CR8449-2000-F

Overview

The CR8449-2000-F is a high-frequency current sense transformer manufactured by CR Magnetics Inc. It features a solid core design 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 and has a secondary DC resistance of 109 Ohms. It utilizes wire lead termination for free-hanging installation, with physical dimensions of 31.80 mm in length and 26.00 mm in width.

Feature Summary

• Solid core construction for non-invasive current sensing
• High-frequency operation capability up to 200 kHz
• Wire lead termination style for flexible mounting

Applications

• Switch-mode power supply (SMPS) output current monitoring
• Inverter and motor drive current feedback loops
• High-frequency AC line current measurement systems

Procurement Notes

Verify the specific ordering suffix against manufacturer documentation to ensure correct termination and mechanical configuration. Confirm that the 75 A primary current rating aligns with the maximum expected load conditions in the target application circuit. Check RoHS compliance status if environmental regulations apply to the end product assembly process.

Selection Notes

Select this component when high-frequency response is critical for accurate current waveform reconstruction. Ensure the system's operating frequency falls within the specified 20 Hz to 200 kHz range. Verify that the 109 Ohm secondary impedance matches the input requirements of the downstream signal conditioning or amplification stage.

Part Context

This part belongs to the CR8449 series of high-performance microcontroller-compatible current transformers. The series is designed for applications requiring precise current isolation and measurement in compact spaces. The model number indicates a 2000:1 turns ratio, distinguishing it from other variants in the family with different ratios or current ratings.

Replacement Considerations

Direct substitutes must match the 2000:1 ratio, 75 A rating, and 109 Ohm secondary resistance. Verify dimensional compatibility for free-hanging installation. Cross-reference datasheets for equivalent frequency response characteristics.