SMR1D/SMR3D
Vishay Foil Resistors
High Precision Bulk Metal
®
Foil Molded Surface Mount Resistor
with TCR down to ± 2 ppm/°C, Flexible Terminations,
and Load Life Stability of ± 0.005 % (50 ppm)
FEATURES
•
Temperature coefficient of resistance (TCR):
± 2 ppm°C typical (- 55 °C to + 125 °C,
Pb-free
+ 25 °C ref.)
Available
•
Tolerance: to ± 0.01 %
RoHS*
•
Flexible terminations ensure minimal stress
COMPLIANT
transference from the PCB due to a difference
in thermal coefficient of expansions (TCE)
•
Electrostatic discharge (ESD) above 25 000 V
•
Load life stability: ± 0.005 % (70 °C, 2000 h at rated power)
•
Resistance range: 5
Ω
to 80 kΩ (for higher and lower
values, please contact us)
•
Power rating: to 600 mW at 70 °C
•
Non inductive, non capacitive design
•
Current noise: - 40 dB
•
Voltage coefficient: < 0.1 ppm/V
•
Non inductive: < 0.08 µH
•
Non hot spot design
•
Terminal finishes available: lead (Pb)-free
tin/lead alloy
•
Matched sets with TCR tracking are available upon request
•
Any value available within resistance range (e.g. 1K234)
•
Prototype samples available from 48 h. For more
information, please contact foil@vishay.com
•
For better performances please review SMRxDZ datasheet
Any value at any tolerance available within resistance range
INTRODUCTION
The SMRxD is a precision molded surface mountable
resistor offering all the elements of precision; including low
TCR, tight tolerance, long term stability, low noise, low
thermal EMF, and non-measurable voltage coefficient. It
utilizes the Bulk Metal
®
Foil technology for the resistive
element with its inherent low and predictable TCR and long
term stability. This surface mountable product affords similar
performance to the time tested S series molded through-hole
product.
The flexible terminations of this product also reduce
stress transference from the PCB to the resistor.
Voltage division with tight tracking < 3 ppm/°C can be
achieved with 2
randomly
selected units even with a large
ratio between the two values.
Our Application Engineering Department is available to
advise and make recommendations. For non-standard
technical requirements and special applications, please
contact us.
APPLICATIONS
•
•
•
•
•
•
•
Military, airborne and space
Precision amplifiers
High precision instrumentation
Medical
Automatic test equipment (ATE)
Industrial
Audio (high end stereo
V
in
equipment)
•
EB application
•
Pulse application
•
Measurement instrumentation
TABLE 1 - THE SMRxD SERIES IS LISTED
IN THE FOLLOWING DSCC
SPECIFICATIONS
MODEL
SMR1D
SMR3D
DSCC
06020
06021
MIL SPEC
MIL-PRF-55182
MIL-PRF-55182
R
2
R
1
-
+
V
out
SMRxD
TABLE 2 - TOLERANCE AND TCR VERSUS
RESISTANCE VALUE
(- 55 °C to + 125 °C, + 25 °C Ref.)
VALUE
50
Ω
to 80 kΩ
20
Ω
to < 50
Ω
10
Ω
to < 20
Ω
5
Ω
to < 10
Ω
STANDARD
TOLERANCE
1)
± 0.01 %
± 0.02 %
± 0.05 %
± 0.1 %
TYPICAL TCR AND
MAX. SPREAD
1)
(ppm/°C)
±2±3
±2±4
±2±6
±2±8
FIGURE 1 - POWER DERATING CURVE
200
Percent of Rated Power (%)
175
150
125
100
75
50
25
0
- 75
- 25
+ 25
+ 75
+ 125
Ambient Temperature (°C)
+ 175
- 55 °C
+ 70 °C
Note
1. Tighter performances are available
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63102
Revision: 14-Nov-07
For any questions, contact: foil@vishay.com
www.vishay.com
1
SMR1D/SMR3D
Vishay Foil Resistors
High Precision Bulk Metal
®
Foil Molded Surface Mount
Resistor with TCR down to ± 2 ppm/°C, Flexible
Terminations, and Load Life Stability of ± 0.005 % (50 ppm)
TABLE 3 - PERFORMANCE SPECIFICATIONS
TEST
SMR1D
Resistance Range
10 kΩ to 33 kΩ
5
Ω
to 10 kΩ
0.250 W at 70 °C 0.160 W at 70 °C
0.125 W at 125 °C 0.08 W at 125 °C
5
Ω
to 30 kΩ
0.6 W at 70 °C
0.3 W at 125 °C
30 kΩ to 80 kΩ
0.4 W at 70 °C
0.2 W at 125 °C
CONDITIONS
SMR3D
MAXIMUM LIMIT
1)
SMR1D
5
Ω
to 33 kΩ
SMR3D
5
Ω
to 80 kΩ
Rated Power
see figure 1
Maximum Working Voltage
Maximum Operating
Temperature
Working Temperature Range
Thermal Shock
Short Time Overload
Low Temperature Storage
Low Temperature Operation
Dielectric Withstanding
Voltage
Insulation Resistance (MΩ)
Resistance to
Soldering Heat (%)
Moisture Resistance
Shock
Vibration, High Frequency
