SMR1D/SMR3D
Vishay Foil Resistors
Ultra High Precision Foil Molded Surface Mount Resistor,
TCR of
±
2 ppm/
°
C and Load Life Stability of
±
0.005%
FEATURES
• TCR:
±
2 ppm/ typical, (see Table 1)
• Load Life Stability (70°C for 2000 hours):
Pb-free
±
0.005%
Available
• Power Rating to 600mW at + 70°C
• Resistance Range: 5Ω to 80KΩ (for higher and lower
values, please contact us)
• Tolerance: to
±
0.01%
• Shelf Life Stability: 0.0025% (25 ppm)
• Low Current Noise: - 40dB “Noise free component”
• Low Voltage Coefficient < 0.1 ppm/V
• Non Inductive: < 0.08
µH
• Thermal EMF: 0.05µV/°C
• Terminal Finishes Available:
Lead (Pb)-Free
Tin/Lead Alloy
• Matched sets with TCR tracking < 2 ppm/°C are
available per request
• For higher performances please review
VSMP
Series
and
VFCP
Series datasheets
APPLICATIONS
R
2
INTRODUCTION
Bulk Metal
®
Foil (BMF) Technology out-performs all other
resistor technologies available today for applications that
require High Precision and High Stability.
This technology has been invented, patented and pioneered
by Vishay. Products based on this technology are the most
suitable for a wide range of appilcations.
BMF technology allows to produce customer oriented prod-
ucts designed to satisfy challenging and specific technical
requirements.
The BMF provides inherently a low and predictable Tem-
perature Coefficient of Resistance (TCR) and excellent load
life stability for high precision analog applications.
The SMRxD is a precision molded surface mountable resistor
offering all the elements of precision; including lowest 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 and legendary low predictable TCR and long term
stability. This surface mountable product affords similar
performance to the time tested S Series molded through-hole
product.
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.
P
R
O
D
U
C
T
• Precision Amplifliers
• High Precision Instrumentation
• Medical and Test equipment
• Industrial
R
1
Vin
-
+
Vout
• Automatic test equipment (ATE)
SMRXD
• Audio (High end stereo equipment)
• EB application
• Military, Airborne and Space
• Pulse application
• Measurement instrumentation
N
E
W
200%
175%
150%
125%
100%
Our Application Engineering Department is available to
advise and make recommendations for non standard
technical requirements and special applications. Please
contact us.
FIGURE 1 - POWER DERATING CURVE
–55°C
+70°C
TABLE 1 - TOLERANCE AND TCR VERSUS
RESISTANCE VALUE*
VALUE
(Ω)
50Ω to 80KΩ
20Ω to < 50Ω
10Ω to < 20Ω
5Ω to < 10Ω
STANDARD
TOLERANCE (%)
±
0.01%
±
0.02%
±
0.05%
±
0.10%
TYPICAL TCR AND
MAX. SPREAD
(PPM/
°
C)
±
2
±
3
±
2
±
4
±
2
±
6
±
2
±
8
Percent of Rated Power
75%
50%
25%
0
–50
–25
0
+25
+50
+75
+100 +125 +150 +175 +200
Ambient Temperature (°C)
* For tighter performances, please contact Vishay Application
Engineering using the e-mail addresses in the footer below.
SALES
• AMERICAS: foilsales.usa@vishay.com
• ASIA/JAPAN: foilsales.asia@vishay.com
• UK/HOLLAND/SCANDINAVIA: foilsales.eunorth@vishay.com
• GERMANY/CZECH REPUBLIC/AUSTRIA: foilsales.eucentral@vishay.com • FRANCE/SWITZERLAND/SOUTHERN EUROPE: foilsales.eusouth@vishay.com
• ISRAEL: foilsales.israel@vishay.com
www.vishay.com
18
For technical questions, contact: foil@vishay.com
Document Number: 63102
Revision 22-Mar-06
SMR1D/SMR3D
Ultra High Precision
Vishay Foil Resistors
Foil Molded Surface Mount Resistor,
TCR of
±
2 ppm/°C and Load Life Stability of
±
0.005%
TABLE 2 - MODELS SMR1D AND SMR3D SPECIFICATIONS
TEST
SMR1D
Resistance Range
Rated Power
5Ω to 10KΩ
Above 10KΩ
0.250 W @ 70°C 0.160 W @ 70°C
0.125 W @ 125°C 0.08 W @ 125°C
5Ω to 30K
0.6 W @ 70°C
0.3 W @ 125°C
Above 30K
0.4 W @ 70°C
0.2 W @ 125°C
CONDITIONS
SMR3D
MAXIMUM LIMIT*
SMR1D
5Ω to 33KΩ
SMR3D
5Ω to 80KΩ
Maximum Working Voltage
Maximum Operating Temperature
Working Temperature Range
Thermal Shock
Short Time Overload
Low Temperature Operation
Dielectric Withstanding Voltage
Insulation Resistance (M
Ω
)
Resistance to Soldering Heat (%)
Moisture Resistance
Shock
Vibration, High Frequency
Load Life Stability (2000 hours)
