CST-1020

Overview

The CST-1020 is a current sense transformer manufactured by Triad Magnetics, designed for non-invasive current monitoring in power systems. It operates at frequencies of 50 Hz to 60 Hz and supports a primary current rating of 20 A. The device features a turns ratio of 1:1000 and a secondary coil resistance of 40 ohms. Constructed with a solid core for encapsulated installation, it utilizes through-hole termination for secure PCB mounting. The component is suitable for industrial applications requiring reliable current sensing within the specified frequency range.

Feature Summary

• Non-invasive solid core design for safe current monitoring
• High isolation via 1:1000 turns ratio
• Through-hole mounting for robust PCB integration

Applications

• Industrial power supply current monitoring
• AC line current sensing circuits
• Power factor correction systems

Procurement Notes

Verify the specific suffix (e.g., -B) against official Triad Magnetics documentation to ensure correct packaging and variant matching. Confirm that the 20 A primary current rating aligns with your system's peak load requirements. Ensure the 50/60 Hz operating frequency matches your input source. Check mechanical dimensions for board space compatibility before finalizing procurement.

Selection Notes

Select this component when non-invasive AC current measurement is required without breaking the circuit. The 1:1000 ratio provides significant signal attenuation suitable for downstream processing. Ensure the 40 ohm secondary impedance is compatible with your sensing amplifier input. The through-hole package offers better mechanical stability than surface mount alternatives for high-current environments.

Part Context

The CST-1020 belongs to Triad Magnetics' CST series of current sense transformers. This series focuses on encapsulated, solid-core designs for general-purpose current monitoring. Unlike high-frequency variants, this model is optimized for low-frequency AC applications, distinguishing it from broader switching power supply components.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify pinout and electrical parameters if considering alternative manufacturers. Ensure any replacement maintains the 1:1000 ratio and 20 A primary rating.