CR4120-75

Current Sensors Overview

The CR4120-75 is a True RMS AC current transducer from the CR4100 series, designed for precise measurement of non-sinusoidal waveforms. It features a single-element solid core design with a 0.79-inch window and an input range of 0 to 75 AAC. The device provides a 4mA to 20mA output signal and operates on a 24V DC supply with a maximum current consumption of 70mA. It supports frequencies from 20Hz to 5kHz with ±0.5% accuracy and a 250ms response time. Mounting options include DIN rail or panel installation.

Current Sensors Feature Summary

• True RMS measurement capability for accurate reading of chopped waves and phase-fired control systems
• Single-element solid core construction with a 0.79-inch window for direct conductor insertion
• Dual mounting flexibility supporting both 35mm DIN rail and panel installation methods
• Bidirectional polarity detection for comprehensive AC current monitoring applications

Current Sensors Applications

• Phase fired controlled heater systems
• Quickly varying motor loads
• Industrial power monitoring where waveform distortion is present

Current Sensors Procurement Notes

Verify that the specific part number suffix matches the required input range and output configuration. Confirm that the solid core design aligns with the physical conductor size available in the installation environment. Ensure the 24V DC power supply specifications meet the system requirements for voltage stability and current capacity. Check regulatory compliance markings such as UL and CSA recognition if required for the target application region.

Current Sensors Selection Notes

Select this model when high accuracy is required for distorted AC waveforms rather than standard sinusoidal currents. The solid core design necessitates that the conductor can be threaded through the 0.79-inch window, unlike split-core alternatives. Consider the 4mA to 20mA output compatibility with existing PLC or data acquisition systems. Evaluate the operating temperature range of 0°C to 60°C against the environmental conditions of the installation site.

Current Sensors Part Context

This component belongs to the CR4100 series of True RMS Current Transducers and Transmitters by CR Magnetics. The series includes various models with different input ranges and element configurations, such as the CR4110 for single elements and CR4160 for two elements. The CR4120-75 specifically addresses the need for precise measurement in industrial environments with complex electrical loads.

Current Sensors FAQ

Is the CR4120-75 available in a split core design?

No, the CR4120-75 is a solid core transducer. Split core versions are available by adding an 'S' suffix to the prefix, but these are not UL recognized.

What is the maximum input current range for this model?

The CR4120-75 has an input range of 0 to 75 AAC.