VCS331, VCS332 Vishay Foil Resistors Bulk Metal(R) 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 PR O DU CT Temperature coefficient of resistance (TCR): INTRODUCTION The VCS331 and VCS332 offer precision Bulk Metal(R) Foil technology resistors as low as 0.25 with a temperature coefficient down to 1 ppm/C maximum and unmatched long term stability. The 4 terminal current sensing resistors, when mounted on a heat sink, can sustain 10 W continuously without an appreciable change in resistance (0.15 % maximum). The typical 50 % power derating specification associated with other technologies is not necessary. A choice of lead configurations is available. IM PR O VE D Our application engineering department is available to advise and make recommendations. For non-standard technical requirements and special applications, please contact us. 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 values; specific "as required" values can be supplied at no extra cost or delivery (e.g. 1R2345 vs. 1R) Electrostatic discharge (ESD) up to 25 000 V Non-inductive, non-capacitive design Rise time: 1.0 ns effectively no ringing Current noise: 0.010 VRMS/V of applied voltage (< - 40 dB) Thermal EMF: 0.05 V/C typical Voltage coefficient: < 0.1 ppm/V Non-inductive: 0.08 H Non hot spot design Thermal stabilization time < 1 s (nominal value achieved within 10 ppm of steady state value) Terminal finish: lead (Pb)-free or tin/lead alloy Prototype quantities available in just 5 working days or sooner. For more information, please contact foil@vishaypg.com For better performances, please contact application engineering TABLE 1 - CHARACTERISTICS MODEL NUMBER RESISTANCE RANGE BEST TOLERANCE (1) POWER RATING (2) at + 25 C MAXIMUM CURRENT (2) VCS331, VCS332 0.25 < R < 500 0.1 % 10 W on heat sink (3) or 3 W in free air 5A 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 (0 C TO + 60 C) to <1 3 ppm/C 1 to < 10 2 ppm/C Percent of Rated Power 0.25 + 25 C + 100 + 75 + 50 + 25 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 Revision: 29-Mar-10 For any questions, contact: foil@vishaypg.com www.foilresistors.com 1 VCS331, VCS332 Vishay Foil Resistors FIGURE 2 - TRIMMING TO VALUES (conceptual illustration) PR O DU CT Interloop Capacitance Reduction in Series Current Path Before Trimming Current Path After Trimming Mutual Inductance Reduction due to Opposing Current in Adjacent Lines Trimming Process Removes this Material from Shorting Strip Area 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) W2 L1 L2 D1 Model VCS332 (Round Leads) L1 L2 W1 W1 IM PR O VE D H2 H2 VISHAY VCS331 0R3000 1% B9825 H1 D2 H1 LL VISHAY VCS332 8R2000 0.1% B9825 D2 LS R I LT I1 E1 LL p T p W2 D1 LS I LT E2 I2 V MODEL L1 0.008 ( 0.20) L2 0.008 ( 0.20) H1 MAX. H2 0.008 ( 0.20) W1 MAX. W2 MAX. LL MIN. LS 0.020 ( 0.51) LT 0.020 ( 0.51) D1 NOM. D2 NOM. P NOM. T NOM. VCS331 1.340 (34.04) 0.701 (17.81) 1.063 (27.00) 0.197 (5.00) 0.210 (5.33) 0.087 (2.21) 0.216 (5.49) 0.689 (17.50) 1.083 (27.51) 0.138 (3.51) 0.040 (1.02) 0.040 (1.02) 0.016 (0.41) VCS332 1.340 (34.04) 0.701 (17.81) 1.024 (26.01) 0.197 (5.00) 0.210 (5.33) 0.087 (2.21) 1.000 (25.40) 0.689 (17.50) 1.083 (27.51) 0.138 (3.51) 0.040 (1.02) 0.032 (0.81) - www.foilresistors.com 2 For any questions, contact: foil@vishaypg.com Document Number: 63153 Revision: 29-Mar-10 VCS331, VCS332 Vishay Foil Resistors TABLE 3 - VISHAY VCS331, VCS332 PERFORMANCE VCS331, VCS332 PERFORMANCE (1) TEST OR CONDITION TYPICAL R LIMITS MAXIMUM R LIMITS 0.01 % 0.02 % PR O DU CT Thermal Shock Short Time Overload (5 x rated power for 5 s) Terminal Strength High Temperature Exposure (2000 h at + 150 C) Moisture Resistance Low Temperature Storage (24 h at - 55 C) Shock (specified pulse) Vibration (high frequency) Load Life (rated power, + 25 C, 2000 h) Resistance Tolerance Thermal EMF 0.01 % 0.02 % 0.02 % 0.05 % 0.02 % 0.05 % 0.03 % 0.05 % 0.005 % 0.01 % 0.01 % 0.02 % 0.01 % 0.02 % 0.01 % 0.02 % 0.1 % 1% 0.2 V/C max. (E terminal) Weight 8.1 g maximum Notes (1) R's plus additional 0.0005 for measurement error TABLE 4 - GLOBAL PART NUMBER INFORMATION (1) NEW GLOBAL PART NUMBER: Y09600R25000B9L (preferred part number format) DENOTES PRECISION VALUE CHARACTERISTICS R= 0 = standard 9 = lead (Pb)-free 1 to 999 = custom IM PR O VE D Y Y 0 9 6 0 0 R 2 5 0 0 0 B 9 PRODUCT CODE RESISTANCE TOLERANCE PACKAGING 0960 = VCS331 0944 = VCS332 B = 0.1 % D = 0.5 % F = 1.0 % G = 2.0 % J = 5.0 % L = bulk pack L FOR EXAMPLE: ABOVE GLOBAL ORDER Y0960 0R25000 B 9 L: TYPE: VCS331 VALUE: 0.25 ABSOLUTE TOLERANCE: 0.1 % TERMINATION: lead (Pb)-free PACKAGING: bulk HISTORICAL PART NUMBER: VCS331T 0R2500 B B (will continue to be used) VCS331 T 0R2500 B B MODEL VCS331 VCS332 TERMINATION T = lead (Pb)-free None = tin/lead alloy RESISTANCE VALUE 0.25 TOLERANCE B = 0.1 % D = 0.5 % F = 1.0 % G = 2.0 % J = 5.0 % PACKAGING B = Bulk Pack Note (1) For non-standard requests, please contact application engineering Document Number: 63153 Revision: 29-Mar-10 For any questions, contact: foil@vishaypg.com www.foilresistors.com 3 Legal Disclaimer Notice Vishay Precision Group Disclaimer ALL PRODUCTS, PRODUCT SPECIFICATIONS AND DATA ARE SUBJECT TO CHANGE WITHOUT NOTICE. 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