Compact Current Sensor – UCT-0300 by Magnelab

Product Description

Magnelab’s UCT-0300 is a compact current sensor with a 0.3″ opening and high accuracy.

The UCT-0300 is a solid core current transformer that complies with ANSI C57.13 0.6 Class and has a phase angle measurement better than 1˚. The output is controlled by a precision resistor fixed at the industry standard of 0.333 Vac. The rugged epoxy encapsulated construction comes with 8′ twisted leads.

This compact current sensor is frequently used with:

  • New installations
  • Cost allocation
  • Precision power monitoring
  • Laboratories

When using rev grade current sensors like the UCT-0300, be sure when buying a meter to find an ANSI C12.20 Class 0.5S or better meter. The system is only as good as the weakest component!

The UCT-0300, like other current transformers, is used to determine the current (measured in Amps) passing through a conductor (wire, bus bar, etc). This is needed, along with the voltage, to determine the amount of power being used (measured in kW). Click here for more information on monitoring.

Compatible power meters accept a voltage input.  Look for meters on our website that start with this symbol:


You can view all of our current sensors here.


  • Rated input up to 30 Amp
  • Output 0.333 Volt AC at rated current
  • Linearity accuracy +/- 0.5%Accuracy at 10% to 130% of rated current
  • Phase angle < 1° measured at 50% rated current
  • Operates from 30 Hz to 1,000 Hz
  • 8 ft. twisted-pair lead
  • Maximum Voltage: 600 V (on bare conductor)
  • UL recognized, CE, and RoHS compliant
  • 7-Year Warranty

Data Sheet

 Technical Specs


UL Registered


Made in USA

ISO 9001

rohs compliant

Additional information

Weight.23 lbs
Dimensions4.5 x 4.5 x .75 in