www.vishayfoilresistors.com
1
SMR1DZ / SMR3DZ (Z-Foil)
For any questions, contact
foil@vpgsensors.com
4151-EN
Rev 13-Aug-2020
Ultra High Precision Z-Foil Molded Surface Mount Resistor
Ultra High Precision Z-Foil Molded Surface Mount Resistor
with TCR down to ±0.2 ppm/°C, PCR of ±5 ppm at Rated Power,
Flexible Terminations, and Load-Life Stability of ±0.005 % (50 ppm)
FEATURES AND BENEFITS
• Temperature coefficient of resistance (TCR):
±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): at least to 25 kV
• Load-life stability: ±0.005% (70°C, 2000 h)
• 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
• Non hot spot design
• Terminal finishes available: lead (Pb)-free, tin/lead alloy
• Matched sets with TCR tacking are available upon
request
• For higher performances, please contact us
• Any value available within Resistance Range (e.g.,
1K234)
• For prototype samples, please contact
foil@vpgsensors.com
APPLICATIONS
• Precision amplifiers
• High precision
instrumentation
• Medical
• Automatic test
equipment (ATE)
• Industrial
• Audio (high end stereo
equipment)
• EB application
• Military, airborne and
space
• Pulse application
• Measurement
instrumentation
SMR1DZ / SMR3DZ (Z-Foil)
4151-EN
Rev 13-Aug-2020
Figure 1—Power Derating Curve
200
175
150
125
100
75
50
25
0
Percent of Rated Power (%)
–75–25 +25+75 +125 +175
Table 1—Tolerance and TCR vs. Resistance
Value
(–55°C to +125°C, +25°C Ref.)
Value
(Ω)
Standard
Tolerance
(1)
(%)
Typical TCR and
Max. Spread
(1)
(ppm/°C)
50 Ω to 80 kΩ ±0.01%
±0.2 ±1.8
20 Ω to <50 Ω ±0.02%
±0.2 ±2.8
10 Ω to <20 Ω ±0.05%
±0.2 ±4.8
5 Ω to <10
Ω ±0.1%
±0.2 ±6.8
Note
(1)
For values <5 Ω and tighter performance, contact us.
Note
* This datasheet provides information about parts that are
RoHS-compliant and/or parts that are non-RoHS-compliant.
For example, parts with lead (Pb) terminations are not RoHS
compliant. Please see the information/tables in this datasheet
for details.
R
1
2
in
V
-
+
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
Any value at any tolerance
available within resistance range
