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Current sense resistors, also known as shunt resistors, are devices that measure the flow of current. They detect current and convert it to a measured output voltage.
In general, current sense resistors are low-value, high-power resistors. They are built with low resistance to reduce power consumption and eliminate the risk of short circuits, which can damage other components.
Current sense resistors are typically installed in-line on the power source-to-load conduction path. The part is typically designed with extremely low resistance values to minimize voltage drop and power loss. Resistance values for current sense resistors are typically measured in milliohms.
They are frequently linked to amplifiers in order to reduce the impact of noise while maintaining certain levels of resolution. An isolation amplifier is used when the subsequent circuitry is at a different voltage than the current path.
This is not a required configuration, but deciding between isolated and non-isolated circuits is an important consideration when designing a current flow measurement system.
The Global Current Sensing Resistor market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2023 to 2030.
Recently, ROHM announced the availability of shunt resistors, GMR50 and PMR series, giving industry-leading 4W rated power (at electrode temperature TK=90°C) in the small 5.0mm2.5mm (2010 type packaging) dimension. It is perfect for current sensing in power supply and motor circuits used in industrial machinery and automotive systems.
GMR: High heat dissipation and outstanding dependability are the hallmarks of the GMR line of high power shunt resistors. Higher rated power in a small form factor is feasible by optimising the heat dissipation pathway.
Applications: Automotive (ECUs, EFI, motor peripheral circuits) (ECUs, EFI, motor peripheral circuits). Industrial (FA equipment, motor peripheral circuits, power supplies), (FA equipment, motor peripheral circuits, power supplies),enormous appliances (AC, washers, refrigerators).
PMR: Ultra-low-ohmic shunt resistors in the PMR series start at 1m. Low inductance enables high accuracy current detection, while the patented trim-less structure minimises heat concentration and lowers temperature rise. A wide range of sizes are available in the portfolio to accommodate various applications.
Applications: portable gadgets, notebook computers, electronic devices, Automotive (EPS, power supplies, motor detecting circuits), (EPS, power supplies, motor detection circuits), Industrial (inverters, power tools, base stations) (inverters, power tools, base stations)
The new Littelfuse CSR series of products sharpens the company’s focus on current and voltage monitoring while expanding its line of circuit protection solutions. Due to their high precision and low resistance rating, each of the eight CSRs is either a metal foil, metal strip, or metal plate resistor that is used to measure currents in circuits.
The YAGEO Group clients’ pursuit of downsizing in size and tolerance could not be satisfied by the conventional mechanical production process. In order to create a current sensor with a small size and high accuracy and a resistance value as low as 10–20 m, YAGEO developed and utilized multiple semi-conductor manufacturing technologies.
It also combines low thermal EMF (thermal EMF), high precision (1%), and low temperature coefficient of resistance (TCR 300ppm/°C). The PA0100 jumpers have a maximum rated current of 8 amps and are used as metal jumpers.
CTS’s electronic systems use current sensing resistors to measure the current flow by converting it into a voltage that can be easily measured and controlled by a current sense amplifier circuit. For circuit control, monitoring, and protection, this is a crucial component in power and instrumentation applications.
