CR4120-5

Current Sensors Overview

The CR4120-5 is a True RMS AC current transducer designed for non-sinusoidal waveforms. It features a single-element solid core with a 0.79-inch window and an input range of 0 to 5 AAC. The device provides a ratiometric 4 to 20 mADC output signal. It operates on a 24 VDC power supply and supports frequencies from 20 Hz to 5 kHz. The unit offers high precision suitable for phase-fired control systems and can be mounted on a 35mm DIN rail or panel.

Current Sensors Feature Summary

• True RMS measurement capability for accurate readings of chopped wave and non-sinusoidal AC currents
• Single-element solid core design eliminating the need for external current transformers
• Dual mounting options including 35mm DIN rail and panel installation configurations

Current Sensors Applications

• Phase-fired controlled heating systems
• Quickly varying motor load monitoring
• Chopped waveform driver applications
• Harmonic current analysis in industrial environments

Current Sensors Procurement Notes

Verify that the specific part number CR4120-5 matches the required 0 to 5 Amp input range and 4 to 20 mA output configuration. Confirm the 24 VDC power requirement aligns with existing system infrastructure. Ensure the physical dimensions fit the designated DIN rail or panel space. Check regulatory compliance markings such as UL 61010B-1 recognition if required for your specific facility standards before finalizing the order.

Current Sensors Selection Notes

Select this model when precise measurement of distorted AC waveforms is critical, as standard transducers may fail in these conditions. The single-element design simplifies installation by removing the need for separate current transformers. Consider the 20 Hz to 5 kHz frequency range to ensure compatibility with the target application's signal speed. The ratiometric output ensures stability relative to the power supply voltage.

Current Sensors Part Context

This component belongs to the CR4100 Series of True RMS Current Transducers manufactured by CR Magnetics. The series is engineered for industrial accuracy where traditional sensors provide insufficient data due to complex waveforms. The CR4120 variant specifically utilizes a single-element core, distinguishing it from dual-element models like the CR4150 which handle different input ranges and window sizes within the same product family.

Current Sensors Replacement Considerations

Direct substitutes within the CR4100 series include models with adjusted input ranges, such as the CR4120-100 for higher amperage requirements. Verify that any replacement maintains the 4 to 20 mA output format and 24 VDC power specification to ensure interface compatibility without circuit modification.