VSR Series Vishay Foil Resistors Bulk Metal Foil Technology Industrial Precision Resistors with TCR of 4 ppm/C and Tolerance of 0.01 % FEATURES (1) Temperature coefficient of resistance (TCR) : 4 ppm/C (0 C to + 60 C) 8 ppm/C (- 55 C to + 125 C, + 25 C ref.) Resistance range: 0.5 to 1 M (higher or lower values of resistance are available) Vishay Foil resistors are not restricted to standard values, we can supply specific as required values at no extra cost or delivery (e.g. 1K2345 vs. 1K) Tolerance: to 0.01 % (100 ppm) INTRODUCTION Load life stability: to 0.005 % at 70 C, 2000 h at rated power Bulk Metal Foil technology out performs all other resistor technologies available today for applications that require Electrostatic discharge up to 25 000 V high precision and high stability. Non inductive, non capacitive design This technology has been pioneered and developed by Rise time: 1 ns effectively no ringing VISHAY, and products based on this technology are the Current noise: - 40 dB most suitable for a wide range of applications. Thermal EMF: 0.05 V/C typical Generally Bulk Metal Foil technology allows us to produce Voltage coefficient: < 0.1 ppm/V customer orientated products designed to satisfy challenging Inductance: 0.08 H and specific technical requirements. Matched sets available Terminal finish: lead (Pb)-free The VSR series of resistors is a low cost version of the well established S series of resistors. These resistors are made tin/lead alloy of foil elements so all of the inherent performance of foil is Prototype samples available from 72 h. For more retained. They do not however, have the same TCR or information, please contact foil vishay.com tolerance ranges (see table 1 for details). These products For better performances please review the S Series find a wide range of usage in high end stereo equipment and datasheet some grades of test and measurement equipment. Note Standoffs are dimensioned to provide a minimum lead (1) For values below 50 please contact application engineering clearance of 0.010 between the resistor body and the printed circuit board, when the standoffs are seated on the APPLICATIONS board. This allows for proper cleaning after the soldering Industrial process. Medical Our applications engineering department is available to Audio (high end stereo equipment) advise and to make recommendations for non standard Test and measurement equipment technical requirements and special applications, please contact us. Precision amplifiers FIGURE 1 - POWER DERATING CURVE FIGURE 2 - TRIMMING TO VALUES (Conceptual Illustration) - 55 C + 70 C 200% Double Rated Power 175% 150% Current Path Interloop Capacitance Before Trimming Reduction in Series 125% Rated Power 100% Current Path After Trimming Mutual Inductance 75% Trimming Process Reduction due Safe operation Removes this Material to Change in for < 150 ppm 50% from Shorting Strip Area Current Direction R after 2000 Changing Current Path hours load-life. and Increasing 25% Resistance 0 - 75 - 50 - 25 0 + 25 + 50 + 75 + 100 + 125 + 150 + 175 + 200 Ambient Temperature (C) Note: Foil shown in black, etched spaces in white * Pb containing terminations are not RoHS compliant, exemptions may apply Document Number: 63009 For any questions, contact: foil vishaypg.com www.foilresistors.com Revision: 23-Mar-10 1 Percent of Rated Power at + 125 CVSR Series Vishay Foil Resistors FIGURE 3 - IMPRINTING AND DIMENSIONS Front View Rear View L W Resistance Date Code Value Code 07 10 VISHAY 100R01 Year Week H XXXX 0.01 % Tolerance VSR4 ST LL SW Lead Material 22 AWG Model Number Round Solder Coated Copper LS TABLE 1 - MODEL SELECTION DIMENSIONS MAXIMUM TIGHTEST LOAD LIFE POWER POWER MAXIMUM TEMPERATURE TOLERANCE % MODEL RESISTANCE STABILITY at at WORKING COEFFICIENT VS. LOWEST NUMBER () (MAXIMUM INCHES mm + 70 C + 125 C VOLTAGE OF RESISTANCE RESISTANCE R) (+ 25 C REF.) VALUE () VSR 1 to 150K 0.3 W 0.2 W 300 W: 0.105 0.010 2.67 0.25 0.05 % 0 C to + 60 C L: 0.300 0.010 7.62 0.25 2000 hours 4 ppm/C 0.01/50 up to 100K H: 0.326 0.010 8.28 0.25 at + 125 C 0.02/30 (1). VSRJ 0.25 W 0.15 W ST: 0.010 minimum 0.254 minimum 0.05/5 SW: 0.040 0.005 1.02 0.13 - 55 C to + 125 C 0.1/2 over 100K LL: 1.000 0.125 25.4 3.18 8 ppm/C 0.5/1 1) LS: 0.150 0.005 3.81 0.13 VSR4 1 to 500K 0.5 W 0.4 W 350 W: 0.160 maximum 4.06 maximum L: 0.575 maximum 14.61 maximum up to 200K H: 0.413 maximum 10.49 maximum 0.25 W 0.2 W ST: 0.035 0.005 0.89 0.13 0.005/100 SW: 0.050 0.005 1.27 0.13 over 200K LL: 1.000 0.125 25.4 3.18 LS: 0.400 0.020 10.16 0.51 0.01/50 VSR5 1 to 750K 0.75 W 0.6 W 350 W: 0.160 maximum 4.06 maximum L: 0.820 maximum 20.83 maximum up to 300K 0.02/30 H: 0.413 maximum 10.49 maximum 0.4 W 0.3 W ST: 0.035 0.005 0.89 0.13 SW: 0.050 0.005 1.27 0.13 over 300K 0.05/5 LL: 1.000 0.125 25.4 3.18 LS: 0.650 0.020 16.51 0.51 0.1/2 VSR6 0.5 to 1M 1.0 W 0.8 W 500 W: 0.260 maximum 6.60 maximum L: 1.200 maximum 30.48 maximum up to 400K H: 0.413 maximum 10.49 maximum 0.5/1 0.5 W 0.4 W ST: 0.035 0.005 0.89 0.13 SW: 0.050 0.005 1.27 0.13 over 400K LL: 1.000 0.125 25.4 3.18 LS: 0.900 0.020 22.86 0.51 Note (1) 0.200 (5.08 mm) lead spacing available - specify VSRJ. FIGURE 4 - TEMPERATURE COEFFICIENT OF RESISTANCE + 400 + 200 + 4 ppm/C + 140 + 100 R R 0 (ppm) - 100 - 140 - 4 ppm/C - 200 - 400 0 + 25 + 60 Temperature, C www.foilresistors.com For any questions, contact: foil vishaypg.com Document Number: 63009 2 Revision: 23-Mar-10