300 Series Vishay Foil Resistors Bulk Metal(R) Foil Technology Precision Current Sensing Resistors FEATURES * Low Ohmic Value: to 0.005 * Temperature Coefficient of Resistance: 15ppm/C at 0.005 * Tolerance: to 5% @ 0.005 (See Table 1) Product may not be to scale The 300 Series offers precision Bulk Metal Foil technology resistors as low as 5 milliohms with an extremely low 15 ppm/C temperature coefficient and unmatched long term stability. The 4 terminal current sensing resistors, when mounted on a heat sink, can sustain 10 watts continuously without an appreciable change in resistance. (0.15% maximum) The typical 50% derating of the power specification associated with other technologies is not necessary. A choice of lead configurations is available. THROUGH HOLE * Power Rating: 10 Watts at 25C on Heat Sink** 3 Watts at + 25C in Free Air (Further Derating Not Necessary) (R) * Load Life: 0.05% R @ + 25C, 2,000 Hrs., Rated Power * Isolated Heat Sink TABLE 1 - CHARACTERISTICS MODEL NUMBER VCS301 VCS302 RESISTANCE RANGE } 0.005 to 0.25 STANDARD RESISTANCE TOLERANCE%* 0.005 to < 0.1 0.1 to 0.25 1% 0.5% POWER RATING AT + 25C MAXIMUM CURRENT 10 Watts on Heat Sink** 15 Amps or VCS331 VCS332 } > 0.25 to 500 0.1% 3 Watts in Free Air 5 Amp * Tighter Resistance Tolerance - per request ** Heatsink - Aluminum (6 inches length x 4 inches width x 2 inches height x 0.04 inches thick) TABLE 2 - ORDERING INFORMATION Please specify Vishay 300 Series resistors as follows: VCS301, VCS302 VCS331, VCS332 0R0050 1.0% MODEL NO. RESISTANCE VALUE TOLERANCE SALES * ISRAEL: foilsales.israel@vishay.com * FRANCE/SWITZERLAND/SOUTHERN EUROPE: foilsales.eusouth@vishay.com * AMERICAS: foilsales.usa@vishay.com * ASIA/JAPAN: foilsales.asia@vishay.com * UK/HOLLAND/SCANDINAVIA: foilsales.eunorth@vishay.com * GERMANY/CZECH REPUBLIC/AUSTRIA: foilsales.eucentral@vishay.com For technical questions in the Americas, contact foilsupport1@vishay.com Document Number: 63018 For technical questions in Asia/Japan/Europe/Africa/Israel, contact foilsupport2@vishay.com Revision 09-Mar-05 www.vishay.com 113 300 Series Bulk Metal(R) Foil Technology Precision Current Sensing Resistors Vishay Foil Resistors FIGURE 1 - DIMENSIONS in inches (millimeters) AND SCHEMATIC Model VCS302 and VCS332 (Round Leads) Model VCS301 and VCS331 (E Lead Rectangular) W2 L1 D1 L2 L1 L2 W1 W1 H2 THROUGH HOLE H2 VISHAY VCS331 0R2000 1% B9825 H1 W2 D1 H1 D2 LL VISHAY VCS332 8R2000 0.1% B9825 D2 LL p t p LS LS LT I1 E1 E2 LT I2 MODEL L1 0.008 ( 0.2) L2 H1 H2 W1 W2 LL LS 0.008 Maximum 0.008 Maximum Maximum Minimum 0.020 ( 0.2) ( 0.2) ( 0.5) LT 0.020 ( 0.5) D1 D2 p Nominal Nominal Nominal t No VCS301 VCS331 1.340 (34.0) 0.701 (17.8) 1.063 (27.0) 0.197 (5.0) 0.210 (5.33) 0.087 (2.2) 0.216 (5.5) 0.689 (17.5) 1.083 (27.5) 0.138 (3.5) 0.040 (1.0) 0.040 (1.0) 0.016 (0.4) VCS302 VCS332 1.34 (34.0) 0.701 (17.8) 1.024 (26.0) 0.197 (5.0) 0.210 (5.33) 0.087 (2.2) 1.00 (25.4) 0.689 (17.5) 1.083 (27.5) 0.138 (3.5) 0.040 (1.0) 0.032 (0.8) - +100 +150 FIGURE 2 - POWER DERATING CURVE -55C +25C Percent of Rated Power +100 +75 +50 +25 0 -50 0 +50 +200 Ambient Temperature C (Further Derating Not Necessary) SALES * ISRAEL: foilsales.israel@vishay.com * FRANCE/SWITZERLAND/SOUTHERN EUROPE: foilsales.eusouth@vishay.com * AMERICAS: foilsales.usa@vishay.com * ASIA/JAPAN: foilsales.asia@vishay.com * UK/HOLLAND/SCANDINAVIA: foilsales.eunorth@vishay.com * GERMANY/CZECH REPUBLIC/AUSTRIA: foilsales.eucentral@vishay.com www.vishay.com 114 For technical questions in the Americas, contact foilsupport1@vishay.com Document Number: 63018 For technical questions in Asia/Japan/Europe/Africa/Israel, contact foilsupport2@vishay.com Revision 09-Mar-05 300 Series (R) Vishay Foil Resistors Bulk Metal Foil Technology Precision Current Sensing Resistors TABLE 3 - VISHAY VCS301, VCS302, VCS331, VCS332 PERFORMANCE TEST OR CONDITION VCS301, VCS302, VCS331, VCS332 PERFORMANCE* Maximum Ambient Temperature at Rated Power 25C Maximum Ambient Temperature at Zero Power 150C Temperature Coefficient 15ppm/C @ 0.005 (See Table below) 0.05% Short Time Overload 0.02% Terminal Strength 0.05% High Temperature Exposure THROUGH HOLE Thermal Shock 0.05% (2,000 hrs. @ 150C) Moisture Resistance 0.05% Low Temperature Storage 0.05% Shock (Specified Pulse) 0.1% Vibration (High Frequency) 0.1% Load Life (Rated Power, + 25C, 2,000 hrs.) 0.05% Resistance Tolerance 0.1%, 0.5%, 1%, 2%, 5% Thermal EMF 0.2V/C Max. (E Terminals) Weight 8.1 Grams Maximum Case Temperature Rise 17C/watt** (VCS301, VCS302) - 9C/watt** (VCS331, VCS332) Thermal Resistance 8C/watt** (VCS301, VCS302) - 12.5C/watt** (VCS331, VCS332) * R's plus additional 0.0005 ohm for measurement error. ** All measurements done in free air. TABLE 4 - TCR CHART (0C to + 60C no reference) 0.005 To < 0.01 15ppm/C 0.01 To < 0.05 10ppm/C 0.05 To < 0.2 5ppm/C 0.2 To < 1 3ppm/C 1 To 10 2ppm/C 10 1ppm/C SALES * ISRAEL: foilsales.israel@vishay.com * FRANCE/SWITZERLAND/SOUTHERN EUROPE: foilsales.eusouth@vishay.com * AMERICAS: foilsales.usa@vishay.com * ASIA/JAPAN: foilsales.asia@vishay.com * UK/HOLLAND/SCANDINAVIA: foilsales.eunorth@vishay.com * GERMANY/CZECH REPUBLIC/AUSTRIA: foilsales.eucentral@vishay.com For technical questions in the Americas, contact foilsupport1@vishay.com Document Number: 63018 For technical questions in Asia/Japan/Europe/Africa/Israel, contact foilsupport2@vishay.com Revision 09-Mar-05 www.vishay.com 115