The Component Highlights series provides a rundown of a component's specs and intended applications.

Coilcraft CST2020 Series

Coilcraft CST2020 Series current sense transformers can be used to sense currents up to 40 A at frequencies from 400 Hz to 1 MHz. The transformers also offer 4000 Vrms isolation between sense and output pins and meet the reinforced insulation requirements of UL60950-1. The transforms have low primary side resistance and are available with turns ratios from 1:70 to 1:300, allowing designers to select a terminating resistor and generate a measurement voltage appropriate to their application.

The CST2020 series is AEC-Q200 Grade 1 qualified and well-suited for use in traction motor, battery management, and 48 V vehicle systems in addition to aerospace power management, three-phase solar inverters, industrial motor controls, and other high current applications requiring high isolation between the sensed current and measurement circuitry. 

  • Sensed current up to 40 A @ 400 Hz to 1 MHz
  • 4000 Vrms, one-minute isolation (hipot) between windings
  • Meets Reinforced Insulation per UL 60950-1
  • Very low primary DC resistance – 0.84 mΩ
  • Turns ratios: 1:70, 1:100, 1:200, 1:300
  • AEC-Q200 Grade 1 qualified (-40°C to +125°C ambient)

More Information


New Industry Products are a form of content that allows industry partners to share useful news, messages, and technology with All About Circuits readers in a way editorial content is not well suited to. All New Industry Products are subject to strict editorial guidelines with the intention of offering readers useful news, technical expertise, or stories. The viewpoints and opinions expressed in New Industry Products are those of the partner and not necessarily those of All About Circuits or its writers.