The **ALCT-113-R/Q** is a high-performance, compact current transformer (CT) primarily used in electronic power monitoring, protection circuits, and industrial instrumentation. This component is designed to convert high primary currents into manageable, lower secondary currents for measurement by microcontrollers or energy meters. --- ### Technical Specifications Below are the typical electronic characteristics for the ALCT-113 series: | Parameter | Specification | | :--- | :--- | | **Turns Ratio** | 1:1000 or 1:2000 (standard variants) | | **Rated Primary Current** | 10A - 30A (Max up to 50A depending on model) | | **Secondary Current** | 5mA - 15mA typical | | **Accuracy Class** | 0.1 - 0.5 Class | | **Phase Error** | ≤ 5' (at rated current) | | **Insulation Voltage** | 3000V AC / 1 min | | **Operating Temperature** | -40°C to +85°C | --- ### Key Electronic Components & Construction The ALCT-113-R/Q is composed of several critical materials that define its performance: 1. **Core Material**: High-permeability **Nanocrystalline** or **Permalloy** cores. These materials ensure high linearity even at low current levels and minimal phase shift. 2. **Windings**: Fine copper wire with high-temperature enamel insulation, wound precisely to maintain the specific turns ratio. 3. **Encapsulation**: The unit is "Potted" using **Epoxy Resin**. This provides: * Flame retardancy (UL94-V0 rated). * Protection against moisture and vibration. * High dielectric strength. 4. **Terminals**: Typically PCB-mount pins (THT - Through Hole Technology) for direct soldering onto a printed circuit board. --- ### Application Circuit Basics When using the ALCT-113-R/Q in an electronic circuit, it acts as a current source. To convert this to a voltage that an ADC (Analog-to-Digital Converter) can read, a **Sampling Resistor (Burden Resistor)** is required. #### Calculation Formula: $$V_{out} = \frac{I_{primary}}{Turns Ratio} \times R_{burden}$$ #### Design Implementation: * **Protection**: It is recommended to place TVS diodes in parallel with the secondary winding to prevent high-voltage spikes if the secondary circuit is accidentally opened. * **Filtering**: A simple RC low-pass filter is usually added before the MCU input to remove high-frequency noise. --- ### Comparison: R vs Q Suffixes In the ALCT naming convention: * **-R**: Often denotes **RoHS Compliance** or a specific **Rectangular** footprint. * **-Q**: Usually indicates **Quality Automotive Grade** or a specific high-precision testing standard (QC).