CT-0300-F20

Overview

The Littelfuse CT-0300-F20 is a solid core current transformer designed for industrial applications. It features a primary current rating of 300 A and a secondary output ratio of 300:5, delivering a standard 5 A signal. The device utilizes a foot mount style with terminal block termination for secure installation. It includes a 2-inch (50.8 mm) sensor hole window to accommodate busbars or cables. The unit is rated for 600 V operation and is constructed to operate within control circuits powered by 24VAC.

Feature Summary

• Solid core construction with a 2-inch sensor window for easy busbar insertion
• Foot mount design with terminal block termination for stable mounting
• Standardized 300:5 current ratio providing reliable 5A secondary output
• Rated for 600V systems and compatible with 24VAC control circuit environments

Applications

• Industrial current sensing and monitoring
• Control circuit integration for heating elements
• Air conditioning system load management
• Forced air heating system regulation

Procurement Notes

Verify the specific ordering suffix and package variant against the manufacturer's latest datasheet before procurement. Confirm that the terminal block type matches the existing panel layout requirements. Ensure the 600V insulation rating meets the safety standards of the target electrical system. Cross-reference the 300A primary rating with the maximum expected load to prevent saturation. Check for RoHS3 compliance if environmental regulations apply to the assembly.

Selection Notes

Select this model when a 300A primary capacity and 5A secondary output are required for industrial monitoring. The 2-inch window size dictates the physical cable or busbar dimensions allowed in the design. Foot mount configuration is necessary when vibration resistance and fixed positioning are critical. Verify compatibility with 24VAC control logic if integrating into automated sequencing systems.

Part Context

This component belongs to the Littelfuse SymCom CT Series of current transformers. These devices are engineered for robust performance in demanding industrial environments. The series provides standardized ratios and mounting styles to simplify integration into various power distribution and control architectures.

Replacement Considerations

Direct substitutes must match the 300:5 ratio, 300A rating, and 2-inch window dimension. Verify that alternative models support terminal block termination and foot mounting. Ensure voltage ratings meet or exceed 600V for safe operation in equivalent circuits.