LF2005-S/SP33，LF 2005-S/SP33

‌LF2005-S/SP33 Product Description — The Benchmark of Industrial Closed-Loop Current Sensors

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LF2005-S/SP33 ‌Key Features‌
The LF2005-S/SP33 is a high-performance closed-loop Hall current sensor developed by LEM, the global leader in current sensing, engineered for demanding industrial environments. Its core strengths lie in ‌high accuracy, rapid response, robust isolation, and full-bandwidth adaptability‌. Leveraging closed-loop compensation technology, it effectively eliminates core nonlinearity and temperature drift, ensuring stable output even under severe electromagnetic interference. It accurately measures DC, AC, and pulsed currents with a ‌total accuracy of ±0.3%‌ and a response time ‌under 1 μs‌, meeting the demands of high-speed dynamic control. The ‌electrical isolation design‌ provides complete galvanic separation between primary and secondary circuits, ensuring system safety and compliance with EN 50178 industrial safety standards. Its optimized housing supports both vertical and horizontal mounting, compatible with industrial connectors such as Molex and JST, enabling flexible integration into diverse control cabinet layouts.

LF2005-S/SP33 ‌Technical Specifications‌

‌Rated Current‌: 2000 A (RMS)

‌Measurement Range‌: 0 to ±3500 A (peak)

‌Secondary Output‌: 400 mA (RMS)

‌Supply Voltage‌: ±15 V to ±24 V (dual power supply)

‌Current Consumption‌: 33 mA (@ ±24 V, including output)

‌Accuracy‌: ±0.3% (@ 25°C, rated current)

‌Linearity Error‌: < 0.1%

‌Zero Drift‌: ±0.2 mA (@ 25°C)

‌Temperature Drift‌: ±0.2 mA (–40°C to +70°C)

‌Response Time‌: < 1 μs (90% output rise time)

‌Bandwidth‌: DC to 100 kHz (–3 dB)

‌Operating Temperature‌: –40°C to +70°C

‌Storage Temperature‌: –40°C to +85°C

‌Insulation Voltage‌: ≥ 5 kV (AC, 1 minute)

‌Protection Rating‌: Complies with UL 94-V0 plastic housing standard

‌Mounting‌: Disc mounting with bolt fixation

LF2005-S/SP33 ‌Applications‌
The LF2005-S/SP33 is widely deployed in industrial applications demanding high precision and system safety in current monitoring:

‌Industrial VFDs and Servo Drives‌: Real-time motor current monitoring for precise speed control and overload protection

‌Renewable Energy Inverters‌: Used in photovoltaic and wind power systems for closed-loop feedback on DC and AC sides, enhancing energy conversion efficiency

‌Railway Traction Control‌: Integrated into electric locomotive and metro traction converters to ensure stable operation under high-current conditions

‌Electric Vehicle Drive Systems‌: Employed in battery management systems (BMS) and motor controllers to enable high-dynamic current closed-loop control

‌Uninterruptible Power Supplies (UPS) and Welding Equipment‌: Delivers reliable current sampling for stable output waveforms and consistent weld quality

‌Why Choose LF2005-S/SP33?‌
Selecting the LF2005-S/SP33 is not merely choosing a sensor—it is adopting a ‌trusted system assurance solution‌. Its ‌closed-loop Hall architecture‌ significantly reduces temperature drift and nonlinearity compared to open-loop alternatives, eliminating the need for frequent recalibration over long-term operation. The ‌ultra-fast response time of <1 μs‌ enables detection of transient current spikes, preventing false triggering or equipment damage. The ‌wide supply voltage range of ±24 V‌ ensures seamless compatibility with mainstream industrial power systems, offering flexible deployment. Backed by a ‌5-year warranty‌, LEM demonstrates unmatched confidence in product reliability—far exceeding industry norms. For engineering teams prioritizing continuous operation, reduced maintenance, and enhanced system safety, the LF2005-S/SP33 represents the ‌optimal solution‌ for high-precision, high-stability current monitoring.