SMR1DZ/SMR3DZ (Z-Foil)
Vishay Foil Resistors
Ultra High Precision Z-Foil Molded Surface Mount Resistor with
TCR down to ± 0.05 ppm/°C, PCR of ± 5 ppm at Rated Power,
Flexible Terminations, and Load Life Stability of ± 0.005 % (50 ppm)
FEATURES
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.)
Tolerance: to ± 0.01 %
Power Coefficient of Resistance (PCR)
“R due to self heating”: 5 ppm at Rated Power
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 Volts
Load Life Stability: ± 0.005 % (70 °C, 2000 hours 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
Non Hot Spot Design
Terminal Finishes available: Lead (Pb)-free
Tin/Lead Alloy
Matched sets with TCR tracking are available upon request
For higher Performances please contact us
Any Value available within Resistance Range (e.g. 1K234)
Prototype Samples available from 48 hours. For more
Information, please contact foil@vishaypg.com
Any value at any tolerance available within resistance range
INTRODUCTION
The SMRxDZ is an ultra high 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. One of the important parameters influencing
stability is the Temperature Coefficient of Resistance (TCR).
Although the TCR of foil resistors is considered extremely
low, this characteristic has been further refined over the
years. The SMRxDZ utilizes ultra high precision Bulk Metal
®
Z-Foil.
The Z-Foil technology provides a significant reduction of
the resistive element’s sensitivity to ambient temperature
variations (TCR) and to self heating when power is applied
(power coefficient).
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Voltage division with tight tracking < 2 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.
TABLE 1 - TOLERANCE AND TCR VERSUS
RESISTANCE VALUE
(- 55 °C to + 125 °C, + 25 °C Ref.)
VALUE
STANDARD
TOLERANCE
1)
± 0.01 %
TYPICAL TCR AND
MAX. SPREAD
1)
(ppm/°C)
± 0.2 ± 1.8
± 0.2 ± 2.8
± 0.2 ± 4.8
Percent of Rated Power (%)
50
to 80 k
20
to < 50
10
to < 20
5
to < 10
± 0.02 %
± 0.05 %
± 0.1 %
± 0.2 ± 6.8
Note
1. Tighter performances are available
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63118
Revision: 25-Mar-10
For any questions, contact:
foil@vishaypg.com
www.foilresistors.com
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APPLICATIONS
Precision Amplifiers
High Precision Instrumentation
Medical
Automatic Test Equipment (ATE)
Industrial
V
in
Audio (High End Stereo
Equipment)
EB Application
Military, Airborne and Space
Pulse Application
Measurement Instrumentation
R
2
R
1
-
+
V
out
SMRxDZ
FIGURE 1 - POWER DERATING CURVE
200
175
150
125
100
75
50
25
0
- 75
- 25
+ 25
+ 75
+ 125
Ambient Temperature (°C)
+ 175
- 55 °C
+ 70 °C
SMR1DZ/SMR3DZ (Z-Foil)
Vishay Foil Resistors
TABLE 2 - PERFORMANCE SPECIFICATIONS
TEST
SMR1DZ
Resistance Range
CONDITIONS
SMR3DZ
MAXIMUM LIMIT
1)
SMR1DZ
5
to 33 k
SMR3DZ
5
to 80 k
Rated Power
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
Maximum Working Voltage
Maximum Operating
Temperature
Working Temperature Range
Thermal Shock
Short Time Overload
Low Temperature Operation
Dielectric Withstanding
Voltage
Insulation Resistance (M)
Resistance to
Soldering Heat (%)
+ 175 °C (see Figure 1)
- 55 °C to + 125 °C (MIL range)
- 65 °C to + 175 °C; 30 minutes; 5 cycles
6.25 x Rated Power; 5 seconds
- 65 °C, 24 hours (no load): 45 minutes at Rated Power
Atmospheric Pressure; AC 200 V; 1 minute
DC 100 V; 1 minute
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260 °C; 10 seconds
Moisture Resistance
Shock
+ 65 °C to - 10 °C; 90 % to 98 % RH; Rated Power; 240 hours
100 G; Sawtooth
Vibration, High Frequency
10 ~ 2000 ~ 10 Hz; 20 G; X, Y, Z each 2.5 hours
Load Life Stability (2000 h)
0.04 W at + 70 °C
0.25 W at + 70 °C
0.125 W at + 125 °C
High Temperature Exposure
Weight
175 °C; no Load 2000 hours
Packaging
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
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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
See figure 1
73 V
180 V
± 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 %
0.1 W at + 70 °C
0.6 W at + 70 °C
0.3 W at + 125 °C
± 0.05 % (500 ppm)
0.1143 g
0.244 g
Document Number: 63118
Revision: 25-Mar-10
SMR1DZ/SMR3DZ (Z-Foil)
Vishay Foil Resistors
FIGURE 2 - DIMENSIONS
in inches (millimeters)
Side View
L
VALUE
(5 DIGITS)
Top View
TOLERANCE
Z-FOIL
INDICATOR
100R0T
V
(DATE CODE)
z
-
LEAD (Pb)-FREE INDICATOR
MODEL
SMR1DZ
SMR3DZ
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)
0.098 ± 0.012
(2.49 ± 0.30)
0.110 ± 0.012
(2.79 ± 0.30)
FIGURE 3 - RECOMMENDED MOUNTING PAD GEOMETRIES
in inches (millimeters)
Reflow Solder Pads
D
C
B
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MODEL
METHOD
Reflow
A
MIN.
