LA 35-NP/SP1

Current Sensors Overview

The LA 35-NP/SP1 is a closed-loop Hall effect current transducer designed for the electronic measurement of DC, AC, pulsed, and mixed currents. It provides galvanic isolation between the primary high-power circuit and the secondary low-voltage circuit. The device features a nominal primary current rating of 35 A with a secondary output of 35 mA. It supports multi-range operation with nominal primary currents of 7 A, 8 A, 11 A, 17 A, and 35 A RMS. The unit is engineered for printed circuit board (PCB) mounting, integrating both primary and secondary connections directly onto the board.

Current Sensors Feature Summary

• Closed-loop Hall effect technology ensures high precision and linearity across varying current types.
• Galvanic isolation separates the primary high-power circuit from the secondary control circuitry.
• Multi-range capability allows selection among five distinct nominal primary current ratings.
• Designed for direct PCB mounting to simplify integration into power electronics systems.

Current Sensors Applications

• Electronic measurement of DC and AC currents in industrial drives
• Monitoring pulsed and mixed currents in power supply units
• Current sensing in inverter and converter topologies
• Battery management system monitoring

Current Sensors Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the exact pin configuration and mechanical dimensions. Ensure that the selected variant matches the required nominal primary current range for the application. Cross-reference the datasheet revision date to confirm compatibility with current design standards. Confirm that the PCB footprint aligns with the specified mounting requirements before finalizing procurement orders.

Current Sensors Selection Notes

Select this component when precise measurement of mixed or pulsed currents is required alongside galvanic isolation. The closed-loop architecture offers superior dynamic response compared to open-loop alternatives. Consider the multi-range flexibility if the design needs to accommodate different current levels within the same form factor. Verify that the PCB mounting style fits the available space constraints on the target circuit board layout.

Current Sensors Part Context

This part belongs to LEM's LA series of current transducers, which utilize closed-loop Hall effect technology. The 'NP' designation indicates a single primary turn configuration, while 'SP1' denotes the specific secondary pinout and packaging style. This series is widely used in applications requiring accurate current feedback for control loops in power electronics.

Current Sensors Replacement Considerations

Consult the official LEM replacement guide for verified substitute part numbers. Ensure any alternative maintains the same closed-loop topology and galvanic isolation voltage ratings. Verify that the replacement part supports the required multi-range functionality and PCB mounting style without requiring redesign of the host circuit board.

Current Sensors FAQ

What types of currents can the LA 35-NP/SP1 measure?

It measures DC, AC, pulsed, and mixed currents with galvanic isolation between the primary and secondary circuits.

How many nominal primary current ranges are supported?

The device supports five nominal primary current ranges: 7 A, 8 A, 11 A, 17 A, and 35 A RMS.

What is the mounting method for this transducer?

The transducer is designed for direct printed circuit board (PCB) mounting, integrating both primary and secondary connections.