CT 40A Current Transformer (2500 Turns) with Wire Leads

Overview & Features Measuring high-voltage AC current safely and accurately is a fundamental requirement for modern energy monitoring systems. The 40A Current Transformer (2500 Turns) allows you to measure AC current up to 40 Amps non-intrusively, providing complete galvanic isolation between your high-voltage mains and your sensitive low-voltage microcontrollers. Available at Tomson Electronics, this solid-core toroidal transformer features a 1:2500 turns ratio. This means that for a maximum 40A load passing through the center hole, the transformer induces a highly linear, proportional micro-current (up to 16mA) out of its attached flying wire leads. These pre-attached wire leads make it incredibly easy to connect the sensor directly to a PCB terminal block or custom energy-metering circuit without the hassle of soldering rigid PCB pins. Also searched as: 40A CT sensor, 2500T toroidal current sensor, AC power measurement module, 40 amp current transformer with wires, inductive current sensor. Technical Specifications Maximum Primary Current: 40A AC Turns Ratio: 1:2500 (2500T) Output Signal: AC Current (approx. 16mA output at 40A primary) Core Type: Solid Toroidal Ring (requires wire to be threaded through the center) Connection Type: Insulated Flying Wire Leads Isolation Voltage: Highly isolated (Galvanic isolation between primary and secondary) Common Applications Smart Home Energy Monitors: Building custom Arduino or ESP32-based whole-room power meters to track real-time

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