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Vishay Siliconix |
VSR Series
Vishay Foil Resistors
Bulk Metal® Foil Technology Industrial Precision Resistors
with TCR of ± 4 ppm/°C and Tolerance of ± 0.01 %
Any value at any tolerance available with resistance range
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 inches 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.
FIGURE 1 - POWER DERATING CURVE
- 55 °C
200 %
175 %
+ 70 °C
Double Rated Power
150 %
125 %
100 %
Rated Power
75 %
50 %
25 %
Safe operation
for < 150 ppm
∆R after 2000
hours load-life.
0
- 75 - 50 - 25
0 + 25 + 50 + 75 + 100 + 125 + 150 + 175 + 200
Ambient Temperature (°C)
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.)
Pb-free
Available
• Resistance Range: 0.5 Ω to 1 MΩ (higher or RoHS*
lower values of resistance are available)
COMPLIANT
• Resistance Tolerance: to ± 0.01 %
• Load Life Stability: to ± 0.005 % at 70 °C, 2000 hours at
rated power
• Electrostatic Discharge above 25 000 V
• Non Inductive, Non Capacitive Design
• Rise time: 1 ns without 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 Finishes Available: Lead (Pb)-free
Tin/Lead Alloy
• Any value available within resistance range (e.g. 1K234)
• Prototype samples available from 48 hours. For more
information, please contact [email protected]
• For better performances please review the S Series
datasheet
Note
1. For values below 50 Ω please contact Application Engineering
APPLICATIONS
• Industrial
• Medical
• Audio (high end stereo equipment)
• Test and Measurement equipment
• Precision Amplifiers
FIGURE 2 - TRIMMING TO VALUES
(Conceptual Illustration)
Interloop Capacitance
Reduction in Series
Mutual Inductance
Reduction due
to Change in
Current Direction
Current Path
Before Trimming
Current Path
After Trimming
Trimming Process
Removes this Material
from Shorting Strip Area
Changing Current Path
and Increasing
Resistance
Note: Foil shown in black, etched spaces in white
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63009
Revision: 16-Jul-07
For any questions, contact: [email protected]
www.vishay.com
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VSR Series
Vishay Foil Resistors Bulk Metal® Foil Technology Industrial Precision Resistors
with TCR of ± 4 ppm/°C and Tolerance of ± 0.01 %
FIGURE 3 - IMPRINTING AND DIMENSIONS
Front View
L
Date Code
VISHAY 07 10
H XXXX Year Week
VSR4
W
ST
Model Number
LS
Lead Material #22AWG
Round Solder Coated Copper
Rear View
100R01
0.01 %
Resistance
Value Code
Tolerance
SW LL
TABLE 1 - MODEL SELECTION
MODEL
NUMBER
RESISTANCE
(Ω)
POWER
at
+ 70 °C
POWER
at
+ 125 °C
MAXIMUM
WORKING
VOLTAGE
DIMENSIONS
INCHES
mm
VSR
VSRJ1).
1 to 150K
0.3 W 0.2 W
up to 100K
0.25 W 0.15 W
over 100K
300 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
LS: 0.150 ± 0.0051) 3.81 ± 0.13
LOAD LIFE
STABILITY
(MAXIMUM
ΔR)
MAXIMUM
TEMPERATURE
COEFFICIENT
OF RESISTANCE
(+ 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)
± 0.01/25
± 0.02/12
± 0.05/5
± 0.1/2
± 0.25/2
± 0.5/1
± 1/1
VSR4
VSR5
VSR6
1 to 500K
0.5 W 0.4 W
up to 200K
0.25 W 0.2 W
over 200K
1 to 750K
0.75 W 0.6 W
up to 300K
0.4 W 0.3 W
over 300K
0.5 to 1M
1.0 W 0.8 W
up to 400K
0.5 W 0.4 W
over 400K
350 W: 0.160 Maximum 4.06 Maximum
L: 0.575 Maximum 14.61 Maximum
H: 0.413 Maximum 10.49 Maximum
ST: 0.035 ± 0.005 0.89 ± 0.13
SW: 0.050 ± 0.005 1.27 ± 0.13
LL: 1.000 ± 0.125 25.4 ± 3.18
LS: 0.400 ± 0.020 10.16 ± 0.51
350 W: 0.160 Maximum 4.06 Maximum
L: 0.820 Maximum 20.83 Maximum
H: 0.413 Maximum 10.49 Maximum
ST: 0.035 ± 0.005 0.89 ± 0.13
SW: 0.050 ± 0.005 1.27 ± 0.13
LL: 1.000 ± 0.125 25.4 ± 3.18
LS: 0.650 ± 0.020 16.51 ± 0.51
500 W: 0.260 Maximum 6.60 Maximum
L: 1.200 Maximum 30.48 Maximum
H: 0.413 Maximum 10.49 Maximum
ST: 0.035 ± 0.005 0.89 ± 0.13
SW: 0.050 ± 0.005 1.27 ± 0.13
LL: 1.000 ± 0.125 25.4 ± 3.18
LS: 0.900 ± 0.020 22.86 ± 0.51
± 0.005/30
± 0.01/20
± 0.02/10
± 0.05/5
± 0.1/1
± 0.25/1
± 0.5/1
± 1/1
Note
1. 0.200 inches (5.08 mm) lead spacing available - specify VSRJ.
FIGURE 4 - TEMPERATURE COEFFICIENT OF RESISTANCE
+ 400
+ 200
ΔR + 100
R0
(ppm) - 100
- 200
+ 4 ppm/°C
+ 140
- 4 ppm/°C
- 140
- 400
0
+ 25
Temperature, °C
+ 60
www.vishay.com
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For any questions, contact: [email protected]
Document Number: 63009
Revision: 16-Jul-07
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