LEM HAS200-S – High Accuracy Open-Loop Hall-Effect Current Sensor

HAS200-S Precise Current Sensing for Demanding Industrial Applications

In industrial automation and energy management, the accuracy of current measurement directly impacts system stability and safety. The LEM HAS200-S Hall-effect open-loop current sensor builds on more than 40 years of sensor development from LEM (Switzerland), delivering high-precision, highly reliable current measurement solutions for your power electronics systems.

HAS200-S Key Advantages

±1% High Accuracy – Total measurement error below ±1%, linearity error below ±1%. Delivers stable and reliable current feedback, significantly reducing system risks caused by current sensing errors.

Wide Measurement Range – Rated current 200A, maximum measurement range up to ±600A (3× rated overload capability). Handles transient high current surges with ease, providing ample dynamic margin for your system.

3µs UltraFast Response Time – Industry-leading dynamic response, capturing current transients within microseconds. Whether it's motor inrush current or fault overcurrent, the HAS200-S responds instantly to buy critical time for protection circuits.

Wide Temperature Range – Operating temperature from -40°C to +105°C with a temperature drift coefficient better than ±0.1%/K. From freezing outdoor substations to hot industrial workshops, the HAS200-S maintains stable performance.

High Electrical Isolation – Fully galvanic isolation between primary and secondary circuits. Insulation resistance >1000 MΩ, test voltage 3.6 kVrms, guaranteeing absolute safety between high-voltage primary side and low-voltage control circuits.

Low Power Consumption – Power supply current only ±15mA, reducing overall system energy use, minimizing self-heating, and extending the life of the sensor and surrounding components.

Compact, Easy to Mount – Weight approx. 60g. Small modular design supports panel mounting, saving valuable internal space. Housing made of UL 94-V0 rated PBT polycarbonate, flame-retardant and safe.

HAS200-S Applications

The HAS200-S is widely used in:

AC variable frequency drives & servo motor drives – real-time current monitoring for improved control accuracy and energy management

DC motor drive static converters – precise current feedback for speed control

Uninterruptible power supplies (UPS) – monitoring battery charge/discharge currents and inverter output to protect critical loads

Switch mode power supplies (SMPS) & welding power supplies – accurate current feedback to boost conversion efficiency

Batterypowered systems & EV chargers – real-time charging current monitoring for safe, stable EV charging – charging efficiency improved up to 18%

Photovoltaic inverters & wind turbine converters – reduces system response time by nearly 30% and improves overall efficiency by about 1.5%

Industrial test & measurement equipment – ±4V instantaneous voltage output with strong compatibility for easy data acquisition and analysis

HAS200-S Technical Specifications

Why Choose the HAS200-S?

LEM is a globally recognized leader in industrial current sensing. The HAS200-S inherits LEM's proven quality:

Mature & reliable – The HAS series is a classic, market-proven product line with massive installed base worldwide.

Excellent compatibility – ±4V analog voltage output works seamlessly with most control system interfaces.

High noise immunity – Open-loop Hall technology combined with careful electromagnetic shielding ensures stable operation in harsh EMI environments.

Great value – Among same-class products, the HAS200-S offers the most competitive price for its performance level.

Ready availability – As a mainstream LEM model, widely stocked by global distributors with reliable lead times.