CR7SFT-251

Overview

The CR7SFT-251 is a commercial grade AC current transformer manufactured by CR Magnetics Inc. It features a solid core design with a 2.5-inch inner diameter, supporting an input range of 0 to 250 AAC and an output range of 0 to 5AAC. The device operates within a frequency range of 50Hz to 400Hz and utilizes a 250:5 current ratio. It is designed for chassis mounting and includes two #8-32 terminals for electrical connections.

Feature Summary

• Non-invasive solid core construction for direct conductor insertion
• Chassis mount configuration with standard terminal hardware
• Commercial class performance suitable for general industrial applications

Applications

• AC current sensing in power distribution systems
• Industrial equipment monitoring and control
• Electrical panel metering and protection circuits

Procurement Notes

Verify the specific datasheet version from CR Magnetics Inc. to confirm terminal specifications and insulation ratings. Ensure the application environment falls within the commercial grade temperature and humidity limits defined in the official documentation. Cross-reference the 250:5 ratio with system requirements to guarantee accurate signal scaling for downstream measurement devices.

Selection Notes

Select this model when a non-invasive solution is required for conductors up to 2.5 inches in diameter. The 250:5 ratio suits applications where a 5A secondary output is compatible with existing instrumentation. Consider the chassis mount style for fixed installations rather than PCB integration. Validate that the operating frequency remains between 50Hz and 400Hz for optimal accuracy.

Part Context

This component belongs to the CR Magnetics SFT series of current sense transformers. These units are designed for robust industrial use, offering reliable isolation between primary conductors and secondary measurement circuits. The series provides various aperture sizes and ratios to accommodate different current levels and physical constraints in electrical assemblies.

Replacement Considerations

Direct substitutes include other CR Magnetics models with matching 250:5 ratios and similar physical dimensions. Verify compatibility with existing mounting hardware and terminal configurations before replacement. Alternative manufacturers may offer comparable specifications but require validation of footprint and electrical characteristics.