CTSR 3-TP/SP19

Current Sensors Overview

The LEM CTSR 3-TP/SP19 is a board mount residual current sensor designed for precise measurement of alternating and pulsating currents. It operates with a rated current of 3 A and provides galvanic isolation between the primary circuit and the secondary control circuit. The device features a digital output type and utilizes an open-loop sensing technology to ensure accurate signal transmission. It supports a supply voltage range from 5 V to 5 V, indicating a fixed single-voltage operation requirement. The unit is engineered for reliable performance within a temperature range of -40°C to +85°C, suitable for various industrial and commercial electronic applications requiring high safety standards.

Current Sensors Feature Summary

• Provides galvanic separation between the primary high-current circuit and the secondary low-voltage control circuit for enhanced safety.
• Delivers digital output signals for direct integration into microcontroller-based monitoring systems.
• Utilizes open-loop technology to measure AC and pulsating residual currents with high precision.
• Designed for board mounting to facilitate compact integration into electronic assemblies.

Current Sensors Applications

• Residual current monitoring in renewable energy systems
• Safety detection in industrial power distribution units
• Current leakage monitoring in electric vehicle charging infrastructure
• Protection circuits in medical electrical equipment

Current Sensors Procurement Notes

Verify the specific suffix SP19 against the official LEM datasheet to confirm pinout configuration and mechanical dimensions. Ensure the supply voltage matches the required 5 V specification exactly, as deviation may affect digital output integrity. Check RoHS compliance status through the manufacturer's documentation before finalizing procurement orders for regulated markets.

Current Sensors Selection Notes

Select this component when measuring small residual currents up to 3 A with digital interface requirements. Consider the open-loop architecture for cost-sensitive designs where extreme linearity is not critical. Evaluate the board mount form factor against available PCB space constraints. Compare thermal performance specifications against the expected ambient operating conditions to ensure long-term reliability.

Current Sensors Part Context

The CTSR series represents LEM's portfolio of residual current sensors focused on safety-critical applications. This specific model belongs to the TP variant family, characterized by its specific terminal configuration and packaging style. It complements other models in the series that offer different current ratings and output types, providing engineers with scalable solutions for comprehensive current monitoring needs across diverse electronic platforms.

Current Sensors Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Consult LEM technical support or authorized distributors for cross-reference information regarding equivalent components with compatible current ratings and interface specifications.

Current Sensors FAQ

What type of current does the CTSR 3-TP/SP19 measure?

It measures alternating (AC) and pulsating residual currents.

Is there galvanic isolation in this sensor?

Yes, it provides galvanic separation between the primary circuit and the secondary circuit.