HTFS 800-P , HTFS800-P

HTFS800-P High-Precision Hall-Effect Open-Loop Current Transducer

HTFS800-P Product Overview

The HTFS800-P is a high-precision Hall-effect open-loop current transducer from LEM, a world-renowned sensor manufacturer. Designed for accurate AC/DC current measurement, this model is widely used in automotive electronics, motor drives and control, power supplies, test and measurement, and industrial automation. It is recognized in the market for its outstanding performance, stability, and reliability.

HTFS800-P Key Advantages – High-Performance, Reliable Current Measurement Solution

High Current Rating, Wide Measuring Range
The HTFS800-P supports a nominal current rating of up to 800A and offers a wide measuring range of ±1200A, easily handling complex current waveforms in high-current applications.

±1% High Accuracy – Capture Every Current Change Precisely
With ±1% accuracy and better than ±0.5% linearity (at I PN, T A = 25°C), the sensor ensures consistent and precise current data acquisition, meeting stringent accuracy requirements in demanding applications.

Microsecond Response – Real-Time Monitoring without Delay
Response time as low as 3.5µs enables real-time capture of transient current changes, ideal for high-dynamic applications such as variable frequency drives, switch-mode power supplies, and UPS systems.

Wide Bandwidth – DC to 240kHz without Attenuation
Bandwidth from DC to 240kHz allows simultaneous measurement of DC, AC, and mixed current signals, suiting a variety of electrical environments.

Single 5V Supply, Ultra-Low Power Consumption
Operates on a single 5V (±5%) supply with a maximum supply current of only 25mA. The Hall-effect principle provides galvanic isolation between primary and secondary circuits, ensuring system safety.

Wide Operating Temperature – Stable in Extreme Environments
Operating temperature range of -40°C to +105°C guarantees long-term stable operation in harsh industrial environments without compromising measurement accuracy.

Compact Design, Flexible Mounting
Dimensions of just 46 × 40 × 17.5 mm, with an ultra-slim profile that saves valuable PCB space. The 22mm aperture accommodates large-diameter conductors. Mounting options include screw or soldering fixation for versatile installation.

Dedicated ASIC Design – Excellent Noise Immunity
An embedded ASIC (Application-Specific Integrated Circuit) gives the sensor outstanding immunity to external interference, ensuring accurate and reliable measurements even in electromagnetically noisy industrial sites.

Reference Pin – Enhanced Application Flexibility
The HTFS800-P features an additional reference pin on the output side, which can access the ASIC’s internal reference voltage and directly supply it to an ADC, or receive an external reference voltage (2V to 2.8V) from a DSP/ADC. This feature eliminates reference temperature drift and significantly improves system accuracy – a key advantage not found in conventional current sensors.

Six Ratings in One Package – Simplified Design and Selection
The HTFS series covers current ratings from 200A to 800A, with six models sharing the same package size. Engineers can choose different ratings on the same design platform, greatly reducing selection and design cycles.

Safety Compliant, Quality Assured
Housing made of UL94 V-0 rated flame-retardant plastic, RoHS compliant, meeting international electrical safety standards – safe and reliable.

HTFS800-P Applications – Empowering Critical Electronic Equipment

Electric Vehicles & Charging Piles
Used in battery management systems (BMS) for current monitoring, in on-board chargers (OBC) for input/output current detection, and in charging piles for real-time current supervision, ensuring safe and controllable charging.

Motor Drives & Variable Frequency Control
Ideal for AC variable frequency drives, forklift drive systems, and DC motor drive static converters – monitors motor operating current in real time for precise speed and torque control.

Power Management
Widely used in UPS systems, switch-mode power supplies (SMPS), welding power supplies, and more, providing accurate current feedback to ensure stable output.

Industrial Automation
Serves as a critical current monitoring sensor in industrial control cabinets, energy storage systems, test and measurement equipment, and equipment maintenance diagnostics, enabling real-time system status monitoring.

Fault Diagnosis
In power electronic systems, the HTFS800-P can be deployed on individual branches for real-time current monitoring. When a MOSFET fails on one branch, the sensor quickly detects abnormal current or zero current – allowing precise fault location without powering down and checking each branch, greatly improving system maintainability.

Why Choose the HTFS800-P?

World-Leading Brand – LEM is a global leader in current sensing, known for high precision and reliability.

Multi-Functional – One sensor measures both AC and DC, reducing BOM management costs.

Fast Response – Microsecond response captures transient current changes without missing any anomalies.

Flexible Mounting – Supports through-hole PCB mounting, adaptable to various mechanical structures.

Safe Isolation – Hall-effect principle provides inherent galvanic isolation, protecting operators and downstream circuits.

Excellent Noise Immunity – Dedicated ASIC design performs reliably even in noisy industrial environments.

Six Ratings, One Package – From 200A to 800A, multiple options with unified footprint for design flexibility.

In-Stock Availability – Popular model, ample stock, easy procurement.

HTFS800-P Technical Specifications