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ZMCT103C 5A Current Transformer (CT)

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Whether you are designing custom IoT AC energy meters, building a smart home power monitoring system, or prototyping industrial safety equipment, the ZMCT103C 5A Current Transformer delivers highly accurate, non-invasive AC current measurement.

Designed for seamless integration with microcontrollers like the Arduino, ESP32, STM32, this micro-precision transformer safely isolates your low-voltage logic from high-voltage AC mains. It features a 1000:1 turns ratio, meaning a 5A AC load will produce a highly linear, easy-to-measure 5mA AC output.

Perfect For:

  • IoT Energy Metering: Build reliable, scalable smart meters to monitor household or appliance power consumption.

  • Over-Current Protection: Design fast-acting shut-off systems for motors and heavy loads.

  • Microcontroller Interfacing: Easily convert the output via a sampling resistor for precise ADC readings on ESP32 or STM32 platforms.

Technical Specifications:

  • Model: ZMCT103C

  • Rated Input Current: 5A

  • Rated Output Current: 5mA

  • Turns Ratio: 1000:1

  • Phase Angle Error: ≤ 15' (at rated input)

  • Linear Range: 0 ~ 5A (with a 50Ω sampling resistor)

  • Isolation Voltage: 4500V

  • Operating Temperature: -40°C to +85°C

  • Mounting: PCB through-hole design for secure, permanent installation

Ensure your order is placed by 2PM to guarantee next-day delivery! Our commitment to prompt service includes a 24-hour delivery system through our network of carriers, aimed at ensuring your package arrives right on schedule.

Please note, a delivery fee of €4.99 applies for orders under €50. For those in remote areas, be aware that our couriers may apply an extra surcharge. This additional fee helps cover the costs of transporting your items to harder-to-reach locations.