HAS50-S High-Accuracy Open-Loop Hall Effect Current Transducer – Swiss LEM 

Quality, Inject Precision “Sensing Power” into Your Equipment

HAS50-S Brand Quality: Trusted Swiss Excellence from LEM

In the field of current transducers, LEM is a globally recognized leader with over 50 years of expertise in electrical measurement. As a pioneer in the electrical measurement sensor market, LEM delivers innovative technology and high-quality solutions to customers worldwide. Its products are widely used in drives & welding, renewable energy & power supplies, rail & transportation, EV, smart grid, and Industry 4.0 applications. LEM holds ISO 9001, ISO 14000, and TS 16949 certifications, and its products comply with RoHS requirements, serving major electric vehicle manufacturers and industrial customers globally. Choosing LEM means choosing guaranteed quality and technical leadership.

HAS50-S Product Overview: Small Size, Big Performance

The HAS50-S is a flagship model in LEM’s HAS series of open-loop Hall effect current transducers. It uses the open-loop Hall principle, allowing high-accuracy measurement of DC, AC, pulsed, and irregular waveforms while providing full electrical isolation between the primary (high-power) and secondary (electronic) circuits.

About the size of a playing card, this transducer has a rated current of 50A but can measure up to ±150A. With its tiny size and low power consumption, it provides powerful real-time current detection for your equipment. Whether you design variable frequency drives, battery management systems (BMS), UPS, or switch-mode power supplies, the HAS50-S will be a trustworthy “current sensing neuron” in your circuit.

HAS50-S Core Advantages: Five Key Features for Industrial Success

High Accuracy & High Linearity – “Flawless” Data

Accuracy is the lifeblood of a current transducer. The HAS50-S delivers ±1% accuracy and ±1% linearity over the full range, with excellent static accuracy at +25°C, accurately reproducing real current waveforms and providing the most reliable data for your control algorithms. In demanding fields like renewable energy and industrial automation, precisely capturing each current variation means more reliable product performance and lower failure rates.

Wide Measuring Range & Fast Response – Capture Everything from Weak Signals to Surge Currents

Rated 50A but measuring up to ±150A, the 3x overload margin handles large current surges without changing sensors. A 3µs response time captures transient currents from nanoseconds to milliseconds – motor starting surges or power electronic switching spikes – giving you valuable time for overcurrent protection and fault diagnosis.

Wide Bandwidth & Electrical Isolation – Safe, Reliable, and Easy to Pass Safety Certifications

DC~50kHz bandwidth covers most industrial drive and power management signal frequencies. With 3.6kVrms isolation voltage and a polycarbonate PBT housing rated UL94-V0, the HAS50-S provides safe isolation between primary and secondary circuits, helping you pass relevant safety certifications with ease.

Wide-Temperature Stable Operation – A Reliable Guardian in Harsh Environments

Operating temperature from -10°C to +80°C, with an extended SP50 model for -40°C to +85°C extreme conditions. Excellent temperature compensation maintains outstanding measurement stability in harsh industrial environments. As measured at a northern wind farm, the drift value after three years of continuous operation was <0.1%/year, doubling the maintenance interval compared to conventional transducers.

Low Power Consumption & Easy Mounting – Save Space and Energy

Typical power consumption is only ±15mA, reducing system energy and PCB space. Mounting is extremely simple – single-hole fixing (4.5mm diameter, recommended torque 0.75Nm ±10%) allows fast deployment. Various package and mounting options are available to suit different product structures and production processes.

HAS50-S Technical Specifications

HAS50-S Applications: Proven Performance in Six Key Areas

With its outstanding comprehensive performance, the HAS50-S has been widely validated in the following fields:

Industrial Automation & Motor Drives
Real-time current monitoring for AC variable frequency drives and servo motors, helping optimize energy management and improve motor control response speed. In tests on a Shenzhen servo motor production line, replacing sensors with the HAS series improved system response speed by 15%.

EV & Battery Management Systems (BMS)
Real-time monitoring of battery charge/discharge current allows the system to accurately calculate state of charge (SoC) and adjust charging strategies, effectively extending battery life while providing high-precision overcurrent protection for enhanced vehicle safety. A leading EV manufacturer has fully adopted the HAS50-S in its latest BMS design.

Renewable Energy & PV Inverters
Output current monitoring for PV inverters and MPPT control, helping improve system conversion efficiency. At a 50MW solar farm in Jiangsu, replacing sensors with HAS50-S/SP50 improved overall system conversion efficiency by 2.1 percentage points.

UPS & Switch Mode Power Supplies (SMPS)
Real-time input/output current monitoring with DSP control achieves nanosecond-level response, reducing charging station standby power loss to under 5W.

Industrial Power Supplies & Welding Equipment
Current feedback and control for welding power supplies, providing millisecond-level precise adjustment to ensure consistent weld quality.

Smart Grid & Wind Farms
In an offshore wind farm intelligent O&M system, a HAS series transducer array provides millisecond-level monitoring of generator winding currents. After six months, fault warning accuracy reached 92% and O&M costs dropped by 37%.

Why Choose Us HAS50-S ?

We are not only an authorized distributor of genuine LEM components, but also your technical partner.

100% Genuine & Original – All products are sourced directly from LEM or its authorized channels, ensuring every HAS50-S is brand new and genuine – no refurbished or counterfeit goods.

In-Stock & Fast Delivery – Large quantities in stock, fast dispatch after ordering, shortening your procurement cycle.

Professional Technical Support – An experienced engineering team provides full support from selection advice to on-site debugging, helping you quickly integrate the product.

Competitive Pricing & One-Stop BOM Service – Volume discounts available, and we offer one-stop BOM service to save you time and cost.

Complete After-Sales Guarantee – LEM’s official 5-year warranty, unconditional return for quality issues – buy with confidence.