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Resistor with low TCR, inductance

Posted: 09 Jun 2005 ?? ?Print Version ?Bookmark and Share

Keywords:ohmite? 10 series? wirewound resistor? resistor?

Ohmite Mfg Co. has expanded its 10 series with the introduction of a new four-terminal wirewound resistor. These axial-leaded precision wirewound resistors are specifically designed for low-resistance applications that require high accuracy and high temperature stability.

This four-terminal version is specially designed for use in a Kelvin configuration, in which a current is applied through two opposite leads and the sensing voltage is measured across the other two leads. This design also results in a lower temperature coefficient of resistance (TCR) and lower self-heating drift, which may be experienced on two-terminal resistors.

Available in resistance values from 0.005 ohm to 0.100 ohm, the wirewound resistors offer a standard 1 percent tolerance, and low inductance of less than 0.25 ohms. Power ratings of 3-, 4 1/2-, and 7W are available as standard ratings. Compliant to the European Union's RoHS directive, the new devices feature tinned copper leads and exceed the requirements of MIL-PRF-49465. The operating temperature range is -55C to 75C.

Pricing ranges from $2.31 to $3.12 each in quantities of 500.

- Gina Roos


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