HTB100-TP Hall Effect Current Transducer

HTB100-TP Product Overview

The HTB100-TP is a high-accuracy Hall-effect open-loop current transducer from LEM’s HTB series. It is designed for electronic measurement of DC, AC, pulsed, and mixed currents. The transducer provides 2500V electrical isolation between the primary (high-power) circuit and the secondary (electronic) circuit, ensuring measurement safety and signal integrity in high-voltage environments.

Whether you are developing variable frequency drives, switching power supplies, UPS systems, or battery-powered equipment, the HTB100-TP delivers stable, precise, and noise-immune current feedback — a measurement solution that power electronics engineers can trust.

HTB100-TP Key Specifications at a Glance

Why Choose the HTB100-TP?

1. Wide Measuring Range – Handle Current Surges with Ease

Rated 100A but capable of measuring up to ±300A — a 3× overload capability means you no longer need to “leave margin” for occasional high-current transients. Whether it’s motor inrush current or power supply surges, the HTB100-TP captures them accurately.

2. 3µs Fast Response – Capture Every Transient Detail

With a response time of just 3µs and bandwidth from DC to 50kHz, the HTB100-TP quickly and faithfully reproduces motor inrush currents, high-frequency ripple in switching power supplies, and high-speed PWM waveforms at inverter outputs.

3. Compact Size – Free Up Valuable PCB Space

Occupies only 4.3cm² of board area and stands just 34mm tall. In the competitive world of power electronics, every square centimeter counts toward cost and design flexibility. The HTB100-TP’s cleverly compact design makes your layout, heat dissipation, and component placement much easier.

4. Hall-Effect Open-Loop Principle – High Value for Money

Based on Hall-effect open-loop technology, it delivers 1% accuracy while maintaining low power consumption, small size, and attractive cost. With built-in signal conditioning, it outputs a clean 0–4V voltage signal ready for direct sampling by MCUs or DSPs.

5. Excellent Noise Immunity & Wide Temperature Range

Designed with high immunity to electromagnetic interference, the HTB100-TP stays stable even in harsh electrical environments. Its operating temperature range of -40°C to 80°C guarantees consistent performance whether in freezing winters or inside hot equipment cabinets.

HTB100-TP Key Features

Hall-effect sensing — non-contact, lossless measurement

2500V electrical isolation — safe isolation, protects low-voltage control circuits

Low power consumption — maximum supply current only 15mA, ideal for portable and battery-powered devices

Built-in primary busbar — the -TP version integrates the primary conductor for plug-and-play use, no extra wiring needed

RoHS compliant — environmentally friendly, free of hazardous substances

HTB100-TP Typical Applications

The HTB100-TP is widely used in:

AC variable speed drives — monitor motor phase currents for precise closed-loop control

DC motor drive static converters — sense bus current to protect power devices

Uninterruptible power supplies (UPS) — detect input/output currents for safe load switching

Switched-mode power supplies (SMPS) — provide current feedback for optimized PWM control

Welding power supplies — precisely control welding current output

Renewable energy storage systems — battery charge/discharge current monitoring

Industrial automation — generalpurpose current sensing and process control