20A SCT Current Transformer – Non-Invasive AC Current Sensor with Analog Signal Conversion Module

The 20A SCT Current Transformer Kit offers a safe, non-contact, and highly accurate solution for monitoring AC current in wires without breaking the circuit. With a split-core clamp design, this sensor simply snaps around a live or neutral wire to sense the current flowing through it.

It outputs a small AC voltage signal via a 3.5mm plug, ideal for microcontrollers or signal processing modules in energy metering, current monitoring, or over-current protection systems. Designed with safety and ease of installation in mind, it's perfect for high-voltage environments where direct electrical contact is risky.

Features

• Non-invasive Split Core Transformer – Clamp design for easy installation without modifying wires

• Compatible with 3.3V / 5V Microcontrollers

• Analog Voltage Output: Easily readable by ADCs (0.2V – 2.8V)

• High Safety: No electrical contact with AC line

• Accurate Current Sensing: ±1% accuracy and ≤±0.2% non-linearity

• Compact & Lightweight

• Current Range: 0 – 20A AC

• Output Signal: 0–1V AC (via standard Φ3.5mm 3P plug)

• Accuracy: ±1%

• Non-linearity: ≤±0.2%

• Frequency Range: 50Hz – 1kHz

• Operating Temperature: -25°C to +70°C

• Opening Size: 13 × 13 mm (0.51 × 0.51 in)

• Weight: 50g

Applications

• Smart home energy meters

• AC current monitoring in motors, HVAC systems, lighting

• Appliance energy tracking and usage profiling

• Industrial equipment current supervision

• Educational and DIY electronics projects

• IoT-based energy monitoring systems