LT1005-S/SP8，LT 1005-S/SP8

‌LT1005-S/SP8 Product Details: The Pillar of Industrial Current Sensing

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LT1005-S/SP8 ‌Product Description‌
The LT1005-S/SP8 is a closed-loop Hall current sensor from LEM’s LT1005-S series, engineered for high-reliability industrial applications. With a rated current of 1000 A RMS, it delivers precise measurement of DC, AC, and high-frequency pulsed currents. Leveraging zero-flux compensation technology, it achieves up to 6 kV RMS electrical isolation between the primary circuit and secondary electronics, outputting a proportional 200 mA current signal that maintains zero drift and high linearity even under high-noise and EMI-intensive conditions. As the industrial standard variant in the S-series, the SP8 ensures seamless interchangeability across production batches and lines through stringent manufacturing consistency controls—making it the ideal choice for systems requiring “design once, operate forever” over decade-long lifecycles.

LT1005-S/SP8 ‌Key Features‌

‌Closed-loop Zero-Flux Architecture‌: Utilizing Hall-effect flux balancing, it delivers ±0.4% measurement accuracy with complete elimination of temperature drift and zero-point offset, ensuring stable output across the full operating range of -10°C to +85°C.

‌Current Output, Unmatched Noise Immunity‌: The 200 mA full-scale proportional current output inherently rejects common-mode noise, enabling reliable signal transmission over distances exceeding 100 meters without additional conditioning—perfect for inverter cabinets, traction systems, and other high-EMC environments.

‌Non-Intrusive Through-Hole Installation‌: A 40.5 mm × 40.5 mm square aperture allows installation without breaking the primary circuit, eliminating thermal stress and system downtime while significantly improving maintenance efficiency and operational continuity.

‌Wide-Range Dual-Supply Compatibility‌: Supports ±15 V to ±24 V bipolar power supplies, simplifying integration across diverse industrial power architectures and reducing design complexity.

‌Industrial-Grade Environmental Resilience‌: Encased in UL94V-0 flame-retardant material with IP54 protection, it withstands vibration, dust, and moisture, ensuring long-term reliability in harsh environments laden with particulates, humidity, and electromagnetic interference.

‌Ultra-Fast Dynamic Response‌: With a response time of ≤1 µs and bandwidth up to 150 kHz, it accurately captures current transients, switching spikes, and harmonic components—ideal for IGBT drives, welding power supplies, and battery charge/discharge systems.

LT1005-S/SP8 ‌Technical Specifications‌

‌Rated Current‌: 1000 A RMS

‌Measurement Range‌: 0 to ±2000 A (instantaneous)

‌Supply Voltage‌: ±15 V to ±24 V (bipolar)

‌Output Signal‌: 200 mA full-scale proportional current

‌Accuracy‌: ±0.4%

‌Response Time‌: ≤1 µs

‌Operating Temperature‌: -10°C to +85°C

‌Isolation Voltage‌: 6 kV RMS (50 Hz, 1 min), compliant with EN 50178 safety isolation standard

‌Mounting‌: Panel mount, through-hole square aperture 40.5 mm × 40.5 mm, M12 bolt fixation

‌Certifications‌: EN 50155 (Railway Applications), EN 50178 (Industrial Electrical Equipment), RoHS, REACH

LT1005-S/SP8 ‌Applications‌
The LT1005-S/SP8 serves as the core sensing element for current control and safety protection in high-power industrial systems, widely deployed in:

Large industrial inverters and servo drives, enabling precise torque control and overload protection

Solar and energy storage inverters, supporting MPPT feedback and grid-current regulation

Electric vehicle DC fast chargers, ensuring current safety and efficiency optimization during high-power charging

Railway traction converters and locomotive power units, for energy recovery, braking control, and fault diagnostics

High-frequency induction welding power supplies, guaranteeing arc stability and weld quality consistency

Uninterruptible power supplies (UPS) and high-power switch-mode power supplies, enabling real-time input/output current monitoring and protection interlocking

‌Why Choose LT1005-S/SP8 This Model‌
The LT1005-S/SP8 does not chase peak specifications—it embodies ‌engineering certainty‌. In industrial systems with lifecycles spanning a decade or more, replacing a sensor means re-certification, re-tuning, or even full system shutdown—costly, risky, and disruptive. The SP8 variant matches SP31 and SP39 in electrical performance but surpasses them in manufacturing consistency, enabling zero-risk substitution across batches and lines. It requires no software calibration, resists power fluctuations, and remains immune to thermal drift. Its value lies not in spectacle, but in the quiet precision of every measurement—reliable, repeatable, relentless. Choosing the LT1005-S/SP8 means selecting a battle-tested, industrial-grade solution—silent, yet never absent.