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SMRC1D
Vishay Foil Resistors
SURFACE MOUNT
Bulk Metal(R) Foil Technology Surface Mount Precision Resistor
FEATURES
* Small footprint * Temperature Coefficient of Resistance: 4ppm/C (0C to + 60C) * Value Range: 5 to 33K * Tight Tolerances available to 0.01 percent * Power: 0.25 watts @ + 70C
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 (R) 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(R) 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 (0C TO + 60C)
VISHAY STANDARD TCR LIMITS 0C to + 60C + 140 + 100
+4 pp 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 @ +125C
200% 175% 150% 125%
-55C
+70C
FIGURE 3 - TEMPERATURE COEFFICIENT OF RESISTANCE CURVE (55C TO +125C)
VISHAY STANDARD TCR LIMITS - 55C to + 125C + 640 + 500 + 800
100% 75% 50% 25% 0
+8
pp
C m/
R R (ppm)
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(R) Foil Technology Surface Mount Precision Resistor
TABLE 1 - MODEL SMRC1D SPECIFICATIONS
TEST Resistance Range Resistance Tolerance 100 to 33K 20 to < 100 10 to < 20 5 to < 10 0C to + 25C + 25C to + 60C - 55C to + 25C + 25C to + 125C 0.250 watts @ 70C 0.125 watts @ 125C CONDITIONS MAXIMUM. LIMIT 5 to 33K 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) 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 + 125C - 65C to + 125C - 65C to + 175C; 30 minutes; 5 cycles 2.5 x Rated Voltage; 5 seconds - 65C; 45 minutes @ Rated Power Atmospheric Pressure; AC 200V; 1 minute DC 100V; 1 minute 260C; 10 seconds + 65C to - 10C; 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 @ 125C 2,000 hours. 0.25 watts @ 70C 2,000 hours. 0.04 watts @ 70C 2,000 hours. + 175C; No Load 2,000 hours 15C to 35C; 15C 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(R) 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 5 to < 1K Example: 100.01 = 100R01 1K to 33K Example: 15,231 = 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 103
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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