Current Sensing TCR Resistors

current sensing tcr resistors Vishay Foil powers current-sensing TCR resistors were developed with a low absolute TCR and Kelvin connection to meet demands for new and stable resistive product solutions in the industry today. These resistors are most-often used to monitor a current that is directly proportional to some physical characteristic (such as pressure, weight, etc.) being measured by an analog sensor. The TCR resistors converts the current to a voltage that is representative of the physical characteristic and feeds that voltage into control circuits, instrumentation, or other indicators. Deviations induced in the resistor, not representative of the monitored characteristic, can be caused by high absolute TCR response to both ambient temperature and selfheating and can feed erroneous signals into the system. Resistance is usually kept low to reduce the self-heating (Joule effect) portion of the error while minimizing the stresses that cause long-term resistance changes. It is critical for this resistor to reach thermal equilibrium quickly in circuits that require fast response or where the current changes quickly. Thermal EMF is another important consideration in low ohmic current sensing resistors used mostly in DC circuits (there is no effect in AC circuitry). Vishay Foil resistors are able to minimize this effect through the use of appropriate materials between the resistive layer and the terminations

Key Benefits

● Temperature Coefficient of Resistance (TCR): ❍ ±0.05 ppm/ºC (0ºC to +60ºC) typical with Z-Foil ❍ ±0.2 ppm/ºC (-55ºC to +125ºC, +25ºC ref.) typical with Z-Foil

● Power Coefficient (PCR) “∆R due to self heating”: 4 ppm/W or 5 ppm at rated power ● Resistance tolerance: absolute ±0.01% ● Power rating: up to 10 W on heat sink

● Current noise: 0.010 μVRMS/V of applied voltage (<-40 dB)

● 4 terminal (Kelvin) connections for high accuracy

● Vishay Foil resistors are not restricted to standard values; specific “as required” values can be supplied at no extra cost or delivery (e.g. 1K2345 vs. 1K)

● Load life stability: to ±0.005% at +25ºC, 2000 hours, at rated power

● Rise time: 1 ns without ringing

● Thermal stabilization time <1s (nominal value achieved within 10 ppm of steady state value

 

SeriesProductDescriptionResistance RangeToleranceTCR ppm/°CRated Power @70°CDatasheet
CSM2512 & CSM3637Metal strip chip resistorMetal strip chip resistor1mΩ to 200mΩ±0.1% to ±1%±15Up to 3WAdobe-PDF-Document-icon
CSM2512S &CSM3637SCurrent sensing chip resistorCurrent sensing chip resistor10mΩ to 100mΩ±0.1% to ±1%±15Up to 2WAdobe-PDF-Document-icon
CSM3637Pimproved power metal strip resistorimproved power metal strip resistor3mΩ to 100mΩ±0.1% to ±1%±15Up to 5WAdobe-PDF-Document-icon
CSM3637ZCurrent sensing chip resistorCurrent sensing chip resistor3mΩ to 50mΩ±0.1%±5Up to 3WAdobe-PDF-Document-icon
RBD, RBF & RBH Current Sensing Flip Chip ResistorCurrent Sensing Flip Chip Resistor0.001Ω to 1Ω±5%±101.5WAdobe-PDF-Document-icon
VCS1610Current Sensing Flip Chip Resistor4-terminal Current sensing chip resistor0.1Ω to 1Ω±0.5% to ±1%±20.25WAdobe-PDF-Document-icon
VCS1610ZCurrent Sensing Flip Chip Resistor4-terminal Current sensing chip resistor0.3Ω to 1Ω±0.5% to ±1%±0.20.25WAdobe-PDF-Document-icon
VCS1625Current Sensing Flip Chip Resistor4-terminal Current sensing chip resistor10mΩ to 10Ω±0.5% to ±2%±20.5WAdobe-PDF-Document-icon
VCS1625PCurrent Sensing Chip ResistorZ-foil current sensing chip resistor10mΩ to 10Ω±0.1% to ±2%±21WAdobe-PDF-Document-icon
VCS1625ZCurrent Sensing Chip ResistorZ-foil current sensing chip resistor0.3Ω to 10Ω±0.2% to ±2%±0.20.5WAdobe-PDF-Document-icon
VCS1625ZPCurrent Sensing Chip ResistorZ-foil current sensing chip resistor0.3Ω to 10KΩ±0.2% to ±2%±0.21WAdobe-PDF-Document-icon
VPR220S & VPR221Spower resistorTO-220 power resistor (2/4-terminal)5Ω to 10KΩ±0.01% to ±1%±28W on heat sink,1.5W in free air

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VPR220SZ &VPR221SZprecision power resistorTO-220 precision power resistors (2/4-terminal)5Ω to 10KΩ±0.01% to ±1%±0.28W on heat sink,1.5W in free air

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VCS201, VCS202 Conformally Coated Precision Current Sensing ResistorsConformally Coated Precision Current Sensing Resistors5mΩ to 0.2Ω±0.1% to ±5%±101.5W to 2WAdobe-PDF-Document-icon
VCS232Power current sensing resistorPower current sensing resistor0.2Ω to 500Ω±0.02% to ±5%±22WAdobe-PDF-Document-icon
VCS232ZPower current sensing resistorPower current sensing resistor0.25Ω to 500Ω±0.02% to ±1%±0.22WAdobe-PDF-Document-icon
VCS301, VCS302 4-Terminal power current sensing resistor4-Terminal power current sensing resistor5mΩ to 0.25Ω±0.5% to ±5%±310W on heat sink,3W in free airAdobe-PDF-Document-icon
VCS331, VCS332 4-Terminal power current sensing resistor4-Terminal power current sensing resistor0.25Ω to 500Ω±0.1% to ±5%±110W on heat sink,3W in free airAdobe-PDF-Document-icon
VFP3, VFP4 Molded Power Current Sensing ResistorsMolded Power Current Sensing Resistors50mΩ to 80KΩ±0.01% to ±5%±210W on heat sink,3W in free air

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VHP3, VHP4, VPR247 Hermetically Sealed Molded Power Current Sensing ResistorsHermetically Sealed Molded Power Current Sensing Resistors50mΩ to 80KΩ±0.01% to ±5%-10W on heat sink,3W in free airAdobe-PDF-Document-icon
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