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| SMR3D Vishay Foil Resistors SURFACE MOUNT Bulk Metal(R) Foil Technology Precision Molded Surface Mount Resistor FEATURES * Performance Similar to Time Tested S102 Through Hole Resistor * Temperature Coefficient of Resistance -- Nominal TCR: + 0.6ppm/C (0C to + 25C); - 0.6ppm/C (+ 25C to + 60C) + 2.2ppm/C (- 55C to + 25C) - 1.8ppm/C (+ 25C to + 125C) * Value Range: 5 to 80K * Tight Tolerances: available to 0.01 percent * Power: 0.6 watts @ + 70C * Excellent Long Term Stability: 0.015% * Low Thermal EMF: 0.1V/C maximum * Low Noise, High Frequency Operation * Matched Sets Available Product may not be to scale The SMR3D 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(R) 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 2 values. The molded SMR3D, 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. *Reference Reason 1 in "7 Technical Reasons to specify BULK METAL(R) FOIL Resistors." TABLE 1 - TOLERANCE VERSUS RESISTANCE VALUE VALUE () 100 to 80k 20 to < 100 10 to 20 5 to 10 STANDARD TOLERANCE (%) 0.01 0.02 0.05 0.10 FIGURE 1 - NOMINAL TCR FIGURE 2 - POWER DERATING CURVE -50 +500 +400 +300 +200 -25 0 +25 +50 +75 +100 +125 Percent of Rated Power @ +125C -55 200% 175% 150% 125% 100% 75% 50% 25% 0 -55C +70C -5 +5 pp m pp m Nominal Resistance/ Temperature (RT) Curve R R (ppm) +100 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 -55C / +25C / +125C are the test points with +25C 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 +81.42.729.0661 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 20 Document Number: 63021 Revision 03-Jul-02 SMR3D Bulk Metal Foil Technology Vishay Foil Resistors Precision Molded Surface Mount Resistor (R) SURFACE MOUNT TABLE 2 - MODEL SMR3D SPECIFICATIONS TEST Resistance Range TCR 0C to + 25C + 25C to + 60C - 55 to + 25C + 25C to + 125C 5 to 30K Rated Power 0.6 watts @ 70C 0.3 watts @ 125C 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, per EIA-481-1 + 125C - 65 to + 125C - 65C to + 175C; 30 minutes; 5 cycles 2.5 x Rated Voltage; 5 Seconds - 65C; 45 minutes @ Rated Power Atmospheric Pressure; AC 200 V; 1 minute DC 100 V; 1 minute + 260C; 10 seconds + 65C to - 10C; 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 0.3 watts @ + 125C 0.6 watts @ + 70C 0.1 watts @ + 70C 2,000 hours 2,000 hours 2,000 hours 0.01% 0.01% 0.01% 0.01% over 10,000 0.03%, 0.01% Typical 0.05% 0.01% 0.01% 0.015% 0.015% 0.005% 0.05% 0.0025% (1 year) 0.005% (3 years) 0.244 Grams above 30K 0.4 watts 0.2 watts 300 Volts See Figure 2, Previous page See Figure 1 CONDITIONS MAXIMUM LIMIT 5 to 80K + 175C; No Load 2,000 hours 15 to 35C; 15 to 75% RH; No Load; 10,000 hours 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: 63021 Revision 03-Jul-02 www.vishay.com 21 SMR3D Vishay Foil Resistors SURFACE MOUNT Bulk Metal(R) Foil Technology Precision Molded Surface Mount Resistor FIGURE 3 - MODEL SMR3D DIMENSIONS in inches (millimeters) Side View L TH Minimum Stand Off Top View 80K00T80 (DATE CODE) End View P P H V W Bottom View TW MODEL SMR3D L 0.287 0.012 (7.3 0.30) W 0.170 0.012 (4.3 0.30) H 0.110 0.012 (2.8 0.30) P 0.051 0.012 (1.3 0.30) TW 0.095 0.004 (2.4 0.10) TH (MINIMUM) 0.039 (1.0) FIGURE 4 - RECOMMENDED MOUNTING PAD GEOMETRIES in inches (millimeters) B Wave Solder Pads D C E A Reflow Solder Pads D C B E A METHOD Wave A B C REF 0.175 (4.45) D E METHOD A MINIMUM 0.118 (3.00) B REF 0.106 (2.70) C REF 0.175 (4.45) D E REF 0.050 (1.28) MINIMUM REF 0.066 0.106 (1.68) (2.70) 0.04 ( 1.0) 0.388 (9.85) REF 0.050 Reflow (1.28) Per IPC-SM-782 Rev A 0.04 ( 1.0) 0.388 (9.85) TABLE 3 - ORDERING INFORMATION MODEL SMR3D RESISTANCE RANGE 5 to < 1K Example: 249R00 - 249 1K to 80K Example: 80K000 = 80K RESISTANCE VALUE LETTER MULTIPLIER DESIGNATOR FACTOR R 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% K x 103 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 22 Document Number: 63021 Revision 03-Jul-02 |
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