ECST1V1308-1125-R

Overview

The ECST1V1308-1125-R is a surface-mount current sense transformer from Eaton Electronics, designed for high-frequency applications. It features a 15 A primary current rating and a 125:1 turns ratio. The component operates within a frequency range of 50 kHz to 1 MHz. Key electrical specifications include a maximum inductance of 8.7 mH, a primary resistance of 3.9 mOhms, and a secondary resistance of 5.2 Ohms. The device measures 13 mm in length, 11 mm in width, and 7.8 mm in height, supporting SMD/SMT installation.

Feature Summary

• Provides galvanic isolation between primary and secondary circuits for accurate current monitoring.
• Engineered for high-frequency operation up to 1 MHz with low parasitic effects.
• Utilizes a compact surface-mount footprint suitable for automated PCB assembly.

Applications

• High-current power supply feedback loops
• Motor drive current sensing
• Inverter protection circuits

Procurement Notes

Verify the specific part number suffix against official Eaton documentation to confirm the exact turns ratio and electrical characteristics. Ensure compatibility with peak current requirements and operating temperature ranges before integration. Confirm packaging details such as reel quantities directly with authorized distributors or the manufacturer to align with production volume needs.

Selection Notes

Select this component when a high turns ratio is required to step down large primary currents for safe sensing by lower-voltage control ICs. Consider the 15 A continuous rating and 8.7 mH maximum inductance limits during design. Evaluate the physical dimensions against available board space constraints and ensure the operating temperature range meets environmental conditions.

Part Context

This component belongs to the ECST1V1308 series of board-mount current transformers manufactured by Eaton Electronics. The series offers various turns ratios to accommodate different current sensing needs while maintaining a consistent physical form factor. These devices are engineered for reliability in demanding electronic environments requiring precise current monitoring.

Replacement Considerations

Direct substitutes include other models within the Eaton ECST1V1308 series with matching 125:1 ratios, such as ECST1V1308-1070-R or ECST1V1308-1125-R variants if available. Verify that alternative parts match the 15 A rating, 50 kHz–1 MHz frequency range, and physical dimensions to ensure mechanical and electrical compatibility without redesigning the PCB layout.