ZMCT103C AC Current Sensor Module
The ZMCT103C AC Current Sensor Module is a compact and safe solution for measuring AC current without direct contact. It provides an isolated analog output, making it ideal for Arduino, IoT, and energy monitoring applications.
Key Features
- Non-invasive AC current sensing
- Electrical isolation for safety
- Analog output proportional to current
- Compact and lightweight
- Easy integration with Arduino & ESP32
Technical Specifications
- Model: ZMCT103C
- Input Current: 5A AC
- Output: Analog Voltage
- Frequency: 50–60Hz
- Operating Temp: -40°C to +85°C
- Isolation: Yes
Pinout
- VCC – Power Supply
- GND – Ground
- OUT – Analog Signal Output
Working Principle
This module uses a current transformer to sense AC current flowing through a wire. The induced signal is converted into an analog voltage readable by a microcontroller.
Applications
- Energy monitoring systems
- Smart meters
- Home automation
- Overcurrent protection
- Arduino & IoT projects
Wiring Guide
- Connect VCC to 5V
- Connect GND to Ground
- Connect OUT to Analog Pin (A0)
- Pass AC wire through sensor
Package Includes
- 1 × ZMCT103C Current Sensor Module
Important Notes
- Works only with AC (not DC)
- Calibration required for accurate readings
- Handle high voltage connections carefully
Compatibility
- Arduino Uno / Nano / Mega
- ESP8266 / ESP32
- Raspberry Pi (with ADC)



