LAS 50-TP Current Sensor | High Accuracy · Nanosecond Response · PCB Through-Hole Mount

LAS 50-TP Product Overview

The LAS 50-TP is a high-performance current sensor from Swiss brand LEM, based on innovative Eta technology. It is specifically designed for electronic measurement of DC, AC, pulsed, and mixed currents, providing galvanic isolation between the high-power primary circuit and the low-power electronic circuit to ensure system safety and signal integrity.

Whether you are developing servo drives, frequency converters, UPS, switch-mode power supplies, or need precise current monitoring for battery systems, the LAS 50-TP delivers better than ±1% accuracy and nanosecond-class fast response to reliably support your design.

Key highlights: Eta technology | ±1% accuracy | 200 ns reaction time | ±150 A measuring range

LAS 50-TP Core Technical Advantages

Eta Technology

Combining the best of open-loop and closed-loop

The LAS 50-TP uses LEM’s newly developed Eta technology, merging the advantages of open-loop and closed-loop sensors: high accuracy from closed-loop designs and wide measuring range from open-loop designs, plus greater flexibility through a programmable ASIC. In short: more accurate than open-loop, more practical than closed-loop.

Accurate Measurement, Nanosecond Response

Better than ±1% accuracy – At rated current, accuracy exceeds ±1%, with linearity error <0.7%, ensuring trustworthy measurement results.

200 ns reaction time – The sensor responds almost instantly to sudden current changes, giving valuable time for overcurrent protection.

500 ns step response time – The full process from detection to 90% output takes only 500 ns, suitable for high-frequency control loops.

DC to 100 kHz wide bandwidth – Handles DC to 100 kHz current signals, covering most industrial applications.

Extremely Low Temperature Drift, Stable Across Full Temperature Range

Wide operating temperature: -40°C to +85°C, suitable for harsh environments from severe cold to high heat.

Vout temperature coefficient only 80 ppm/K (typical) – stable output even under extreme conditions.

LAS 50-TP Key Specifications

LAS 50-TP Typical Applications

The LAS 50-TP is widely used wherever high-precision current sensing is required:

Variable Frequency Drives & Servo Control

Current closed-loop control for AC variable speed drives and servo motor drives

Current sensing for static DC motor drives

Power Management & Uninterruptible Power Supplies

Current monitoring and control for UPS (Uninterruptible Power Supplies)

Real-time current feedback for switch-mode power supplies (SMPS)

Power monitoring for welding equipment

Battery & Energy Storage Systems

Accurate monitoring of battery charge/discharge current

Current management for energy storage systems

Industrial Automation & Home Appliances

Current sensing for household appliances

Current control for air conditioning systems

Signal sampling in general industrial automation equipment

Application sources: Farnell and LEM official documentation

Why Choose the LAS 50-TP?

From performance to reliability, elevate your design

When selecting a current sensor, accuracy, speed, and reliability are indispensable. The LAS 50-TP is built for exactly that:

Nanosecond protection window
A <200 ns reaction time means the controller knows and responds faster when an overcurrent occurs. This is critical for applications like servo drives and motor protection where response speed is paramount.

±150 A wide measuring range
50 A rated, but can measure up to ±150 A – even if the load momentarily overshoots, the sensor continues to provide accurate output, avoiding the risk of outofcontrol saturation.

Operates from -40°C to +85°C
From outdoor equipment in freezing winters to industrial sites in hot environments, the LAS 50-TP works reliably without additional compensation or temperature control.

UL 94-V0 certified + 5 kV isolation voltage
Safety-designed with a flame-retardant rating and high isolation withstand voltage, providing solid support for your equipment to pass safety certifications.

Compact PCB through-hole design
Through-hole package with compact dimensions (33.2 mm × 14.93 mm × 20.15 mm) – can be soldered directly onto the PCB, saving installation costs and facilitating mass production.

Swiss brand – LEM
LEM is a leading global brand in electrical measurement, with products widely used in industry, rail, energy, automation, and automotive. Choosing the LAS 50-TP means choosing quality proven in the field.