Precision Resistor Company
10601 75th Street N., Largo, 33777, Florida, United States
CALL US: +1.727-541-5771
Email: [email protected]
Lower self-heating - Low temperature rise per watt, Low TCR, and Low EMF for greater thermal stability
Durable - Excellent overload and surge current handling capabilities.
Dependable and repeatable measurements under load-Without this feature the voltage drop across a low value element will no longer be a linear function of current.
Thru-Hole or SMD Designs - are ideal in amplifier circuits and accurate voltage drop applications. They also offer excellent thermal transfer to base and better overload and surge current handling capabilities
Hot-Tinned Copper Terminals - for better solder wetting, longer shelf life and higher current-carrying capacities.
Lower Ohmic Values - to one milliohm (0.001) ... and closer resistance tolerances to ±0.005%.
Very Low TCR Characteristics-0±15ppm (Standard) and Special TCRs to 0±10ppm for operation over a wider temperature span and provide greater stability under load
Low Thermal EMF Construction - 1microvolt/°C. with respect to the copper terminals. This low EMF construction together with PRC's "single-joint" 4-terminal design will eliminate "lead-out" resistance variations, contact resistance and annoying thermal electric effects generally associated with very low resistance values.
Premium Parts - All these design features combined enable all our parts to perform flawlessly, to ensure your precision application will do the same.
Importance of Stability vs. Time-Stability is the quality to resist permanent change ... and must be designed into the parts from the start. It is very difficult to stabilize or condition a general-purpose resistor and be confident that it will meet a critical application. All stability specs at PRC are designed for precise requirements - even if you specify 1% resistance tolerances. Low EMF construction with respect to the copper terminals is Standard at PRC. Many low value tin oxide designs have thermocouple errors as large as 100 microvolts per degree C. which could degrade circuit performance. Try to avoid thermal gradients that could cause a large temperature difference across the low value resistor ... and specify with low EMF construction. Be sure to "Heat Test" all delicate SMDs that will be exposed to temperatures above +125°C.
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