LT1005-S/SP40，LT 1005-S/SP40

‌LT1005-S/SP40: Precision Current Sensing for Demanding Power Systems‌

LT1005-S/SP40 ‌Product Overview

The LT1005-S/SP40 employs a closed-loop (compensated) Hall effect principle, using a feedback coil to nullify the magnetic field generated by the primary current. This zero-flux operation eliminates nonlinearities and temperature drift, delivering a pure, isolated replica of the measured current. The result is a signal with exceptional fidelity—ideal for real-time control loops in high-stakes environments.

LT1005-S/SP40 ‌Key Features

‌High Accuracy‌: Overall accuracy better than ‌0.4%‌ at 25°C, with linearity under ‌0.1%‌, ensuring control systems receive true current feedback.

‌Extended Measurement Range‌: Rated for ‌1000 A RMS‌, with full-scale capability up to ‌±2000 A‌, handling motor inrush, fault currents, and transient overloads without saturation.

‌Wide Operating Temperature‌: Functions reliably from ‌-40°C to +85°C‌, maintaining performance in cold-start conditions and high-temperature enclosures.

‌Dual-Supply Compatibility‌: Operates on ‌±15 V to ±24 V‌ bipolar DC supplies, compatible with standard industrial power rails without additional regulation.

‌Current Output‌: Delivers a proportional ‌±200 mA‌ instantaneous current signal, inherently resistant to noise and ideal for long-distance transmission in electrically noisy environments.

‌Large Aperture‌: ‌40.5 × 40.5 mm‌ through-hole design allows direct installation around busbars or thick cables, eliminating circuit disassembly during integration.

‌Robust Isolation‌: Designed with reinforced insulation and extended creepage distances to meet industrial safety standards for high-voltage isolation.

LT1005-S/SP40 ‌Technical Specifications‌

‌Measurement Type‌: DC, AC, and pulsed currents

‌Primary Nominal Current‌: 1000 A RMS

‌Measuring Range‌: 0 to ±2000 A

‌Secondary Output‌: ±200 mA (full scale)

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

‌Isolation Voltage‌: 6 kV RMS, 50 Hz, 1 minute

‌Response Time‌: Less than ‌1 μs‌

‌Output Drift‌: Minimal over temperature, ensuring long-term stability

‌Core Material‌: High-permeability magnetic core with closed-loop compensation

‌Enclosure‌: UL 94-V0 rated insulated plastic housing, optimized for industrial durability

LT1005-S/SP40 ‌Applications

The LT1005-S/SP40 is the sensor of choice in systems where failure is not an option:

‌Industrial Motor Drives‌: Enables precise torque and speed control in servo and variable-frequency drives

‌Renewable Energy Inverters‌: Monitors grid-tied current in photovoltaic and wind power systems with high dynamic response

‌Railway Traction Systems‌: Used in locomotive and metro propulsion inverters, meeting stringent reliability and safety standards

‌High-Current Welding Equipment‌: Tracks arc current waveforms to ensure weld consistency and equipment longevity

‌Test & Calibration Systems‌: Serves as a reference sensor in laboratory-grade power analyzers and metrology setups

‌Why Choose the LT1005-S/SP40?‌

Beyond its specifications, the LT1005-S/SP40 delivers ‌system-level advantages‌ that reduce design complexity and lifecycle cost:

‌Zero Calibration Drift‌: The closed-loop architecture inherently compensates for temperature and aging effects—no field recalibration needed.

‌Immunity to External Fields‌: Fully shielded magnetic core rejects interference from nearby conductors or transformers.

‌Noise-Resistant Output‌: Current-mode output avoids ground loops and common-mode voltage issues common with voltage-output sensors.

‌Passive Isolation‌: No optocouplers or isolation transformers required—reducing component count and failure points.

‌Industrial-Grade Reliability‌: Designed for continuous operation under vibration, dust, and thermal cycling—built to last.