LT505-S/SP10 High-Precision Closed-Loop Hall Effect Current Transducer

LT505-S/SP10 Precision · Reliability · Stability — Engineered for Demanding Industrial Applications

In applications such as servo drives, variable frequency drives, and power supplies, the accuracy and stability of current measurement directly determine system reliability and safety. The LT505-S/SP10 closed-loop Hall effect current transducer, from LEM — a global leader in current sensing technology — is designed for high-power applications with a rated current of 500 A. With outstanding performance and proven quality, it is the trusted measurement partner for engineers worldwide.

LT505-S/SP10 Key Specifications

LT505-S/SP10 Five Key Advantages

High Accuracy & Stability — No Compromise

Using closed-loop (compensated) Hall effect technology, the LT505-S/SP10 achieves 0.6% accuracy and excellent linearity. With very low temperature drift across the full temperature range, it delivers reliable measurements under both rated and overload conditions. A wide measuring range of ±1200 A handles all common current fluctuation scenarios.

Fast Response — Milliseconds Matter

With a wide bandwidth of 150 kHz and optimized response time, the LT505-S/SP10 accurately captures DC, AC, and pulsed currents — including fast-changing transient currents. This is critical for high dynamic response applications such as servo motor drives and high-frequency switching power supplies.

Electrical Isolation — Safety First

The LT505-S/SP10 provides complete electrical isolation between the high-voltage primary circuit and the low-voltage electronic circuit. This protects downstream sensitive electronics and ensures operator safety. The housing is made of UL 94-V0 flame-retardant insulating material, leaving no compromise on safety.

High Immunity to Interference — Works in Harsh Environments

Electromagnetic interference is a major enemy of measurement accuracy in industrial sites. The LT505-S/SP10 features excellent immunity to external interference. EMC compliance meets European standards and carries the CE mark, ensuring stable output even in electrically noisy environments.

No Insertion Loss — Energy Efficient

Unlike conventional shunts or transformers, this transducer introduces virtually no insertion loss during measurement. It does not consume additional energy from the system — a valuable feature in today’s energy-conscious world.

LT505-S/SP10 Typical Applications

The LT505-S/SP10 is widely used in the following power electronics fields:

AC variable speed drives and servo motor drives — Perfect assistant for motor control

Static converters for DC motor drives — Key component in industrial drives

UPS (uninterruptible power supplies) — Ensuring power continuity for critical equipment

SMPS (switched-mode power supplies) — Quality monitoring in high-frequency power supplies

PV inverters (MPPT) and solar combiner boxes — Critical sensing node in renewable energy systems

Welding equipment power supplies — Stable measurement in high-current scenarios

Battery-powered systems — Energy storage and vehicle applications

Why Choose the LT505-S/SP10?

Original manufacturer, assured quality. LEM is a world-leading manufacturer of current and voltage transducers, serving industries such as industrial automation, rail, energy, and automotive. With proven closed-loop Hall effect technology and a strict quality management system, LEM products are trusted worldwide. The LT505-S/SP10 complies with IEC 61010-1 safety standards and EMC Directive 2004/108/EEC. Every unit undergoes rigorous testing from design to final shipment.