The resistor portfolio ranges from Riedon's economical bare metal element MSR series through to the company's CLSA series chip resistors.
Utilizing various technologies, Riedon offers ±1% tolerance resistances from 0.5 milliohms up to 1 ohm in various package formats with TCRs as low as ±20 ppm/°C and power ratings up to 5 W. 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/°C). 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: the company's 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°C to +155°C, with the CLSA parts meeting the Automotive Engineering Council’s AEC-Q200 stress test qualification.
“Current sensing applications insert a low ohmic precision resistor in series with the load current, creating a small voltage drop that can be readily measured and used to calculate the current flowing through the resistor”, explained Phil Ebbert, Riedon’s VP of Engineering, “Resistance values of just a few milliohms allow currents of several Amps, even tens of Amps, to be handled with device power ratings up to 5 Watts. Riedon’s capability to produce such low ohmic values, with well defined