CSM3637FCSM3637F Bulk Metal Foil TBulk Metalechnology High Pr Foil Technology High Precision, Current Sensing, Power Surface Mount Resistorecision, Current Sensing, Power Surface Mount Resistor with Rated Power up to 3 W and TCR 10 ppm/C FEATURES Temperature coefficient of resistance (TCR): 10 ppm/C max. (55C to +125C, +25C ref.) For tighter TCR please contact us. Power rating: 3 W Resistance tolerance: to 0.1% Top View Bottom View Resistance range: 20 m to 200 m Load-life stability: to 0.05% typical BC (70C, 2000 h at rated power) R Short-time overload: 0.02% typical I I Power coefficient of resistance (PCR), R due to self A D heating: 5 ppm/W at rated power V Electrostatic discharge (ESD): at least to 25 kV ~ Zin = Solderable terminations Terminal finish available: lead (Pb)-free, tin/lead alloy Four terminal (Kelvin) design: allows for precise and accurate measurements. Quick prototype quantities available please contact foil vpgsensors.com Figure 1Power Derating Curve INTRODUCTION + 70 C 100 Model CSM3637F is a surface mount chip resistor designed with 4 pads for Kelvin connection. Utilizing 80 Bulk Metal Foil as the resistance element, it provides 60 enhanced characteristic capabilities resulting in superior performance when compared with other 40 resistor technologies. The unique combination of Z Foil 20 technology along with the designed 4 pads lead frame 0 configuration results in significant reduction of the 65 50 25 0255075 100 125 150 170 components sensitivity to applied power changes such Ambient Temperature (C) as power coefficient of resistance (PCR) and thermal resistance. Table 1Specifications Parameter Value (1) Resistance range 20 m to 200 m Power rating at 70C 2 W: 20 m to <50 m 3 W: 50 m to 200 m (2) Maximum current 10 A Tolerance 0.1 (3) Temperature coefficient maximum (55C to +125C, +25C Ref.) 15 ppm/C, R <100 m 10 ppm/C R 100 m Operating temperature range 65C to +170C 1/2 Maximum working voltage (P x R) Weight (maximum) 0.29 g Notes (1) Contact application engineering for values outside this range. (2) Maximum current for a given resistance value is calculated using I = P/R. (3) For tighter TCR, please contact application engineering: foil vpgsensors.com. Note * This datasheet provides information about parts that are RoHS-compliant and/or parts that are non-RoHS-compliant. For example, parts with lead (Pb) terminations are not RoHS compliant. Please see the information/tables in this datasheet for details. 9670-EN9670-EN For any questions, contact www.vishayfoilresistors.com Rev 01-Jul-2020Rev 01-Jul-2020 foil vpgsensors.com 1 Rated Power (%) H T L CSM3637F ABOUT CSM3637F The Key Applications The CSM3637F is a current sensing solution that was Applications requiring accuracy and repeatability under developed with a low TCR to meet demands for stable stress conditions such as the following: resistive product solutions in the industry. As it is critical Switching and linear power supplies for this resistor to reach thermal equilibrium quickly in Precision current-sensing circuits that require fast response or where the current changes swiftly, the CSM3637F is used where the Power management systems emphasis is on accuracy and repeatability under stress Feedback circuits conditions in applications requiring precision resistor Power amplifiers performance up to 3 W. Applications as EB systems, Measurement instrumentation switching power supplies, force-balanced scales all rely on current sense resistors to develop a precise voltage Precision instrumentation amplifiers proportional to the current. Medical and automatic test equipment The 4-pad CSM3637F Bulk Metal Foil surface mount Satellites and aerospace systems resistor features an improved load-life stability of max Commercial and Military avionics 0.05% at + 70C for 2000 h (rated power), a TCR of Test and measurement equipment 10 ppm/C maximum from 55C to +125C, +25C ref., Electronic scales and a tolerance of 0.1%. Figure 2Dimensions and Land Pattern in Inches (Millimeters) CSM3637F DIMENSIONS CSM3637F LAND PATTERN TOP VIEW BOTTOM VIEW Resistive element Lead frame Ceramic substrate E 1 I 1 E 2 c I 2 d b e a Kelvin Connection I , I Current 1 2 Note: Recommended stencil thickness 6 mil minimum. E , E Sense 1 2 DimensionsTolerances 0.010 (0.254) L W H T A B 0.365 (9.271) 0.375 (9.525) 0.040 (1.016) 0.091 (2.311) 0.058 (1.473) 0.040 (1.016) Land Pattern DimensionsTolerances 0.003 (0.076) a b c d e 0.116 (2.95) 0.390 (9.91) 0.066 (1.68) 0.024 (0.610) 0.178 (4.52) www.vishayfoilresistors.com For any questions, contact 9670-EN 2 foil vpgsensors.com Rev 01-Jul-2020 A Terminals W B