VCS301, VCS302 Vishay Foil Resistors High Precision 4-Terminal Power Current Sensing Resistors with TCR as low as 3 ppm/C Maximum, Tolerance to 0.5 % and Load Life Stability 0.02 % (200 ppm) at 25 C, 2000 h at Rated Power FEATURES Temperature coefficient of resistance (TCR): down to 3 ppm/C max. (see table 2) Tolerance: to 0.5 % (see table 1) Power rating (heat-sinked): 10 W Load life stability: 0.02 % (200 ppm) at 25 C, 2000 h at rated power Resistance range: 0.005 to 0.25 Vishay Foil resistors are not restricted to standard values specific as required values can be supplied at no extra cost or delivery (e.g. 0R123 vs. 0R1) Non inductive, non capacitive design INTRODUCTION Rise time: 1.0 ns effectively no ringing The VCS301 and VCS302 offer precision resistors as low as Thermal EMF: 0.05 V/C typical 5 m with a temperature coefficient down to 3 ppm/C Voltage coefficient: < 0.1 ppm/V maximum and unmatched long term stability. The 4 terminal Non inductive: 0.08 H current sensing resistors, when mounted on a heat sink, can Non hot spot design sustain 10 W continuously without an appreciable change in Terminal finish: lead (Pb)-free or tin/lead alloy resistance (0.15 % maximum). The typical 50 % power derating specification associated with other technologies is Compliant to RoHS directive 2002/95/EC not necessary. A choice of lead configurations is available. Prototype quantities available in just 5 working days or sooner. For more information, please contact Our application engineering department is available to foil vishaypg.com advise and make recommendations. For non-standard For better performances, please contact application technical requirements and special applications, please engineering contact us. TABLE 1 - CHARACTERISTICS (2) POWER RATING (1) (2) MODEL NUMBER RESISTANCE RANGE TOLERANCE MAXIMUM CURRENT at + 25 C 10 W on 0.005 < R < 0.1 1 % (3) heat sink VCS301, VCS302 15 A or 0.1 R < 0.25 0.5 % 3 W in free air Notes 1. Tighter tolerance is available - for more details contact application engineering 2. The lower of the two limitations (power or current) is decisive 3. Heatsink - aluminum (6 length x 4 width x 2 height x 0.04 thick) TABLE 2 - TCR CHART (MAXIMUM) FIGURE 1 - POWER DERATING CURVE - 55 C + 25 C (0 C TO + 60 C) + 100 + 75 0.005 to < 0.01 15 ppm/C + 50 0.01 to < 0.05 10 ppm/C + 25 0 - 50 0 + 50 + 100 + 150 + 200 0.05 to < 0.1 5 ppm/C Ambient Temperature C 0.1 to < 0.25 3 ppm/C (Further Derating Not Necessary) * Pb containing materials are not RoHS compliant, exemptions may apply Document Number: 63152 For any questions, contact: foil vishaypg.com www.foilresistors.com Revision: 29-Mar-10 1 IMPROVED PRODUCT Percent of Rated PowerVCS301, VCS302 Vishay Foil Resistors FIGURE 2 - DIMENSIONS in inches (millimeters) AND SCHEMATIC Model VCS301 (E lead rectangular) Model VCS302 (round leads) W 2 L D 1 W L 1 2 1 D 1 L 2 L 2 W 1 W 1 H 2 H 2 H VISHAY H 1 1 VISHAY VCS301 VCS302 0R1000 1% 0R1000 0.5% B9825 B9825 D LL 2 D 2 LL p T p LS LS R I I LT LT I E E I 1 1 2 2 V L L H H W W LL LS LT D D P T 1 2 1 2 1 2 1 2 MODEL 0.008 0.008 MAXIMUM 0.008 MAXIMUM MAXIMUM MINIMUM 0.020 0.020 NOMINAL NOMINAL NOMINAL NO ( 0.20) ( 0.20) ( 0.20) ( 0.51) ( 0.51) 1.340 0.701 1.063 0.197 0.210 0.087 0.216 0.689 1.083 0.138 0.040 0.040 0.016 VCS301 (34.04) (17.81) (27.00) (5.00) (5.33) (2.21) (5.49) (17.50) (27.51) (3.51) (1.02) (1.02) (0.41) 1.340 0.701 1.024 0.197 0.210 0.087 1.000 0.689 1.083 0.138 0.040 0.032 VCS302 - (34.04) (17.81) (26.01) (5.00) (5.33) (2.21) (25.40) (17.50) (27.51) (3.51) (1.02) (0.81) TABLE 3 - VISHAY VCS301, VCS302 PERFORMANCE (1) VCS301, VCS302 PERFORMANCE TEST OR CONDITION TYPICAL R LIMITS MAXIMUM R LIMITS Thermal Shock 0.01 % 0.02 % Short Time Overload (5 x Rated Power for 5 s) 0.01 % 0.02 % Terminal Strength 0.02 % 0.05 % High Temperature Exposure (2000 h at 150 C) 0.02 % 0.05 % Moisture Resistance 0.03 % 0.05 % Low Temperature Storage (24 h at - 55 C) 0.005 % 0.01 % Shock (Specified Pulse) 0.01 % 0.02 % Vibration (High Frequency) 0.01 % 0.02 % Load Life (Rated Power, + 25 C, 2000 h) 0.02 % 0.05 % Resistance Tolerance 0.5 % 1 % Thermal EMF 0.2 V/C max. (E terminal) Weight 8.1 g maximum Notes 1. Rs plus additional 0.0005 for measurement error 2. All measurements done in free air www.foilresistors.com For any questions, contact: foil vishaypg.com Document Number: 63152 2 Revision: 29-Mar-10 IMPROVED PRODUCT