LT1005-T/SP39，LT 1005-T/SP39

‌LT1005-T/SP39 Product Details: The Industrial Benchmark for High-Current Closed-Loop Measurement

‌

LT1005-T/SP39 ‌Product Description‌
The LT1005-T/SP39 is a closed-loop Hall effect current sensor from LEM, specifically engineered for high-precision measurement of DC, AC, and pulsed currents up to 1000 A RMS in demanding industrial environments. Building on the zero-flux compensation technology of the LT series, it delivers galvanic isolation up to 6 kV RMS between primary and secondary circuits, producing a proportional 200 mA current output that remains drift-free even under extreme electromagnetic interference. As a variant of the LT1005-T/SP31, the SP39 maintains identical electrical performance while benefiting from enhanced manufacturing consistency and tighter batch control—ensuring seamless replacement across production lines and extended equipment lifecycles without re-certification or recalibration.

LT1005-T/SP39 ‌Key Features‌

‌Closed-Loop Zero-Flux Architecture‌: Achieves ±0.4% accuracy through magnetic flux balancing, eliminating temperature drift and zero-point offset across the full -10°C to +85°C operating range.

‌Current-Mode Output for Superior Noise Immunity‌: Outputs a 200 mA full-scale proportional current signal—naturally resistant to common-mode noise—enabling reliable long-distance transmission in high-EMC environments such as drive cabinets and traction systems.

‌Non-Intrusive Through-Hole Installation‌: Features a 40.5 mm × 40.5 mm square aperture allowing installation without breaking the main circuit, minimizing thermal stress and maximizing system uptime.

‌Wide Bipolar Supply Range‌: Compatible with ±15 V to ±24 V power supplies, simplifying integration across diverse industrial power architectures and reducing design complexity.

‌Industrial-Grade Environmental Robustness‌: Encased in UL94V-0 flame-retardant material with IP54-level protection against dust, moisture, and vibration—designed for continuous operation in harsh industrial and outdoor enclosures.

‌Ultra-Fast Dynamic Response‌: With a response time of ≤1 µs and bandwidth up to 100 kHz, it accurately captures current transients, switching spikes, and harmonic content—ideal for IGBT-based drives, welding systems, and high-frequency inverters.

LT1005-T/SP39 ‌Technical Specifications‌

‌Rated Current‌: 1000 A RMS

‌Measurement Range‌: 0 to ±2000 A (transient)

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

‌Output Type‌: Proportional current (200 mA full-scale)

‌Accuracy‌: ±0.4%

‌Response Time‌: ≤1 µs

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

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

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

‌Certifications‌: EN 50155 (railway), EN 50178 (industrial electrical equipment), RoHS, REACH

LT1005-T/SP39 ‌Applications‌
The LT1005-T/SP39 serves as the core sensing element in high-power industrial systems requiring precise current control and safety monitoring, including:

Industrial variable frequency drives and servo systems for torque closed-loop control and overload protection

Large-scale photovoltaic and energy storage inverters for MPPT feedback and grid-current regulation

Electric vehicle DC fast-charging stations to ensure safe, efficient high-power delivery

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

High-frequency induction welding power supplies to maintain arc stability and weld quality consistency

Uninterruptible power supplies (UPS) and high-power switch-mode power supplies for real-time input/output monitoring and protection

‌Why Choose LT1005-T/SP39 This Model‌
The LT1005-T/SP39 does not compete on peak specs—it delivers ‌engineering certainty‌. In industrial systems with lifecycles exceeding a decade, changing a sensor model triggers costly re-certification, re-tuning, and unplanned downtime. The SP39 variant, electrically identical to the SP31, guarantees seamless cross-batch and cross-line replacement through superior manufacturing consistency. Its current-output architecture, wide-temperature resilience, and EMI robustness have been validated across tens of thousands of global installations. Choosing the LT1005-T/SP39 is not about selecting a component—it’s about selecting ‌a proven, zero-risk solution‌. It doesn’t shout. It never fails.