Split-Core Current Transformer With 333mV Output


The Smartenit Split-Core Current Transformers provide a low-cost and accurate method to sense electrical current. A hinge and locking snap allows non-invasive attachment to the current-carrying wire. High secondary turns develop a 0-333mV signal suitable to any of our meters such as the IoTeMtr and other 3rd party devices. Select the measuring range you need from the options below.


Use these current transformers (CTs) with our energy meters such as our versatile 6-channel wireless IoTeMtr.  These devices also work with any meter that has a 333mV CT input.

  • Available to measure many AC current ranges, from 30A to 200A
  • 333mV output for all ranges enables compatibility with many meters and eliminates need for burden resistors
  • Twisted Pair, 22AWG leads extend 6 feet
  • Easy installation – simply open the split-core and snap the CT around the wire to be monitored
  • Connects to Smartenit meters with  detachable screw terminal strip that accepts 24AWG to 18AWG wire.

Additional information

Weight N/A
Dimensions N/A


  • Monitor the AC current on an electrical load
  • Identify how energy is being used throughout the home/building to make energy saving decisions
  • Make any electrical panel smart. Monitor whole panel or individual circuits.
  • Designed to install around primary conductors without disconnecting wires or breaking the circuit to be monitored. Simply open and snap the CT around the wire.



Rated current5A to 600A
Rated output333mV (AC)
AccuracyClass 0.5 or 1 from 20% to 120% of rated current
Phase angle< 2 degrees at 50% of rated current
Insulation voltage600VAC
Maximum primary voltage500VAC (Insulated Conductor)
Dielectric strength2.5KV / 1mA / 1 min
Case materialPC / UL94-V0
LeadsUL 1015, Twisted Pair, 22 AWG
Operating temperature15C to 60C
Operating humidity< 85%


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