ECST1V0703-1070-R

Overview

The ECST1V0703-1070-R is a surface-mount current sense transformer from Eaton Electronics, designed for high-frequency applications. It features a 70:1 turns ratio and supports a primary current rating of 9 A. The device operates within a frequency range of 50 kHz to 1 MHz. Key electrical specifications include a maximum primary inductance of 652 µH, a primary resistance of 1.5 mΩ, and a secondary resistance of 5.04 Ω. The component utilizes an SMD package with dimensions of 7.2 mm length, 5.2 mm width, and 3 mm height. It is rated for operation between -40°C and +125°C.

Feature Summary

• Provides galvanic isolation between primary and secondary circuits for accurate current monitoring.
• Optimized for high-frequency signal integrity within the 50 kHz to 1 MHz operational band.
• Engineered for surface-mount technology (SMT) integration to support automated PCB assembly processes.

Applications

• Current sensing in switch-mode power supplies (SMPS).
• Overcurrent protection circuits in industrial control systems.
• Feedback loop monitoring in DC-DC converter modules.

Procurement Notes

Verify that the specific part number matches the required 70:1 turns ratio and 9 A primary current rating for your design. Confirm that the operating temperature range of -40°C to +125°C aligns with your environmental requirements. Ensure the SMD footprint dimensions are compatible with your PCB layout constraints. Cross-reference the datasheet for precise inductance tolerances and resistance values before finalizing the bill of materials.

Selection Notes

Select this component when a high turns ratio is necessary to step down primary current for safe measurement by low-voltage sensing ICs. The wide frequency range makes it suitable for modern high-speed switching converters. Consider the physical size and mounting style if space is limited on the target circuit board. Evaluate the thermal performance to ensure reliable operation under continuous load conditions within the specified temperature limits.

Part Context

This component belongs to the ECST series of current sense transformers manufactured by Eaton Electronics. The series is characterized by its compact surface-mount form factor and suitability for high-frequency applications. These transformers are engineered to provide reliable isolation and accurate current feedback in demanding electronic environments.

Replacement Considerations

Direct substitutes must maintain the 70:1 turns ratio, 9 A primary rating, and similar frequency response characteristics. Verify that any alternative component offers comparable isolation voltage and fits the same SMD footprint without mechanical interference.