CR45-A

Current Sense Transformers Overview

The CR45-A is a wire-mounted electrical current indicator from the CR Magnetics CR45 series. It functions as a non-invasive solid core current sense transformer designed for panel mounting. The device features an amber LED output that activates at a full-on point of 2.0 AAC. It has a center opening ID of 0.31 inches and operates within a frequency range of 50Hz to 1kHz. The unit measures 0.949 inches in length by 0.461 inches in width.

Current Sense Transformers Feature Summary

• Non-contact, isolated measurement capability using a solid core design
• Visual indication via amber LED for current presence detection
• Panel mount construction for secure installation

Current Sense Transformers Applications

• Remote monitoring of electrical loads
• Input to electrical control systems
• Detection of open heater elements
• Phase loss indication
• Motor operation monitoring

Current Sense Transformers Procurement Notes

Verify the specific model suffix against official datasheets to ensure correct LED color and current threshold specifications. Confirm physical dimensions and mounting requirements match the intended panel cutout. Ensure the primary conductor size fits within the specified 0.31-inch inner diameter opening. Cross-reference the frequency range with the application signal to guarantee accurate sensing performance.

Current Sense Transformers Selection Notes

Select this component when a visual, non-invasive current presence indicator is required for AC circuits. The 2.0 AAC full-on point defines the activation threshold for the LED output. Consider the 0.31-inch opening size when choosing conductors or busbars. The panel mount style dictates the mechanical integration method compared to wire-wound alternatives.

Current Sense Transformers Part Context

This part belongs to the CR45 series of rugged wire lead current transformers released by CR Magnetics. The series provides versatile solutions for converting AC input current into proportional outputs. These sensors are installed around current-carrying wires to provide isolated measurement capabilities without breaking the circuit continuity.

Current Sense Transformers Replacement Considerations

Substitute parts must maintain the 0.31-inch ID and panel mount form factor. Verify that replacement units support the 50Hz-1kHz frequency range. Ensure the new component offers comparable isolation voltage and LED activation thresholds to preserve system functionality.