CST206-3A-B

Overview

The Triad Magnetics CST206-3A-B is a board-mount current sense transformer designed for high-frequency applications. It features a 70 A current rating and a 300:1 turns ratio, with an inductance of 130 mH. The component operates within a frequency range of 20 kHz to 250 kHz and utilizes radial through-hole termination. Physical dimensions include a length of 27.3 mm, width of 10.16 mm, and height of 31.11 mm, with a core size of 9.14 mm.

Feature Summary

• Provides precise current sensing via a 300:1 turns ratio
• Supports high primary current up to 70 A
• Operates effectively in high-frequency switching environments

Applications

• Switch-mode power supply (SMPS) output current monitoring
• Inverter and motor drive current feedback loops
• High-frequency DC-DC converter protection circuits

Procurement Notes

Verify the specific suffix against official Triad Magnetics documentation to confirm electrical tolerances and physical variations. Ensure the procurement channel provides valid manufacturer traceability. Confirm RoHS compliance status directly from the latest datasheet revision before integration into regulated designs.

Selection Notes

Select this component when a 70 A primary current capacity and 300:1 transformation ratio are required. The 20 kHz to 250 kHz operating range suits high-frequency switching topologies. Verify that the radial through-hole package fits the PCB layout constraints and that the 130 mH inductance meets the circuit's magnetizing current requirements.

Part Context

This part belongs to the CST206 series of current sense transformers from Triad Magnetics. The series offers various ratios and ratings for different current levels. The CST206-3A-B specifically targets higher current applications compared to lower-rated siblings in the same family, maintaining consistent form factors for design flexibility.

Replacement Considerations

Direct substitutes must match the 300:1 ratio, 70 A rating, and 130 mH inductance. Verify pinout compatibility and core size (9.14 mm) for mechanical fit. Consult Triad Magnetics for approved cross-references or updated model numbers.