+ 175 °C (see figure 1)
- 55 °C to + 125 °C (MIL range)
- 65 °C to + 150 °C; 30 min; 5 cycles
6.25 x rated power; 5 s
24 h at - 65 °C
45 min, rated power at - 65 °C
atmospheric pressure; AC 200 V; 1 min
DC 100 V; 1 min
260 °C; 10 s
+ 65 °C to - 10 °C; 90 % to 98 % RH; rated power; 240 h
100 G; sawtooth
10 ~ 2000 ~ 10 Hz; 20 G; Y, Z each 4 h
73 V
180 V
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
over 10 000
± 0.02 %, ± 0.01 % typical
± 0.02 % (200 ppm)
± 0.01 % (100 ppm)
± 0.01 % (100 ppm)
Typical
0.005 %
0.02 %
0.02 %
Typical
0.005 %
0.015 %
0.015 %
Load Life Stability (2000 h)
0.04 W at + 70 °C
0.25 W at + 70 °C
0.125 W at + 125 °C
0.1 W at + 70 °C
0.6 W at + 70 °C
0.3 W at + 125 °C
High Temperature Exposure
Weight
Packaging
175 °C; no load 2000 h
± 0.05 % (500 ppm)
0.1143 g
0.244 g
bulk (loose) or tape and reel, per EIA-481-1
Note
1. As shown + 0.01
Ω
to allow for measurement error at low values
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2
For any questions, contact: foil@vishay.com
Document Number: 63102
Revision: 14-Nov-07
SMR1D/SMR3D
High Precision Bulk Metal
®
Foil Molded Surface Mount
Vishay Foil Resistors
Resistor with TCR down to ± 2 ppm/°C, Flexible
Terminations, and Load Life Stability of ± 0.005 % (50 ppm)
FIGURE 2 - DIMENSIONS
in inches (millimeters)
Side View
L
TH Minimum
VALUE
(5 DIGITS)
Top View
TOLERANCE
Stand Off
P
P
End View
H
100R0T
V
(DATE CODE)
-
W
LEAD (Pb)-FREE INDICATOR
Bottom View
TW
MODEL
SMR1D
SMR3D
L
0.236 ± 0.012
(5.99 ± 0.30)
0.287 ± 0.012
(7.29 ± 0.30)
W
0.126 ± 0.012
(3.20 ± 0.30)
0.170 ± 0.012
(4.32 ± 0.30)
H
0.098 ± 0.012
(2.49 ± 0.30)
0.110 ± 0.012
(2.79 ± 0.30)
P
0.051 ± 0.012
(1.30 ± 0.30)
0.051 ± 0.012
(1.30 ± 0.30)
TW
0.087 ± 0.004
(2.21 ± 0.10)
0.095 ± 0.004
(2.41 ± 0.10)
TH (minimum)
0.039
(0.99)
0.039
(0.99)
FIGURE 3 - RECOMMENDED MOUNTING PAD GEOMETRIES
in inches (millimeters)
Reflow Solder Pads
D
C
B
E
A
MODEL
SMR1D
SMR3D
Per IPC-SM-782 Rev. A
METHOD
Reflow
Reflow
A
MIN.
0.110
(2.79)
0.118
(3.00)
B
REF
0.106
(2.69)
0.106
(2.69)
C
REF
0.124
(3.15)
0.175
(4.45)
D
± 0.04 (± 1.02)
0.337
(8.55)
0.388
(9.86)
E
REF
0.050
(1.27)
0.050
(1.27)
FIGURE 4 - TRIMMING TO VALUES
(Conceptual Illustration)
FIGURE 5 - TYPICAL TCR CURVE
(For more details, see table 2)
+ 150
+ 100
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
Δ
R
R
(ppm)
+ 50
0
- 50
Mutual Inductance
Reduction due
to Change in
Current Direction
- 100
- 150
- 200
- 50
- 55
- 25
0
+ 25
+ 50
+ 75
+ 100
+ 125
± 2 ppm/°C
(+ 25 °C Reference)
NOTE:
Foil shown in
black,
etched spaces in
white
Ambient Temperature (°C)
Note:
The TCR values for < 80
Ω
are influenced by the
termination composition and the result in deviation from this curve
Document Number: 63102
Revision: 14-Nov-07
For any questions, contact: foil@vishay.com
www.vishay.com
3
SMR1D/SMR3D
Vishay Foil Resistors
High Precision Bulk Metal
®
Foil Molded Surface Mount
Resistor with TCR down to ± 2 ppm/°C, Flexible
Terminations, and Load Life Stability of ± 0.005 % (50 ppm)
TABLE 4 - GLOBAL PART NUMBER INFORMATION
NEW GLOBAL PART NUMBER: Y112110K0000T9R (preferred part number format)
DENOTES PRECISION
Y
VALUE
R
=
Ω
K
= kΩ
AER*
0
= standard
9
= lead (Pb)-free
1 - 999
= Custom
Y
1
1
2
1
1
0
K
0
0
0
0
T
9
R
PRODUCT CODE
1121
= SMR1D
1169
= SMR3D
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
R
= tape and reel
FOR EXAMPLE: ABOVE GLOBAL ORDER Y1121 10K0000 T 9 R:
TYPE: SMR1D
VALUE: 10.0 kΩ
ABSOLUTE TOLERANCE: ± 0.01 %
TERMINATION: lead (Pb)-free
PACKAGING: tape and reel
HISTORICAL PART NUMBER: SMR1D 10K000 TCR2 T S T (will continue to be used)
SMR1D
MODEL
SMR1D
SMR3D
10K000
OHMIC VALUE
10.0 kΩ
TCR2
TCR
CHARACTERISTIC
T
RESISTANCE
TOLERANCE
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
C
= ± 0.25 %
D
= ± 0.5 %
F
= ± 1.0 %
S
TERMINATION
S
= lead (Pb)-free
B
= tin/lead
T
PACKAGING
B
= bulk pack
T
= tape and reel
Note
* For non-standard requests, please contact application engineering.
www.vishay.com
4
For any questions, contact: foil@vishay.com
Document Number: 63102
Revision: 14-Nov-07
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
