Foil shunt resistors, rated 500W, for precision high-current measurement

Foil shunt resistors, rated 500W, for precision high-current measurement

New Products |
By Graham Prophet

Design of the FNP Series incorporates VPG’s proprietary Bulk Metal Foil technology for a low temperature coefficient of resistance (TCR) down to 0±1 ppm/°C, depending upon selected model. Integration of a Pt100 sensor within the FNP Series allows for accurate onboard temperature monitoring of the resistive element, with added performance stability. Units feature a maximum handling capability of 500W rated power, with no standard resistance value. An integral copper plate helps the FNP Series to achieve an improved thermal resistance specification of 0.1°C/W (0.3°C/W standard), while a resistance tolerance of 0.05% ensures minimized energy consumption. Standard resistance values of the FNP Series range from 0.001 ohm to 1 ohm, with improved maximum ambient temperature to +125°C (from +85°C) for conventional models.


These Bulk Metal Foil resistors have been deployed in applications, including automated test equipment (ATE); weighing scales; precision instrumentation; aerospace and military electronics; in-laboratory and metrology; industrial process control; high-end audio; and others. Use them, the company suggests, in any automotive, industrial, or power electronics application requiring the accurate detection of overcurrent conditions or remaining battery power levels. They may be specified within ATE, factory floor robotics, motor and drive controls, and medical diagnostics equipment, as well as used as both a precision high-voltage power supply output reference; or, as a high-accuracy reference for battery charge-discharge tests.


VPG Foil Resistors; and



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