SMR1D
Vishay Foil Resistors
SURFACE MOUNT
Bulk Metal
®
Foil Technology
Precision Molded Surface Mount Resistor
FEATURES
• Small footprint
• Temperature Coefficient of Resistance — Nominal TCR:
+ 0.6 ppm/°C (0°C to + 25°C);
- 0.6ppm/°C (+ 25°C to + 60°C)
+ 2.2ppm/°C (- 55°C to + 25°C)
- 1.8ppm/°C (+ 25°C to + 125°C)
• Value Range: 5Ω to 33KΩ
The SMR1D is a truly precision molded surface mountable
resistor offering all the elements of precision; including lowest
TCR, tight tolerances, 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 S102 molded through-hole product.
Voltage division with tight tracking < 3ppm can be achieved
with 2 randomly selected units even with a large ratio between
the two values.
The molded SMR1D, while slightly larger and heavier than the
Bulk Metal
®
Foil VSM surface mountable chip resistor, has a
rugged construction capable of withstanding significant thermal
cycling and allows for board installation without concern for
tolerance shifts due to manufacturing processes or mechanical
stresses.
*Reference Reason 1 in “7 Technical Reasons to Specify BMF
Resistors.”
• Tight Tolerances available to
±
0.01 percent
• Power: 0.25 watts @ + 70°C
• Excellent Long Term Stability:
±
0.02% maximum
• Low Thermal EMF: 0.1 m V/°C maximum
• Low Noise, High Frequency Operation
• Matched Sets Available
Product may not
be to scale
TABLE 1 - TOLERANCE VERSUS RESISTANCE VALUE
VALUE
(
Ω
)
100Ω to 33KΩ
20Ω to < 100Ω
10Ω to < 20Ω
5Ω to < 10Ω
STANDARD TOLERANCE
(%)
±
0.01%
±
0.02%
±
0.05%
±
0.10%
FIGURE 1 - NOMINAL TCR
FIGURE 2 - POWER DERATING CURVE
–55
Percent of Rated Power @ +125°C
–50
+500
+400
+300
+200
+100
–25
0
+25
+50
+75
+100
+125
200%
175%
150%
125%
100%
75%
50%
25%
0
–55°C
+70°C
-5
+5
pp
m
pp
m
Nominal Resistance/
Temperature (RT) Curve
∆R
R
(ppm)
0
–100
–200
–300
–400
–500
Maximum
Spread
±2.3
ppm/°C
+2.2 ppm/°C
Nominal Chord
Slope (TCR)
–1.8 ppm/°C
Nominal Chord
Slope (TCR)
Standard
Spread
±2.0
ppm/°C
–55°C / +25°C / +125°C are the test points
with +25°C as the reference temperature
–50
–25
0
+25
+50
+75
+100 +125 +150 +175 +200
Ambient Temperature (°C)
VISHAY FOIL • FRANCE +33.4.93.37.28.24 FAX: +33.4.93.37.27.31
• GERMANY +49.9287.710 FAX: +49 9287.70435
• ISRAEL +972.3.557.0945 FAX: +972.3.558.9121
• ITALY + 39.2.300.11919 FAX: +39.2.300.11999
• JAPAN +81.3.5464.6411 FAX: +81.3.5464.6433
• SINGAPORE +65.788.6668 FAX: +65.788.0988
• SWEDEN +46.8.594.70590 FAX: +46.8.594.70581
• UK +44 191 514 8237 FAX: +44 1953 457 722
• USA +1 610 407-4800 FAX: +1 610 640-9081
www.vishay.com
18
Document Number: 63022
Revision 23-Dec-03
SMR1D
Bulk Metal
®
Foil Technology
Surface Mount Precision Resistor
TABLE 2 - MODEL SMR1D SPECIFICATIONS
TEST
Resistance Range
TCR
0°C to + 25°C
+ 25°C to + 60°C
– 55 to + 25°C
+ 25°C to + 125°C
Rated Power
0.250 watts @ 70°C
0.125 watts @ 125°C
Maximum Working Voltage
Maximum Operating Temperature
Working Temperature Range
Thermal Shock
Overload
Low Temperature Operation
Dielectric Withstanding Voltage
Insulation Resistance (M
Ω
)
Resistance to Soldering Heat (%)
Moisture Resistance
Shock
Vibration, High Frequency
Load Life Stability
Order of Magnitude better
than Thin Film Technology
High Temperature Exposure
Shelf Life
Weight
Packaging
Bulk (Loose) or Tape & Reel, per EIA-481-1
+ 125°C
– 65 to + 125°C
– 65°C to + 175°C; 30 minutes.; 5 cycles
2.5 x Rated Voltage; 5 Seconds
– 65°C; 45 minutes @ Rated Power
Atmospheric Pressure; AC 200 V; 1 minute
DC 100 V; 1 minute
260°C; 10 seconds
+ 65°C to – 10°C; 90 to 98% RH; Rated Power; 240 hours
100 G; Sawtooth
10~ 2,000~ 10 Hz; 20 G; X, Y, Z each 2.5 hours
0.125 watts @ 125°C 2,000 hours.
