LEM LT505-S/SP8 Closed-Loop Hall-Effect Current Sensor: The Ultimate Choice for High-Precision & Ultra-High Current Measurement

LT505-S/SP8 High-Precision Closed-Loop Hall Effect – Safeguarding Your Power System

The LT505-S/SP8 is a high-performance closed-loop Hall-effect current sensor crafted by LEM, a global benchmark in electrical measurement. Leveraging LEM’s proprietary closed-loop Hall-effect compensation technology, this sensor accurately measures DC, AC, pulsed, and any irregular waveform current. For demanding applications such as industrial automation, railway traction, power supplies, and renewable energy generation that require stringent power quality, the LT505-S/SP8 not only delivers outstanding 0.5% accuracy and a bandwidth up to 150 kHz, but also ensures galvanic isolation between the primary high-voltage circuit and the secondary low-voltage circuit – greatly enhancing the absolute safety of your system.

LT505-S/SP8 Ultra-Fast Response & High Overload Capability – Capture Every Transient Signal

In many precision applications, the ability to capture fast-changing transient fault currents is critical. The LT505-S/SP8 features an ultra-fast response time of 1 microsecond (1 µs) and a maximum measurement range up to 1400 A, easily handling load fluctuations and surge currents beyond its 720 A rated primary current. With ±0.1% linearity and extremely low temperature drift, this sensor provides smooth, stable measurement data to your control unit even under extreme operating conditions.

LT505-S/SP8 Compact Design & Flexible Mounting – Ruggedized for Industrial & Railway Environments

Featuring a 40.5 x 40.5 mm through-hole design and supporting panel mounting, the LT505-S/SP8 is compact and allows easy routing of busbars or cables while integrating seamlessly into limited-space electrical cabinets. Designed for harsh environments with high vibration (including railway applications), its plastic case complies with UL94-V0 flammability rating and offers excellent insulation and withstand voltage, meeting stringent electrical safety standards worldwide.

LT505-S/SP8 Core Advantages – Exceptional Quality

The LT505-S/SP8 stands out as the best choice for engineers seeking a replacement for similar imported products, thanks to these five core advantages:

High Rated Value: 720 A RMS rated current, measuring up to 1400 A.

Bipolar Supply Voltage: Wide range of ±15 V to ±24 V output for strong adaptability.

144 mA Current Output Signal: Excellent noise immunity for long-distance transmission, ideal for direct connection to PLCs or industrial controllers.

Wide Operating Temperature: Covers -10°C to +85°C, unaffected by harsh ambient conditions.

Environmental Robustness: High immunity to electromagnetic interference, fully compliant with railway and automation EMC standards.

LT505-S/SP8 Full-Scene Application Coverage – From Factory Automation to New Energy

Whether used in demanding AC variable frequency drives and servo motor drives, or in safety-critical uninterruptible power supplies (UPS) and switch-mode power supplies (SMPS), the LT505-S/SP8 plays a vital monitoring role. Particularly in railway traction systems, EV power control, high-performance welders, and solar/wind power inverters (high-power conversion equipment), the LT505-S/SP8’s excellent response speed and wide frequency band provide accurate feedback on energy regeneration. This enables smart grid management and high-efficiency energy-saving automation control objectives.

LT505-S/SP8 Detailed Specifications

Brand: LEM

Model: LT505-S/SP8

Technology: Closed-Loop Hall Effect

Rated Input Current: 720 A rms

Measuring Range: 0 to ±1400 A

Secondary Output: 144 mA

Accuracy: ±0.5% (at room temperature)

Linearity: ±0.1%

Frequency Bandwidth: DC ~ 150 kHz

Supply Voltage: ±12 V to ±15 V (also adaptable to ±15 V to ±24 V)

Response Time: < 1 µs

Operating Temperature: -10°C to +85°C

Storage Temperature: -40°C to +70°C

Mounting Type: Panel mount

Aperture: 40.5 x 40.5 mm

Certifications: UL94-V0; compliant with ISO 9001 quality management system

Origin: Switzerland or European Union