SMRC1D
Vishay Foil Resistors
SURFACE MOUNT
Bulk Metal
®
Foil Technology
Surface Mount Precision Resistor
FEATURES
• Small footprint
• Temperature Coefficient of Resistance:
±
4ppm/°C (0°C to + 60°C)
• Value Range: 5Ω to 33KΩ
• Tight Tolerances available to
±
0.01 percent
• Power: 0.25 watts @ + 70°C
Product may not
be to scale
• Excellent Long Term Stability: better than
±
0.02% maximum
• Low Thermal EMF: 0.1mV/°C maximum
The SMRC1D is a truly precision molded surface mountable
resistor. It utilizes the Bulk Metal
®
Foil technology for
the resistive element with its inherent low TCR and long term
stability. This surface mountable product affords similar
performance to the time tested VSR molded through hole
product.
Voltage division with tight tracking < 5ppm/°C can be achieved
with 2 randomly selected units even with a large ratio between
the two values.
The molded SMRC1D, 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.
• Low Noise, High Frequency Operation
• Matched Sets Available
FIGURE 2 - TEMPERATURE COEFFICIENT
OF RESISTANCE CURVE (0°C TO + 60°C)
VISHAY STANDARD TCR LIMITS
0°C to + 60°C
+ 140
+ 100
+
p
4p
°
C
m/
∆R
R
(ppm)
0
- 100
- 4p
pm
/
°
C
0
FIGURE 1 - POWER DERATING CURVE
+ 25
Temperature,
°C
- 140
+ 60
Percent of Rated Power @ +125°C
200%
175%
150%
125%
–55°C
+70°C
FIGURE 3 - TEMPERATURE COEFFICIENT
OF RESISTANCE CURVE (55°C TO +125°C)
VISHAY STANDARD TCR LIMITS
- 55°C to + 125°C
+ 640
+ 500
+ 800
100%
75%
50%
25%
0
+
∆R
R
(ppm)
p
8p
°
C
m/
0
–50
–25
0
+25
+50
+75
+100 +125 +150 +175 +200
- 500
- 640
- 55
- 8p
pm
/
°
C
- 800
Ambient Temperature (°C)
+ 25
Temperature,
°C
+ 125
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 +81.42.729.0661 FAX: +81.42.729.3400
• 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
56
Document Number: 63073
Revision 26-Mar-02
SMRC1D
Bulk Metal
®
Foil Technology
Surface Mount Precision Resistor
TABLE 1 - MODEL SMRC1D SPECIFICATIONS
TEST
Resistance Range
Resistance Tolerance
100Ω to 33KΩ
20Ω to < 100Ω
10Ω to < 20Ω
5Ω to < 10Ω
0°C to + 25°C
+ 25°C to + 60°C
– 55°C to + 25°C
+ 25°C to + 125°C
0.250 watts @ 70°C
0.125 watts @ 125°C
CONDITIONS
MAXIMUM. LIMIT
5Ω to 33KΩ
±
0.01%
±
0.02%
±
0.05%
±
0.10%
Vishay Foil Resistors
SURFACE MOUNT
TCR
See Figures 2 and 3
Rated Power
See Figure 1
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
+ 125°C
– 65°C 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 200V; 1 minute
DC 100V; 1 minute
260°C; 10 seconds
+ 65°C to – 10°C; 90 to 98% RH; Rated Power; 240 hours
100G; Sawtooth
10 ~ 2,000 ~ 10Hz; 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°C to 35°C; 15°C to 75% RH; No Load; 10,000 hours
54 volts
±
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
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 +81.42.729.0661 FAX: +81.42.729.3400
• 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: 63073
Revision 26-Mar-02
www.vishay.com
57
SMRC1D
Vishay Foil Resistors
SURFACE MOUNT
Bulk Metal
®
Foil Technology
Surface Mount Precision Resistor
FIGURE 4 - MODEL SMRC1D DIMENSIONS
in inches (millimeters)
Side View
L
TH Min
Stand off
Top View
VALUE
(5 characters)
DATE CODE
P
P
End View
H
W
Bottom View
TW
MODEL
SMRC1D
MODEL
SMRC1D
L
0.236
±0.012
(6.0
±0.30)
P
0.051
±0.012
(1.3
±0.30)
W
0.126
±0.012
(3.2
±0.30)
TW
0.087
±0.004
(2.2
±0.10)
H
0.098
±0.012
(2.5
±0.30)
TH (MINIMUM)
0.039
(1.0)
FIGURE 5 - RECOMMENDED MOUNTING PAD GEOMETRIES
in inches (millimeters)
Wave Solder Pads
B
D
C
E
A
Reflow Solder Pads
B
D
C
E
A
METHOD
Wave
Reflow
A
MINIMUM
0.061
(1.55)
0.110
(2.79)
B
REFERENCE
0.106
(2.70)
0.106
(2.70)
C
REFERENCE
0.124
(3.15)
0.124
(3.15)
Per IPC-SM-782
±
0.04 (
±
1.0)
0.337
(8.55)
0.337
(8.55)
D
E
REFERENCE
0.050
(1.28)
0.050
(1.28)
TABLE 2 - ORDERING INFORMATION
MODEL
SMRC1D
RESISTANCE
RANGE
5Ω to < 1KΩ
Example: 100.01Ω = 100R01
1KΩ to 33KΩ
Example: 15,231Ω = 15K231
Delivery: Stock to 8 weeks.
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 +81.42.729.0661 FAX: +81.42.729.3400
• 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
RESISTANCE VALUE
LETTER
MULTIPLIER
DESIGNATOR
FACTOR
R
K
x 1.0
x 10
3
TOLERANCE
T =
±
0.01%
Q =
±
0.02%
A =
±
0.05%
B =
±
0.1%
C =
±
0.25%
D =
±
0.5%
F =
±
1.0%
www.vishay.com
58
Document Number: 63073
Revision 26-Mar-02
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