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LEM HO Multi-Range Current Transducers

LEM HO Multi-Range Current Transducers comprise the HO-NP, HO-NSM, HO-P, and HO-S Series. The LEM HO transducers are designed for precise DC, AC, and pulse current measurement while maintaining galvanic isolation between the primary and secondary circuits. With a wide current measurement range from 6ARMS to 250ARMS, these sensors cater to diverse applications. Most HO sensors are designed for PCB mounting, either through-hole or surface mount, except for the HO-S series. The HO-S features a 15x8mm aperture for panel mounting. Key performance benefits include short response times, low offset and gain drift, and high accuracy, ensuring dependable current measurements across various environments.

The LEM HO components include specialized models with advanced features. The HO-NP series supports nominal current measurements from 10A to 150A with four primary pin configurations per model. Meanwhile, the HO-NSM and HO-P devices introduce intelligent, programmable functionality, allowing users to customize parameters such as measurement ranges (8ARMS, 15ARMS, 25ARMS), overcurrent detection thresholds, response times, and up to four internal reference voltages. Operating on open-loop Hall effect sensor technology, the HO components provide a highly adaptable and reliable solution for industrial applications requiring precise and flexible current measurement capabilities.

Features

  • Small size and space-saving
  • Only one design for the primary current range
  • High immunity to external interference
  • 8mm creepage/clearance
  • High insulation capability
  • Fast response
  • Hall effect measuring principle
  • Galvanic separation between the primary and secondary circuits
  • 4300V insulated test voltage
  • Low power consumption
  • Single +5V power supply
  • Fixed offset and sensitivity
  • Overcurrent detection from 2.63 x Ipn to 2.93 x Ipn (peak value) - depending on parts
  • Memory check
  • Voltage output
  • 5-year warranty
  • RoHS compliant

Applications

  • AC variable speed and servo motor drives
  • Static converters for DC motor drives
  • Battery-supplied applications
  • Uninterruptible Power Supplies (UPS)
  • Switched Mode Power Supplies (SMPS)
  • Power supplies for welding applications
  • Combiner boxes
  • Solar inverter on the DC side of the inverter (MPPT)
  • Renewable energy (solar and wind)

Datasheets

Inilathala: 2025-10-03 | Na-update: 2025-10-22