Y44870R04800B0W

CSM2512S Bulk Metal® Technology High Precision, Current Sensing, Power Surface Mount, Metal Strip Resistor with Improved Stability 0.05 %, Resistance Value from 10 m, Rated Power to 1 W and TCR to 0 ± 15 ppm/°C FEATURES The CSM’s series of low value current sense resistors provides power and precision in a four terminal, surface mount configuration. Its all welded construction is made up of a Bulk Metal® resistive element with plated copper terminations. Vishay Foil Resistors’ application engineering department is available to advise and make recommendations. For non-standard technical requirements and special applications, please contact foil@vpgsensors.com. B C R I FIGURE 1 - POWER DERATING CURVE + 70 °C D 100 Rated Power (%) A I  Temperature coefficient of resistance (TCR): (- 55 °C to + 125 °C, + 25 °C ref.) ± 15 ppm/°C maximum ± 10 ppm/°C maximum on special request  Load life stability to ± 0.05 % (70 °C, 2000 h at rated power)  Power rating: 1 W  Resistance tolerance: ± 0.1 %  Resistance range: 10 m to 100 m  Vishay Foil resistors are not restricted to standard values, we can supply specific “as required” values at no extra cost or delivery (e.g. 10.2345 m vs. 10 m)  Short time overload: ± 0.1 % typical  Thermal EMF: < 3 µV/°C  Maximum current: up to 10 A  Surface mount configuration  Four terminal (Kelvin) design: allows for precision accurate measurements  Terminal finishes available: lead (Pb)-free, tin/lead alloy  Screening in accordance with EEE-INST002 available (Per MIL-PRF-55342 and MIL-PRF-49465; see datasheets of 303144 and 303145 )  Prototype quantities available in just 5 working days or sooner. For more information, please contact foil@vpgsensors.com  For better performances please contact Application Engineering V Z in ~ =∞ 80 60 40 20 0 - 65 - 50 - 25 0 25 50 75 100 125 150 170 Ambient Temperature (°C) TABLE 1 - PERFORMANCE SPECIFICATIONS PARAMETER CSM2512S Resistance Range 10 m to 100 m Power Rating at 70 °C 1W Maximum Current 10 A (P x R)1/2 Maximum Working Voltage Tightest Tolerance ± 0.1 % Temperature Coefficient Maximum (- 55 °C to + 125 °C, + 25 °C ref.) Operating Temperature Range ± 15 ppm/°C, ± 10 ppm/°C is available - 65 °C to + 170 °C Weight (maximum) 0.09 g * Pb containing terminations are RoHS compliant, exemptions may apply Document Number: 63145 Revision: 4-Mar-15 For any questions, contact foil@vpgsensors.com www.vishayfoilresistors.com 1 CSM2512S ABOUT CSM (Low Ohm Value 10 m to 100 m) The CSM2512S series of low value current sense resistors provides power and precision in a four terminal, surface mount configuration. Its all welded construction is made up of a Bulk Metal® resistive element with plated copper terminations. For low value resistors in precision applications it is necessary to use four-terminal Kelvin connections to obtain a precise voltage drop across the resistive element. In these applications, the contact resistance and the terminal resistance may have the same order of magnitude or be even greater than that of the element resistance itself. Thus, significant error is introduced because the high temperature coefficient of resistance of the leads and the contact resistance are unavoidably incorporated into the measurements when the current sense resistor has only two leads. Because the ability to measure low values to tolerances of 0.1% or tighter is a concern to both the manufacturer and the user, many situations require coordination of measurement standards between both parties. Coordination is often accomplished by exchange of serialized units with recorded readings to align measurement practices and specific reference standards. The problem is compounded when high-precision current sensors under moderate to high power experience self-heating (Joule effect) which causes the in-service resistance value to be different from that obtained using low current measurement equipment. Therefore, the measurement conditions must be defined and accepted at the time of spec preparation-that is, resistance value as determined by specified current and measured IR-drop following a specified period of stabilization. Measurement equipment is available from a number of sources with varying stated accuracies. Traditional passive current sensors and shunts generate heat under power, which changes their resistance, and thus their voltage output. The CSM’s low absolute TCR reduces errors due to temperature gradients, thus reducing a major source of uncertainty in current measurement. The CSM can withstand unconventional environmental conditions, including the extremely high temperatures and radiation-rich environments of down-hole oil exploration and well logging, or the deep-sea underwater repeaters in cross-ocean communications. The stability of the CSM can be further enhanced by post-manufacturing operations (PMO), such as temperature cycling, short-time overload, and accelerated load life which are uniquely applicable to Bulk Metal® Foil resistors. The device features a low thermal electromotive force (EMF) that is critical in many precision applications. Thermal EMF in DC applications induces a voltage offset in the resistor that is equivalent to adding a small battery into the circuit. element, thereby minimizing temperature variations. Also, the resistor element is designed to uniformly dissipate power without creating hot spots, and the welded terminations material is compatible with the element material. These design factors result in a very low thermal-EMF(