CR8449-2000

Overview

The CR8449-2000 is a current sense transformer from the CR Magnetics Inc. CR8400 series, designed for non-invasive current monitoring in electronic circuits. It features a solid core construction with a turns ratio of 2000:1 and supports primary currents up to 75 A. The device operates within a frequency range of 20 Hz to 200 kHz, ensuring accurate signal reproduction across this bandwidth. With a secondary DC resistance of 109 Ohms, it is optimized for integration into measurement systems requiring high isolation and low insertion loss.

Feature Summary

• Non-invasive solid core design allows installation without breaking the primary conductor
• High turns ratio of 2000:1 provides precise current scaling for sensitive measurement loads
• Wide frequency response supports applications ranging from power line frequencies to high-frequency switching signals

Applications

• Current monitoring in motor drive systems
• Power quality analysis in industrial equipment
• Feedback control loops in switching power supplies

Procurement Notes

Verify the specific suffix variant (e.g., -F or -DG) against the required termination style, as lead types differ between wire leads and pin configurations. Confirm that the 75 A primary rating aligns with the maximum expected load current to prevent saturation. Ensure the operating frequency range covers the fundamental and harmonic content of the target application signal.

Selection Notes

Select this component when a high-ratio transformer is needed for low-current secondary side processing of high-amplitude primary signals. The 2000:1 ratio is suitable for driving precision rectifiers or ADC front-ends directly. Consider the physical mounting constraints, as the inline design requires specific clearance for the solid core passage.

Part Context

This part belongs to the CR8400 series of current sense transformers, which are characterized by their robust construction and wide bandwidth capabilities. The series offers various ratios and current ratings to accommodate different sensing requirements. The CR8449-2000 specifically targets applications demanding high accuracy at higher frequencies compared to standard power transformers.

Replacement Considerations

Direct substitutes include the CR8449-2000-F and CR8449-2000-DG, distinguished primarily by their termination styles. Verify compatibility before swapping, as lead configuration impacts PCB layout or wiring harness design.