LF 1010-S/SPA5 , LF1010-S/SPA5

Product Model: LF1010-S/SPA5 (LEM Closed-Loop Hall Effect Current Sensor)

LF1010-S/SPA5 Master Every Ampere with Precision | High-Accuracy Current Measurement Solution up to 1000A

In power electronics systems, the accuracy and response speed of current monitoring directly determine system stability and reliability. The LF1010-S/SPA5, a high-performance closed-loop Hall effect current sensor from LEM – the global leader in current sensing – is designed for demanding industrial environments. It delivers fluxgate-like accuracy at a Hall-effect price, providing reliable current measurement for drive control, power supplies, renewable energy, welding equipment, and more.

LF1010-S/SPA5 Key Advantages

Fluxgate-level accuracy at Hall-effect cost

The LF1010-S/SPA5 adopts LEM's next-generation closed-loop Hall effect architecture based on ASIC technology. Over the full operating temperature range, total accuracy reaches ±0.4% of Ipn, and maximum offset drift is as low as 0.1% of Ipn. It directly rivals fluxgate sensors in performance, without their high cost and noise issues.

2700A wide dynamic range – one sensor, multiple uses

Rated for 1000A RMS and capable of measuring up to 2720A, it combines high-precision measurement with a large dynamic margin, easily handling conditions from rated load to fault current surges.

Sub-microsecond response for real-time control

Response time < 500 ns captures fast current transients and feeds them back to the control system, making motor drives, inverters, and other equipment operate more smoothly.

Wide operating temperature for harsh environments

Operating temperature range -40°C to +85°C. Whether in extreme cold or high heat, the sensor maintains stable measurement accuracy, ensuring 24/7 system reliability.

Compact design, flexible mounting

Aperture sizes of 40mm × 13mm or 38mm diameter are available for the primary conductor. Multiple panel mounting options allow easy integration into various cabinets and equipment.

LF1010-S/SPA5 Key Technical Specifications

LF1010-S/SPA5 Typical Applications

Drives & Automation: Servo drives, adjustable speed drives, robotics, elevator & escalator drives. The sensor monitors motor current in real time, providing accurate feedback for closed-loop control, resulting in smoother operation and higher efficiency.

Power Management: UPS, SMPS, telecom power supplies, battery charger management. Achieves precise output current regulation and battery charge/discharge monitoring.

Renewable Energy: Solar inverters, wind power converters, fuel cell systems, energy storage systems. Ensures stable operation of new energy equipment under varying grid conditions.

Welding & Industrial Equipment: Welding power sources, industrial machinery (printing, textile, plastic machinery). Accurately captures current changes during welding to optimize weld quality.

Rail & Infrastructure: Wayside traction systems, signaling systems, electric door controls. Online monitoring of critical equipment to detect anomalies early and reduce maintenance costs.

Why Choose the LF1010-S/SPA5?

LEM Quality Guarantee: From LEM, with over 40 years of expertise in current sensing. Trusted worldwide across industrial sectors.

No performance compromise: Closed-loop Hall effect combined with ASIC delivers accuracy and stability approaching that of fluxgate sensors.

Excellent immunity to stray fields: 1.5 times better than previous generations, ensuring stable operation in electrically noisy environments.

Fast recovery after overload: No start-up delay as with fluxgate technology – ready for action immediately after an overload.

In stock, fast delivery: Available from authorized distributors. Quick ordering via DigiKey and other platforms with typical lead time of about 10 weeks.