CST306-3A

Overview

The CST306-3A is a through-hole current sense transformer manufactured by Triad Magnetics. It features an inductance of 55 mH and a maximum secondary resistance of 3.75 Ohms. The device supports a primary current rating of 25 A with a turns ratio of 200:1. It operates within a frequency range of 20 kHz to 200 kHz. Physical dimensions include a width of 9.78 mm, height of 23.24 mm, and core size of 4.57 mm.

Feature Summary

• Provides accurate current measurement via a 200:1 turns ratio
• Designed for through-hole PCB mounting with radial termination
• Operates effectively within the 20 kHz to 200 kHz frequency spectrum

Applications

• Current sensing in power supply circuits
• Feedback control loops in switching regulators
• Overcurrent protection monitoring systems

Procurement Notes

Verify the specific manufacturer part number CST306-3A against official Triad Magnetics documentation to ensure compatibility with your design requirements. Confirm that the 25 A current rating and 200:1 ratio align with your system's electrical parameters before finalizing procurement decisions.

Selection Notes

Select this component when a high turns ratio is required for precise low-current signal generation from higher primary currents. Ensure the operating frequency remains within the specified 20 kHz to 200 kHz range to maintain performance integrity and accuracy in current sensing applications.

Part Context

This component belongs to the CST series of current transformers from Triad Magnetics. These devices are engineered for board-mounted applications requiring reliable isolation and accurate current feedback. The series utilizes toroidal cores to minimize electromagnetic interference while maintaining compact physical profiles suitable for dense PCB layouts.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided data.