-Sep-2011
www.vishayfoilresistors.com
3
FIGURE 3—TYPICAL TCR CURVES WITHIN
10 PPM WINDOW
10 ppm
Window
Deviation ppm
+15 +20 +25 +30 +35 +40 +50
Temperature (°C)
(+15°C to +45°C): Typical TCR = ±0.3 ppm/°C
+45
FIGURE 4—TRANSIT CASE (OPTIONAL)
FSR device units can be supplied in a protective,
lightweight transit case, shielding the units against
potential damage or exposure to changes in
temperature during transportation. The protective case
can store up to 9 FSR units.
TABLE 3—GLOBAL PART NUMBER INFORMATION (1)
.
SCITSIRETCARAHCEULAVNOISICERP SETONED
RY = Ω
K = kΩ
0 = standard
1 to 999 = custom
PRODUCT CODE (1)GNIGAKCAPECNARELOT ECNATSISER
4028 = FSR V = ±0.005%
T = ±0.01%
I = individual
FOR EXAMPLE: ABOVE GLOBAL ORDER Y4028 09K99962 V 0 I:
TYPE: FSR
VALUE: 9K99962Ω
ABSOLUTE TOLERANCE: ±0.005%
TERMINATION: standard
PACKAGING: individual
HISTORICAL PART NUMBER: FSR 9K99962 VI
IV9K99962FSR
FSR 9K99962Ω V = ± 0.005 %
T = ± 0.01 %
0280 K999Y4 9 I6
MODEL RESISTANCE VALUE TOLERANCE PACKAGING
20V
C = transit case
I = individual
C = transit case
Note
(1) For non-standard requests, please contact Application Engineering
Vishay Precision Group
Document No.: 63999
Revision: 27-Apr-11
www.vishaypg.com
1
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Document No.: 63999
Revision: 27-Apr-11