The **M5CT-10-R/Q** refers to a high-performance, compact current transformer (CT) typically utilized in power monitoring, energy management, and electronic protection circuits. ### 1. Technical Specifications The "M5CT" series is known for high accuracy and a miniature footprint, designed for PCB mounting. | Parameter | Specification (Typical) | | :--- | :--- | | **Turns Ratio** | 1000:1 or 2000:1 (Model dependent) | | **Rated Input Current** | 10A - 20A | | **Maximum Current** | Up to 60A | | **Output Type** | Current output (requires burden resistor) | | **Accuracy Class** | 0.1 or 0.2 Grade | | **Dielectric Strength** | 2500V - 4000V AC | | **Frequency Range** | 50Hz / 60Hz | --- ### 2. Key Features * **Encapsulation:** Usually epoxy-encapsulated for moisture resistance and mechanical stability. * **Linearity:** Offers a highly linear relationship between the primary current and secondary output, essential for precision metering. * **Phase Shift:** Minimal phase angle error, which is critical for calculating active power (Wattage) correctly. * **Safety:** Provides galvanic isolation between the high-current AC line and the low-voltage micro-controller (MCU) circuitry. --- ### 3. Application Circuitry When integrating this part into an electronic system, it is typically used with a "burden resistor" to convert the current output into a measurable voltage. ```cpp // Logic for interpreting the value in a microcontroller float getACCurrent(int analogPin) { int sensorValue = analogRead(analogPin); // Convert ADC steps to Voltage float voltage = (sensorValue / 1024.0) * 5.0; // Convert Voltage back to Current based on Burden Resistor and Turns Ratio float secondaryCurrent = voltage / BURDEN_RESISTOR; return secondaryCurrent * TURNS_RATIO; } ``` ### 4. Mounting and Pinout * **P1/P2 (Primary):** Often a hole through the center of the transformer where the AC wire passes. * **S1/S2 (Secondary):** PCB pins that output the proportional low-level current. ---