Based on this product's specifications, here are some alternatives and similar models
Current transformer Rittal SV 9677.875, nominal current output 400 A, conductor Ø 2.5–4 mm, black
Summary description:
Rittal SV 9677.875 is a current transformer designed for measurement and monitoring with a nominal current output of 400 A. The unit is black, accepts conductor diameters from 2.5 to 4 mm, and weighs 130 g. Suited for integration into electrical panels and switchgear for current sensing, protection circuits, and energy monitoring applications.