P
R
O
D
U
C
T
73 V
+ 175°C (See Figure 1)
– 55°C to + 125°C (MIL range)
– 65°C to + 175°C; 30 minutes.; 5 cycles
2.5 x Rated Voltage; 5 Seconds
±
0.01%
±
0.01%
±
0.01%
±
0.01%
Atmospheric Pressure; AC 200 V; 1 minute
DC 100 V; 1 minute
260°C; 10 seconds
100 G; Sawtooth
±
0.02%
±
0.01%
10~ 2,000~ 10 Hz; 20 G; X, Y, Z each 2.5 hours
0.04 watts @ + 70°C
0.25 watts @ + 70°C
0.125 watts @ + 125°C
0.1 watts @ + 70°C
0.6 watts @ + 70°C
0.3 watts @ + 125°C
+ 175°C; No Load 2,000 hours
±
0.05%
15°C to 35°C; 15% to 75% RH; No Load
0.1143 grams
Bulk (Loose) or Tape & Reel, per EIA-481-1
Side View
L
TH Minimum
Stand Off
P
P
H
W
Bottom View
TW
End View
Top View
100R0T
80K00T
See Figure 1, previous page
180 V
- 65°C, 24 hours (no load): 45 minutes @ Rated Power
over 10,000
±
0.02%,
±
0.01% typical
+ 65°C to - 10°C; 90% to 98% RH; Rated Power; 240 hours
±
0.01%
Typical
±
0.005%
±
0.005%
±
0.02%
±
0.015%
±
0.02%
±
0.015%
High Temperature Exposure
Shelf Life Stability
Weight
Packaging
±
0.0025%
0.244 grams
*As shown +0.01Ω to allow for measurement error at low values
N
E
W
V
FIGURE 2 - DIMENSIONS
in inches (millimeters)
(DATE CODE)
MODEL
SMR1D
SMR3D
L
0.236
±
0.012
(6.0
±
0.30)
0.287
±
0.012
(7.3
±
0.30)
W
0.126
±
0.012
(3.2
±
0.30)
0.170
±
0.012
(4.3
±
0.30)
H
0.098
±
0.012
(2.5
±
0.30)
0.110
±
0.012
(2.8
±
0.30)
P
0.051
±
0.012
(1.3
±
0.30)
0.051
±
0.012
(1.3
±
0.30)
TW
0.087
±
0.004
(2.2
±
0.10)
0.095
±
0.004
(2.4
±
0.10)
TH (MINIMUM)
0.039
(1.0)
0.039
(1.0)
SALES
• AMERICAS: foilsales.usa@vishay.com
• ASIA/JAPAN: foilsales.asia@vishay.com
• UK/HOLLAND/SCANDINAVIA: foilsales.eunorth@vishay.com
• GERMANY/CZECH REPUBLIC/AUSTRIA: foilsales.eucentral@vishay.com • FRANCE/SWITZERLAND/SOUTHERN EUROPE: foilsales.eusouth@vishay.com
• ISRAEL: foilsales.israel@vishay.com
Document Number: 63102
Revision 22-Mar-06
For technical questions, contact: foil@vishay.com
www.vishay.com
19
SMR1D/SMR3D
Vishay Foil Resistors
Ultra High Precision
Foil Molded Surface Mount Resistor,
TCR of
±
2 ppm/°C and Load Life Stability of
±
0.005%
FIGURE 3 - RECOMMENDED MOUNTING PAD GEOMETRIES
in inches (millimeters)
Reflow Solder Pads
D
C
B
E
A
MODEL
SMR1D
SMR3D
METHOD
Reflow
Reflow
A
MINIMUM
0.110
(2.79)
0.118
(3.00)
P
R
O
D
U
C
T
B
REF
C
REF
D
±
0.04 (
±
1.0)
0.337
(8.55)
E
REF
0.050
(1.28)
0.050
(1.28)
0.106
(2.70)
0.124
(3.15)
0.106
(2.70)
0.175
(4.45)
0.388
(9.85)
Per IPC-SM-782 Rev A
FIGURE 4 - TYPICAL TCR CURVE
(For more details, see table 1)
+150
+100
∆
R
+50
0
R
(ppm)
-50
-100
-150
-200
± 2ppm/
°
C (+25°C reference)
-50
-55
-25
0
+25
+50
+75
+100
+125
Ambient Temperature (°C)
Note: The TCR values for < 100Ω are influenced by the termination composition and result in deviation from this curve
N
E
W
MODEL
RANGE
SMR1D
RESISTANCE
TABLE 3 - ORDERING INFORMATION
RESISTANCE VALUE
LETTER
DESIGNATOR
R
MULTIPLIER
FACTOR
x 1.0
ABSOLUTE ABSOLUTE
TOLERANCE
TCR
TCR2
T =
±
0.01%
Q =
±
0.02%
A =
±
0.05%
B =
±
0.1%
C =
±
0.25%
D =
±
0.5%
F =
±
1.0%
TERMINATION
PACKAGING
5Ω to < 1KΩ
Example: 249R00 - 249Ω
S = Lead (Pb)-Free T = Tape and Reel
B = Tin/Lead
B = Bulk Pack
SMR3D
1KΩ to 80KΩ
Example: 33K000 = 33.0KΩ
K
x 10
3
Example:
SMR3D 10K000 TCR2TSB
Model: SMR3D
Value: 10KΩ
TCR2: 2 ppm/
°
C typical refers to any value in the resistance range.
Tolerance:
±
0.01%
Termination: Lead (Pb)-Free
Packaging: Bulk Pack
SALES
• AMERICAS: foilsales.usa@vishay.com
• ASIA/JAPAN: foilsales.asia@vishay.com
• UK/HOLLAND/SCANDINAVIA: foilsales.eunorth@vishay.com
• GERMANY/CZECH REPUBLIC/AUSTRIA: foilsales.eucentral@vishay.com • FRANCE/SWITZERLAND/SOUTHERN EUROPE: foilsales.eusouth@vishay.com
• ISRAEL: foilsales.israel@vishay.com
www.vishay.com
20
For technical questions, contact: foil@vishay.com
Document Number: 63102
Revision 22-Mar-06
Legal Disclaimer Notice
Vishay
Notice
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,
or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Vishay for any damages resulting from such improper use or sale.
Document Number: 91000
Revision: 08-Apr-05
www.vishay.com
1
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