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,
+ 25 °C ref.)
Tolerance: to ± 0.01 %
Flexible terminations ensure minimal stress
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
to 80 k (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@vishaypg.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
to 80 k
20
to < 50
10
to < 20
5
to < 10
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: 23-Mar-10
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
1
SMR1D/SMR3D
Vishay Foil Resistors
TABLE 3 - PERFORMANCE SPECIFICATIONS
TEST
SMR1D
Resistance Range
10 k to 33 k
5
to 10 k
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
to 30 k
0.6 W at 70 °C
0.3 W at 125 °C
30 k to 80 k
0.4 W at 70 °C
0.2 W at 125 °C
CONDITIONS
SMR3D
MAXIMUM LIMIT
1)
SMR1D
5
to 33 k
SMR3D
5
to 80 k
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 (M)
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
to allow for measurement error at low values
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For any questions, contact:
foil@vishaypg.com
Document Number: 63102
Revision: 23-Mar-10
SMR1D/SMR3D
Vishay Foil Resistors
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
are influenced by the
termination composition and the result in deviation from this curve
Document Number: 63102
Revision: 23-Mar-10
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
3
SMR1D/SMR3D
Vishay Foil Resistors
TABLE 4 - GLOBAL PART NUMBER INFORMATION
NEW GLOBAL PART NUMBER: Y112110K0000T9R (preferred part number format)
DENOTES PRECISION
Y
VALUE
R
=
K
= k
AER*
0
= standard
9
= lead (Pb)-free
1 to 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 k
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 k
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.foilresistors.com
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For any questions, contact:
foil@vishaypg.com
Document Number: 63102
Revision: 23-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
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