HX20-P High-Precision Hall-Effect Current Sensor

HX20-P Overview

The HX20-P, manufactured by the globally renowned sensor brand LEM, is a high-performance open-loop Hall-effect current sensor designed for high-accuracy measurement of AC, DC, and pulsed currents. With a rated current of 20 A and a maximum measuring range up to 60 A, it is widely used in industrial automation, power monitoring, renewable energy, and drive control applications.

HX20-P Key Technical Advantages

The HX20-P uses a mature open-loop Hall-effect technology. The Hall element directly detects the magnetic field generated by the primary current, providing galvanic isolation between the primary (high-power) circuit and the secondary (electronic) circuit. This ensures measurement safety while avoiding the insertion loss typical of conventional shunt resistors.

Compared with other current measurement methods, the HX20-P offers the following significant benefits:

Low insertion loss – Non-contact measurement principle consumes almost no energy from the circuit under test, so system efficiency is unaffected.

High immunity to interference – Built-in high electromagnetic immunity ensures stable output even in harsh industrial environments.

Compact footprint – Occupies only about 2.93 cm² of PCB mounting area, greatly saving board space.

Easy for automated assembly – Through-hole design is compatible with automatic insertion equipment, helping to reduce production costs.

HX20-P Technical Specifications and Performance

HX20-P Wide Range of Applications

The versatility of the HX20-P makes it suitable for many industrial current measurement tasks:

Industrial drives – Monitor operating current in AC variable-frequency drives, servo motor drives, and static converters to keep equipment within safe limits, supporting fault diagnostics and predictive maintenance.

Switched-mode power supplies and UPS – Use in SMPS and uninterruptible power supplies (UPS) for current monitoring, helping to detect overload or short-circuit conditions and providing key data for protection circuits.

Renewable energy – In solar inverters and wind power systems, monitor generation efficiency and load balancing to ensure stable, reliable system operation.

Battery-powered equipment – Measure current in battery management systems to monitor charge/discharge status in real time and extend battery life.

Power monitoring and energy management – Collect real-time current data from electrical equipment to support energy consumption analysis and optimisation, helping enterprises reduce operating costs and improve energy efficiency.

Welding equipment and test instruments – Integrate into welding power sources and laboratory instruments, providing accurate current signal output for highreliability measurement needs.

Why Choose the HX20-P?

Trusted global brand – LEM is a leading international brand in current sensors, proven by years of use in industrial markets worldwide.

High-performance precision – ±1% accuracy and linearity combined with a 50 kHz bandwidth cover most industrial current monitoring requirements.

Electrical safety assured – 3000 V isolation voltage and UL94-V0 flame-retardant housing meet strict electrical safety standards.

Standard package for easy integration – Through-hole PCB mounting allows quick replacement and integration into existing product designs.

Wide operating temperature range – Designed for –25 °C to +85 °C, suitable for industrial and outdoor environments.

Excellent cost-performance ratio – LEM offers 17 different models covering 3 A to 50 A needs, all with a consistent design style to reduce selection and inventory complexity.