Y09602R00000J9L Vishay

VCS331, VCS332 Vishay Foil Resistors Bulk Metal Foil Technology High Precision 4-Terminal Power Current Sensing Resistors with TCR as low as 1 ppm/C Maximum, Tolerance 0.1 % and Rise Time 1.0 ns Effectively No Ringing FEATURES Temperature coefficient of resistance (TCR): down to 1 ppm/C max. (see table 2) Tolerance: to 0.1 % (see table 1) Power rating (heat-sinked): 10 W Load life stability: 0.01 % (100 ppm) at 25 C, 2000 h at rated power Resistance range: 0.25 to 500 Vishay Foil resistors are not restricted to standard INTRODUCTION values specific as required values can be supplied at no extra cost or delivery (e.g. 1R2345 vs. 1R) The VCS331 and VCS332 offer precision Bulk Metal Foil Electrostatic discharge (ESD) up to 25 000 V technology resistors as low as 0.25 with a temperature Non-inductive, non-capacitive design coefficient down to 1 ppm/C maximum and unmatched long Rise time: 1.0 ns effectively no ringing term stability. The 4 terminal current sensing resistors, when Current noise: 0.010 V /V of applied voltage (< - 40 dB) mounted on a heat sink, can sustain 10 W continuously RMS Thermal EMF: 0.05 V/C typical without an appreciable change in resistance (0.15 % maximum). The typical 50 % power derating specification Voltage coefficient: < 0.1 ppm/V associated with other technologies is not necessary. A Non-inductive: 0.08 H choice of lead configurations is available. Non hot spot design Thermal stabilization time < 1 s (nominal value achieved Our application engineering department is available to within 10 ppm of steady state value) advise and make recommendations. For non-standard Terminal finish: lead (Pb)-free or tin/lead alloy technical requirements and special applications, please Prototype quantities available in just 5 working days contact us. or sooner. For more information, please contact foil vishaypg.com For better performances, please contact application engineering TABLE 1 - CHARACTERISTICS (2) POWER RATING (1) (2) MODEL NUMBER RESISTANCE RANGE BEST TOLERANCE MAXIMUM CURRENT at + 25 C (3) 10 W on heat sink VCS331, VCS332 0.25 < R < 500 0.1 % 5 A or 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 0.25 to < 1 3 ppm/C + 50 + 25 1 to < 10 2 ppm/C 0 - 50 0 + 50 + 100 + 150 + 200 Ambient Temperature C 10 to < 500 1 ppm/C (Further Derating Not Necessary) * Pb containing materials are not RoHS compliant, exemptions may apply Document Number: 63153 For any questions, contact: foil vishaypg.com www.foilresistors.com Revision: 29-Mar-10 1 IMPROVED PRODUCT Percent of Rated PowerVCS331, VCS332 Vishay Foil Resistors FIGURE 2 - TRIMMING TO VALUES (conceptual illustration) Interloop Current Path Capacitance Before Trimming Reduction in Series Current Path Mutual After Trimming Inductance Reduction due Trimming Process to Opposing Removes this Material Current in from Shorting Strip Area Adjacent Lines Changing Current Path and Increasing Resistance Note: Foil shown in black, etched spaces in white FIGURE 3- DIMENSIONS in inches (millimeters) AND SCHEMATIC Model VCS331 (E Lead Rectangular) Model VCS332 (Round Leads) W 2 L D 1 W 1 L 1 D 2 1 L 2 L 2 W 1 W 1 H 2 H 2 VISHAY H H VISHAY 1 1 VCS331 VCS332 0R3000 1% 8R2000 0.1% 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 LS LT 1 2 2 H W W LL D D P T 1 1 2 1 2 MODEL 0.008 0.008 0.008 0.020 0.020 MAX. MAX. MAX. MIN. NOM. NOM. NOM. NOM. ( 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 VCS331 (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 VCS332 - (34.04) (17.81) (26.01) (5.00) (5.33) (2.21) (25.40) (17.50) (27.51) (3.51) (1.02) (0.81) www.foilresistors.com For any questions, contact: foil vishaypg.com Document Number: 63153 2 Revision: 29-Mar-10 IMPROVED PRODUCT