HO 120-NPW-0000 , HO120-NPW-0000

LEM HO 120-NPW-0000 HO-NPW Series Open Loop Hall Effect Current Transducer

LEM HO 120-NPW-0000 Product Overview

The HO 120-NPW-0000 is an open-loop Hall effect current transducer from LEM's HO-NPW Series, designed for the electronic measurement of DC, AC, and pulsed currents with galvanic isolation between the primary and secondary circuits. This through-hole PCB-mount transducer features an integrated multi-range primary conductor with 4 pins, allowing the nominal current to be set to 30 A, 60 A, or 120 A depending on the PCB connection configuration. The device outputs a 1-bit digital Pulse Density Modulation (PDM) bitstream via an integrated sigma-delta modulator, enabling direct interface with digital control systems. The compact design measures 20 (W) x 41 (L) x 27 (H) mm with 8 mm creepage and clearance distances and CTI 600.

Rated for 120 A nominal with a measuring range of ±300 A (2.5 × IPN), the device provides up to 12-bit resolution and a bandwidth of 20 kHz with a tack frequency of 10 MHz. Accuracy is ±1.25% and linearity is ±0.5%. Supply voltage range is 4.5 V to 5.5 V with a maximum current consumption of 31 mA. Operating temperature ranges from -40°C to +105°C. The device is bidirectional and carries a 5-year LEM warranty.

LEM HO 120-NPW-0000 Key Specifications

LEM HO 120-NPW-0000 Key Advantages

The HO 120-NPW-0000 employs open-loop Hall effect technology, delivering ±1.25% accuracy and ±0.5% linearity while providing galvanic isolation between primary and secondary circuits. The multi-range capability through primary layout configuration allows a single transducer to cover 30 A, 60 A, or 120 A nominal currents, simplifying inventory management. The digital PDM bitstream output with integrated sigma-delta modulator provides up to 12-bit resolution for direct interface with digital control systems, eliminating the need for external ADC conversion.

A key feature is the dedicated overcurrent detection (OCD) output on a separate open-drain pin, with a detection threshold set at 2.97 × IPN (peak value), enabling fast system-level protection without additional circuitry. The single +5 V supply simplifies integration into low-voltage digital systems. The through-hole PCB design offers low power consumption (31 mA maximum), high immunity to external interference, and no insertion losses. The device is factory calibrated and features 8 mm creepage/clearance with reinforced insulation.

LEM HO 120-NPW-0000 Typical Applications

AC variable speed drives 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 box and MPPT systems
Renewable energy systems

Why Choose the LEM HO 120-NPW-0000?

The HO 120-NPW-0000 combines a 120 A rated current and ±300 A measuring range with digital PDM bitstream output in a compact through-hole PCB-mount package with a single +5 V supply. Manufactured by LEM, it delivers stable, accurate, and safe current measurement for industrial applications requiring digital interfaces. The open-loop Hall effect design offers a cost-effective solution with multi-range flexibility, overcurrent detection, excellent interference immunity, and small footprint. The wide -40°C to +105°C operating temperature range and 8 mm creepage/clearance with reinforced insulation ensure reliable performance in demanding environments. The product is Active with a standard lead time of 14 to 76 weeks and carries a 5-year LEM warranty.