SMR1DZ
0.110
(2.79)
SMR3DZ
Reflow
0.118
(3.00)
Per IPC-SM-782 Rev A
FIGURE 4 - TRIMMING TO VALUES
(conceptual illustration)
Interloop Capacitance
Reduction in Series
Current Path
Before Trimming
Mutual Inductance
Reduction due
to Change in
Current Direction
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
Document Number: 63118
Revision: 25-Mar-10
For any questions, contact:
foil@vishaypg.com
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Stand Off
TH Minimum
End View
P
P
H
W
Bottom View
TW
H
P
TW
TH (minimum)
0.039
(0.99)
0.051 ± 0.012
(1.30 ± 0.30)
0.087 ± 0.004
(2.21 ± 0.10)
0.051 ± 0.012
(1.30 ± 0.30)
0.095 ± 0.004
(2.41 ± 0.10)
0.039
(0.99)
E
A
B
REF
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)
0.106
(2.69)
0.106
(2.69)
FIGURE 5 - TYPICAL TCR CURVE Z-FOIL
+ 500
+ 400
+ 300
+ 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
Ambient Temperature (°C)
Notes
• For more details, see table 1
• The TCR values for < 80
are influenced by the termination
composition and the result in deviation from this curve
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SMR1DZ/SMR3DZ (Z-Foil)
Vishay Foil Resistors
TABLE 3 - GLOBAL PART NUMBER INFORMATION
NEW GLOBAL PART NUMBER: Y174510K0000T9R (preferred part number format)
DENOTES PRECISION
Y
VALUE
R
=
K
= k
AER*
0
= Standard
9
= Lead (Pb)-free
1 to 999
= Custom
Y
1
7
4
5
1
0
PRODUCT CODE
1745
= SMR1DZ
1746
= SMR3DZ
RESISTANCE TOLERANCE
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
C
= ± 0.25 %
D
= ± 0.5 %
F
= ± 1.0 %
FOR EXAMPLE: ABOVE GLOBAL ORDER Y1745 10K0000 T 9 R:
TYPE: SMR1DZ
VALUE: 10.0 k
ABSOLUTE TOLERANCE: ± 0.01 %
TERMINATION: Lead (Pb)-free
PACKAGING: Tape and Reel
HISTORICAL PART NUMBER: SMR1DZ 10K000 TCR0.2 T S T (will continue to be used)
SMR1DZ
MODEL
SMR1DZ
SMR3DZ
10K000
OHMIC VALUE
10.0 k
TCR0.2
T
TCR
CHARACTERISTIC
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Note
* For non-standard requests, please contact Application Engineering.
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For any questions, contact:
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K
0
0
0
0
T
9
R
PACKAGING
L
= Bulk Pack
R
= Tape and Reel
S
T
RESISTANCE
TOLERANCE
T
= ± 0.01 %
Q
= ± 0.02 %
A
= ± 0.05 %
B
= ± 0.1 %
C
= ± 0.25 %
D
= ± 0.5 %
F
= ± 1.0 %
TERMINATION
PACKAGING
S
= Lead (Pb)-free
B
= Tin/Lead
B
= Bulk Pack
T
= Tape and Reel
Document Number: 63118
Revision: 25-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
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Precision Group for any damages arising or resulting from such use or sale. Please contact authorized
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Product names and markings noted herein may be trademarks of their respective owners.
Document No.: 63999
Revision: 27-Apr-2011
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