0.25 watts @ 70°C 2,000 hours.
0.04 watts @ 70°C 2,000 hours.
+ 175°C; No Load 2,000 hours
15 to 35°C; 15 to 75% RH; No Load; 10,000 hours
±
0.01%
±
0.01%
±
0.01%
±
0.01%
over 10,000
±
0.03%,
±
0.01% Typical
±
0.05%
±
0.01%
±
0.01%
±
0.02%
±
0.02%
±
0.005%
±
0.05%
±
0.0025% (1 year)
±
0.005% (3 years)
0.1143 grams
54 volts
See Figure 2, previous page
See Figures 1
CONDITIONS
MAXIMUM LIMIT
5Ω to 33KΩ
Vishay Foil Resistors
SURFACE MOUNT
VISHAY FOIL • FRANCE +33.4.93.37.28.24 FAX: +33.4.93.37.27.31
• GERMANY +49.9287.710 FAX: +49 9287.70435
• ISRAEL +972.3.557.0945 FAX: +972.3.558.9121
• ITALY + 39.2.300.11919 FAX: +39.2.300.11999
• JAPAN +81.3.5464.6411 FAX: +81.3.5464.6433
• SINGAPORE +65.788.6668 FAX: +65.788.0988
• SWEDEN +46.8.594.70590 FAX: +46.8.594.70581
• UK +44 191 514 8237 FAX: +44 1953 457 722
• USA +1 610 407-4800 FAX: +1 610 640-9081
Document Number: 63022
Revision 23-Dec-03
www.vishay.com
19
SMR1D
Vishay Foil Resistors
SURFACE MOUNT
Bulk Metal
®
Foil Technology
Surface Mount Precision Resistor
FIGURE 3 - MODEL SMR1D DIMENSIONS
in inches (millimeters)
Side View
L
TH Minimum
Stand Off
Top View
80K00T
100R0T
(DATE CODE)
End View
P
P
H
W
Bottom View
TW
V
MODEL
SMR1D
L
0.236
±
0.012
(6.0
±
0.30)
W
0.126
±
0.012
(3.2
±
0.30)
H
0.098
±
0.012
(2.5
±
0.30)
P
0.051
±
0.012
(1.3
±
0.30)
TW
0.087
±
0.004
(2.2
±
0.10)
TH (MINIMUM)
0.039
(1.0)
FIGURE 4 - RECOMMENDED MOUNTING PAD GEOMETRIES
in inches (millimeters)
B
Wave Solder Pads
D
C
Reflow Solder Pads
D
C
B
E
A
E
A
METHOD
Wave
A
MINIMUM
0.061
(1.55)
B
REF
0.106
(2.70)
C
REF
0.124
(3.15)
D
±
0.04 (
±
1.0)
0.337
(8.55)
E
REF
0.050
(1.28)
METHOD
Reflow
A
MINIMUM
0.110
(2.79)
B
REF
0.106
(2.70)
C
REF
0.124
(3.15)
D
±
0.04 (
±
1.0)
0.337
(8.55)
E
REF
0.050
(1.28)
Per IPC-SM-782 Rev A
TABLE 3 - ORDERING INFORMATION
RESISTANCE VALUE
MODEL
RESISTANCE
RANGE
5Ω to < 1KΩ
Example: 249R00 - 249Ω
33KΩ
Example: 33K000 = 33.0KΩ
LETTER
DESIGNATOR
R
MULTIPLIER
FACTOR
x 1.0
TOLERANCE
T =
±
0.01%
Q =
±
0.02%
A =
±
0.05%
B =
±
0.1%
C =
±
0.25%
D =
±
0.5%
F =
±
1.0%
PACKAGING
T = Tape and Reel
B = Bulk Pack
SMR1D
K
x 10
3
VISHAY FOIL • FRANCE +33.4.93.37.28.24 FAX: +33.4.93.37.27.31
• GERMANY +49.9287.710 FAX: +49 9287.70435
• ISRAEL +972.3.557.0945 FAX: +972.3.558.9121
• ITALY + 39.2.300.11919 FAX: +39.2.300.11999
• JAPAN +81.3.5464.6411 FAX: +81.3.5464.6433
• SINGAPORE +65.788.6668 FAX: +65.788.0988
• SWEDEN +46.8.594.70590 FAX: +46.8.594.70581
• UK +44 191 514 8237 FAX: +44 1953 457 722
• USA +1 610 407-4800 FAX: +1 610 640-9081
www.vishay.com
20
Document Number: 63022
Revision 23-Dec-03
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