TE Connectivity – Current Sensing Resistors Deliver Solutions Over Wide Resistance, Power and Size Ranges

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When designing power supplies and regulated battery circuits, the aim is to eliminate the risk of short circuits or overcurrent conditions which are likely to damage other components. TE Connectivity’s current sense resistors are a simple and economic solution.

What is a Current Sensing Resistor?

Current sensing products are established industry favorites among resistive products which, as with most common passive products, the majority are surface mount. These resistors, sometimes referred to as ‘shunt’ resistors, are used to monitor the current in a circuit and translate the amount of current in that circuit into a voltage that can be easily measured and monitored. Such resistors have very low resistance values, typically less than 100mΩ (0.1Ω).

How Do They Work?

As stated by Ohm’s Law, there is a voltage drop across any resistance when current is flowing. A current sensing resistor is designed for low resistance so as to minimize power consumption. As a result, the calibrated resistance senses the current flowing through it in the form of a voltage drop which is detected and monitored by the control circuitry.

FEATURES

  • Temperature range: -55°C to +170°C
  • Climatic category: 55°C/125°C/55°C
  • Tolerances at 1% and 5% as standard
  • TCR ranging from 600ppm to 50ppm

APPLICATIONS

  • Power management applications
  • Instrumentation
  • Industrial controls
  • Smart metering
  • Automotive engine control
  • Power supplies
  • LED lighting control

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