SCT-1250 Split-Core 1.25″ AC Current Sensor


50-800 Aac input : 333 mVac output. 1.25″ opening


SCT-1250 Split-Core Current Transformer

1.25″ AC Current Sensor

The SCT-1250 Split-Core Current Sensor Series transform an AC input current up to 800 Amps to an output of 0.333 Volts. Split-core transformers are ideal for installation on existing electrical wiring by snapping around the conductor.The SCT series have a self-locking mechanism.

SCT-1250 Split-Core Current Transformer

  • Rated input from 70 Amp to 800 Amp
  • Output 0.333 Volt AC at rated current
  • Operates from 50 Hz to 400 Hz
  • Phase angle < 2 degrees measured at 50% rated current
  • Linearity accuracy ± 1%
  • 8 ft. twisted-pair lead
  • UL recognized
  • Accuracy at 10% to 130% of rated current
  • Custom output and other parameters are available


Frequent Applications

  • Data logging
  • Recording
  • Power monitoring
  • Energy management
  • Cost allocation



The Magnelab SCT-1250 series is a popular and frequently used split core current sensing transformer. Designed to transform up to 800 amperes of AC input current into a 0.333 volt output, this AC current sensor is ideal in existing electrical wiring installations. In addition, it may simply and safely be snapped around a conductor that is already installed. At the same time, the SCT-1250 series comes with a self locking mechanism for added safety. It is most commonly used in recording, data logging, energy management, power monitoring and cost allocation. As split core current transformer manufacturers, Magnelab created a number of transformers, including the SCT-075H split core current transformer, which is similar to the SCT-1250 but has a rated current up to 200 amperes.

The SCT-1250 has a maximum of 800 Amps rated input and a 0.333 Volt output. At the same time, its linearity accuracy is impressive at 1% either way and this accuracy is at 10 percent to 130 percent of the rated current. The phase angle is less than 2 degrees. It operates within the frequency range of 50 Hz and 400 Hz and comes with a twisted pair lead measuring 8 foot in length. On a bare conductor, maximum voltage is 600 volts. In fact, the device is fully UL recognized and compliant with CE and RoHS standards. Finally, it comes with a 10 year warranty as standard to guarantee its quality.

For Bulk Orders Inquire by Phone or Email
01691 770 484



Additional information

Weight 0.4036972093 kg
Amp Rating

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Product Type

Current Sensor




0.333 Volt AC


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