CST306-3T-B

Overview

The CST306-3T-B is a current sense transformer manufactured by Triad Magnetics, designed for through-hole mounting. It features a non-invasive solid core construction with dimensions of 17.53 mm in length, 9.78 mm in width, and a maximum height of 23.24 mm. The component operates within a frequency range of 20 kHz to 200 kHz and supports a rated current of 25 A. Key electrical specifications include an inductance of 55 mH, a turns ratio of 200:1, and a maximum DC resistance of 3.75 ohms on the secondary side. It also provides an ET value of 2000 Vµs.

Feature Summary

• Non-invasive solid core design for accurate current sensing without circuit interruption
• Through-hole radial termination style for secure PCB integration
• Optimized performance within the 20 kHz to 200 kHz frequency range

Applications

• Current monitoring in switching power supplies
• Overcurrent protection circuits
• Power factor correction systems

Procurement Notes

Verify the specific suffix against official Triad Magnetics documentation to confirm exact electrical tolerances and packaging variations. Ensure the selected variant matches the required current rating and frequency response for the target application. Cross-reference the manufacturer part number with authorized distributors to confirm availability and compliance with relevant environmental standards such as RoHS.

Selection Notes

Select this component when a compact, high-current solution is required for frequencies up to 200 kHz. The 25 A rating and 200:1 turns ratio make it suitable for applications needing precise current feedback. Consider the physical dimensions and through-hole mounting requirements during PCB layout. Compare the 55 mH inductance and 3.75 ohm resistance against system impedance needs to ensure signal integrity.

Part Context

This component belongs to the CST series of current sense transformers from Triad Magnetics. These devices are engineered for reliable performance in power electronics applications requiring isolated current measurement. The series offers various ratings and configurations to accommodate different current levels and frequency ranges while maintaining a small footprint for space-constrained designs.

Replacement Considerations

Consult official substitution guides or datasheets for equivalent models from Triad Magnetics or other manufacturers. Verify that any alternative part matches the critical parameters of 25 A current rating, 200:1 turns ratio, and 20-200 kHz frequency range. Ensure mechanical compatibility regarding through-hole pin spacing and overall dimensions before implementation.