CT-0200-D10

Overview

The Littelfuse CT-0200-D10 is a current sense transformer designed for industrial control applications. It features a 200:5 current ratio and a donut-style core with a 1-inch window diameter, allowing for non-invasive installation around conductors. The unit operates within 24VAC control circuits and supports free-hanging or in-line mounting configurations. This component integrates delay-on-make and delay-on-break time delay functions into a single unit, facilitating precise timing sequences in heating and cooling systems without requiring external timing modules.

Feature Summary

• Integrates delay-on-make and delay-on-break time delay functions within a single unit
• Features a donut-style solid core design for non-invasive conductor sensing
• Supports free-hanging or in-line mounting for flexible installation
• Operates specifically within 24VAC control circuit environments

Applications

• Control fan delays in heating equipment
• Control fan delays in cooling equipment
• Sequential operation of multiple electrical loads such as electric heating elements
• Ordered running of identical loads in HVAC systems

Procurement Notes

Verify the specific ordering suffix to ensure compatibility with required voltage ratings and mounting styles. Confirm that the application environment remains within the specified 24VAC operational limits. Check datasheet for any updates regarding RoHS compliance status or pinout configurations if integrating into existing PCB layouts. Ensure the conductor size fits within the 1-inch window aperture for proper sensor function.

Selection Notes

Select this model when a combined make/break delay function is required for load sequencing. Choose based on the 200:5 transformation ratio to match secondary metering or relay input requirements. Consider the donut form factor for retrofit installations where breaking primary circuits is not feasible. Verify that the physical dimensions accommodate the available space in the control panel enclosure.

Part Context

This component belongs to the Littelfuse CT Series of current transformers. These units are engineered to combine sensing capabilities with built-in timing mechanisms. The series is commonly utilized in commercial HVAC and industrial control panels to manage startup sequences and prevent simultaneous high-current draws from multiple heating or cooling elements.

Replacement Considerations

Cross-reference part number CT-0200-F10 for a footed variant with identical electrical specifications. Verify that substitute models maintain the same 200:5 ratio and 1-inch window dimension. Ensure replacement units support the same 24VAC operating voltage and delay functionality.