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Four-terminal design allows precision sensing

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STACKPOLE Electronics Inc., represented in Australia by Multi Components Pty Ltd , has introduced a rugged new current sense resistor capable of carrying up to 100A of continuous current in applications that require high power dissipation with low resistance values.

Designated the HLD Series, these resistors feature a metal element with a four terminal 'Kelvin connection' designed to provide current-sensing capability with extremely low ohmic values down to 0.001Ω in tolerances to 1% with TCRs of 55ppm/°C. They are rated for operation from -55°C to +150°C.

The HLD Series has numerous advantages over competing technologies, according to Stackpole. Their high current rating enables them to be used in a wide range of power control circuits. The metal element is very rugged and its narrow construction saves board space compared to power wirewound resistors with similar ratings. The company states that this technology is much more cost effective than similar hall effect sensors.

The HLD Series of resistors are used in computers, servers and workstation applications plus power supplies and motor controls.

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