CR9380-NPN

Current Sensors Overview

The CR9380-NPN is a split-core current switch designed for bidirectional AC current monitoring. It features an NPN transistor output suitable for direct connection to PLCs or relay inputs. The device operates with a maximum switching voltage of 30 VDC and supports a continuous current rating of 100A. It utilizes a single-pass-through design with a 0.40-inch inner diameter, allowing installation without breaking the conductor. The unit provides normally open solid-state output functionality.

Current Sensors Feature Summary

• Split-core design enables non-invasive installation on existing conductors
• NPN transistor output configuration compatible with standard logic inputs
• Bidirectional sensing capability for alternating current applications
• Solid-state construction ensures reliable switching performance

Current Sensors Applications

• Direct interface with programmable logic controllers for current monitoring
• Connection to electromechanical relays for load protection circuits
• Industrial machinery status indication based on current thresholds
• Power distribution system monitoring and fault detection

Current Sensors Procurement Notes

Verify that the specific order matches the NPN output variant, as other configurations exist within the series. Confirm the application current exceeds the minimum threshold required to drive the output fully on. Ensure proper external circuitry, such as clamp diodes or snubbers, is provided if connecting to inductive loads like relays. Check that the conductor size fits within the 0.40-inch split core aperture.

Current Sensors Selection Notes

Select this model when a non-invasive solution is required for AC current monitoring up to 100A. The NPN output is appropriate for sinking current into digital inputs. Consider the PNP variant if sourcing current is necessary. Verify that the operating environment does not require a mounting base, as this version is designed for free-standing use. Ensure the control voltage aligns with the 30 VDC maximum switching limit.

Current Sensors Part Context

This component belongs to the CR9380 series of low-cost, self-powered current switches manufactured by CR Magnetics. The series offers fixed trip points and full isolation between the primary conductor and the output circuit. Variants include NPN, PNP, and SCR outputs, with options for mounting bases or split-core designs. The series is engineered for simple integration into industrial control systems.

Current Sensors Replacement Considerations

Cross-reference with CR9380-PNP-M for sourcing output requirements or CR9380-NPN-M if a mounting base is preferred. Ensure substitute models maintain the 100A rating and 0.40-inch ID if physical constraints apply. Verify output polarity compatibility with the existing control logic before substitution.