WCS1800 Hall Effect Current Sensor Module, 35A Overcurrent/Short Circuit Protection Detector for Arduino/Power Supply

Description

The WCS1800 Current Sensor Module is a Hall-effect-based detection board designed for non-invasive AC/DC current measurement up to ±35A DC (25A RMS AC), with integrated overcurrent and short-circuit protection signaling. Built around the Winson WCS1800 linear Hall sensor IC, the module features a 9.0mm through-hole conductor that allows the measured wire to pass directly through without breaking or modifying the existing circuit layout . The sensor outputs an analog voltage proportional to the current, centered at VCC/2 (typically 2.5V at 5V supply) when no current flows, with a sensitivity of approximately 60 mV/A — the highest sensitivity in the WCS series, providing the best resolution for lower-current measurements . The module adds a comparator circuit (typically LM393) with an adjustable potentiometer, enabling users to set an overcurrent threshold across a usable range of approximately 0.5A to 35A . When the measured current exceeds the set threshold, the module provides both an analog output for measurement and a digital TTL signal for direct microcontroller or relay control. This makes it suitable for individual makers building motor stall protection or short-circuit detection systems, as well as business purchasers seeking a cost-effective, isolated current monitoring solution for power supplies, battery systems, and industrial equipment diagnostics.

Features

• Highest Sensitivity in the WCS Series: At ~60 mV/A, the WCS1800 provides the best resolution for measuring low-to-moderate currents, making it ideal where accuracy matters more than raw range .

• Non-Invasive Through-Hole Sensing: The 9.0mm conductor hole allows the measured wire to pass through without electrical connection, preserving circuit integrity and providing galvanic isolation up to 4000V .

• Adjustable Overcurrent Threshold: An onboard potentiometer allows the overcurrent trip point to be set across a usable range of roughly 0.5A to 35A .

• Dual Output Signals: Provides both an analog voltage output (proportional to current) for ADC measurement and a digital TTL-level output that changes state when overcurrent is detected .

• Visual Status Indicators: Includes a power indicator LED and a separate overcurrent indicator LED that illuminates when the set threshold is exceeded.

• Wide Supply Voltage Range: The WCS1800 IC operates from 3.0V to 12V, though module boards are typically configured for 5V DC operation .

Technical Specifications