ZMCT103C 5A Range Single Phase AC Active Output Onboard Module

The ZMCT103C 5A Range Single Phase AC Active Output Onboard Module is a highly reliable and precise AC current sensing module commonly used in energy monitoring, smart home automation, industrial control, and IoT-based current measurement systems. It is based on the ZMCT103C micro-precision current transformer, known for stable output, minimal temperature drift, and superior electrical isolation.

This module converts AC current (up to 5A) into a measurable analog output voltage compatible with microcontroller ADC pins, making it an ideal choice for Arduino (https://electroway.org/product-category/arduino-and-accessories/arduino-boards/), NodeMCU (https://electroway.org/product-category/iot-and-smart-solutions/iot-modules/nodemcu/), Raspberry Pi, ESP32, STM32, and other development boards used across both DIY and professional projects.

✅ Key Features

• Measures 0–5A single-phase AC current

• Built-in precision burden resistor

• Provides active analog output

• High electrical isolation for safety

• Compact onboard module design

• Stable performance with low noise

• Ideal for energy meters, power monitoring, overload protection

🛠 Technical Specifications

📌 How It Works

The ZMCT103C transformer converts AC current into a small proportional signal. The onboard circuitry conditions this signal into an analog voltage suitable for microcontroller ADC input. This allows real-time current measurement, energy monitoring, and fault detection.

⚡ Applications

This module is widely used in:

• Smart energy meters

• Solar inverters and battery management systems

• Home automation

• Industrial machine monitoring

• AC load over-current protection

• IoT energy dashboards

• Smart appliances

• Data logging and monitoring software

If you are building an IoT system with Arduino, explore related electronics in our Arduino & Accessories category:
👉 https://electroway.org/product-category/arduino-and-accessories/

You can also check compatible Electronics Components here:
👉 https://electroway.org/product-category/electronics-components/

⚠ Precautions

• Ensure AC wiring is properly insulated.

• Do not measure DC current—module is designed only for AC.

• Avoid exceeding the 5A rating.

• Install in a ventilated area to avoid heat buildup.

• Always disconnect power before wiring.

• Use proper load resistors if interfacing with sensitive ADC modules.

🎥 YouTube Tutorial Reference

Learn how to use AC current sensors like the ZMCT103C with Arduino:

Watch Video:https://www.youtube.com/watch?v=B8PJlkYSkTw

🔎 Summary

The ZMCT103C 5A Single Phase AC Active Output Module is a precise, compact, and safe AC current sensor used in smart energy systems, protection circuits, IoT dashboards, and industrial monitoring. With reliable electrical isolation and stable analog output, it integrates seamlessly with microcontrollers like Arduino and NodeMCU for real-time current measurement.