40A Current Transformer


  • Solid core current transformer for the most demanding accuracy.
  • For circuits up to 40A.
  • Connects JBox to CircuitMeter products.


The CurrentTransformer (40A-Solid) is used for circuits up to 40A.

This current transformer meets three key criterias:

  • high accuracy
  • industry approvals
  • low cost

This series of solid core current transformers is simple and designed for connection to the JBox products from CircuitMeter. They will meet the most demanding accuracy requirements. Installing these CTs requires a shutdown of the circuit involved.

Use a split-core CT when you are unable to shut down a circuit.

Electrical Specifications¹

Maximum Current 40A
Output 20mA
Accuracy Class 0.1
Type Solid Core

Safety Specifications

Measurement Category CAT III, 600VAC
RoHS Compliant
Safety Standards UL 61010-1
CAN/CSA C22.2 31010-1
EN 61010-1, IEC 61010-2-032

Mechanical & Dimensions

CaseMaterial UL 94V-0
Secondary Wire 1.5M (5.0 ft)
UL 1015 (TEW)
600V, 105ºC
Operating Temperature 5 to 40ºC
Storage Temperature -20 to 85ºC
Dimension 25 x 24 mm / 0.98 x 0.95 in
Height 11 mm / 0.43 in
Centre Hole 6.5 mm / 0.26 in


The CT040A is standard with the WebMeter36F Kit
  ¹ For use on insulated conductors only

Additional information