Non-Magnetic, Non-Inductive Axial Lead Wirewound Resistors

Vishay Intertechnology, Inc. introduced a new series of non-magnetic, non-inductive axial lead wirewound resistors with high power ratings to 12 W and high-temperature operation to +350 °C, which is ideal for high-end audio and medical imaging equipment.

For radio frequency (RF) and operational amplifier applications, the non-magnetic and all-welded construction of the Vishay Mills MRA series devices, from the Vishay Dale Resistors division, greatly enhances frequency response. Combined with a non-inductive Ayrton-Perry winding, inductive reactance and signal loss are virtually eliminated. The resistors provide power ratings from 4 W to 12 W at 25 °C and temperature ranges from -65 °C to +250 °C (characteristic U) and -65 °C to +350 °C (characteristic V). The devices offer resistance from 0.01 ohms to 85.0 kohms, with tolerances of ± 1 %, ± 5 %, and ± 10 %, and TCR of ± 90 ppm/°C for resistance below 0.99 ohms ± 50 ppm/°C for resistance from 1.0 ohms to 9.9 ohms, and ± 30 ppm/°C for resistance of 10 ohms and above.

MRA resistors are RoHS-compliant and comply with Vishay Green standards.

Samples and production quantities of the MRA series are available now, with a lead time of six to eight weeks for larger orders. Pricing for U.S. delivery only starts at $1.40 per piece in 1,000-piece quantities.