Power Electronics
Low Cost Current Sense Resistors

Low Cost Current Sense Resistors

A comprehensive portfolio of low ohmic value resistors from Riedon targets current sensing and shunt applications with its ranging from the economical bare metal element MSR series through to its CLSA series chip resistors that provide AEC-Q200 compliance for use in harsh automotive environments. Utilizing various technologies, Riedon offers ±1% tolerance resistances from 0.5 milliohms up to 1 Ω in various package formats with TCRs as low as  ±20 ppm/°C and power ratings up to 5 Watts. For tolerances down to ±0.1%, Riedon is also able to supply four terminal versions of its axial lead low ohm power resistor.

Riedon's MSR series uses a bare metal element in an all-welded construction for through-hole circuit board mounting to provide resistance values from 5 mΩ to 100 mΩ, while also achieving low inductance (<10 nH) and low TCR (±20 ppm/oC). MSR resistors are available in 1, 3 and 5-Watt power ratings with tolerances of ±1% or  ±5.  For surface mount applications, Riedon has several chip resistor solutions: its MNRS chip shunt resistors offer excellent long-term stability and low inductance with 4- and 6-Watt ratings and resistances from 1 mΩ to 4 mΩ; the CSR family of ultra low ohm metal strip chip resistors come in three sizes (1206 / 2010 / 2512) for power ratings from 1 to 3 Watts, with standard and customized resistance values from 0.5 mΩ to 15 mΩ; and featuring an alumina substrate for high power dissipation the CLS/CLSA series of chip resistors operate over -55 oC to +155 oC, with the CLSA parts meeting the Automotive Engineering Council's AEC-Q200 stress test qualification.

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