The **LPCA-653-R/Q** is a high-performance, compact current sensor manufactured by **Triad Magnetics**. It belongs to the LPCA series and is designed for applications requiring high-frequency current monitoring and precision power management. --- ### 1. Key Technical Specifications The following table highlights the primary electrical characteristics of the LPCA-653-R/Q: | Parameter | Specification | | :--- | :--- | | **Secondary Turns** | 500 | | **Current Rating (RMS)** | 25 Amps | | **Frequency Range** | 20 kHz to 200 kHz | | **Secondary Resistance** | 10.0 Ohms (Max) | | **Hole Diameter** | 6.5 mm | | **Operating Temperature** | -40°C to +85°C | --- ### 2. Electronic Components and Construction The device is a **Current Sense Transformer**, which functions based on Faraday’s Law of Induction. It consists of the following internal "parts" and design features: * **Toroidal Core:** Uses a high-permeability ferrite material optimized for high-frequency switching environments. * **Secondary Winding:** 500 turns of fine copper wire wound precisely around the core to ensure a linear output. * **Encapsulation:** The internal coil is housed in a UL 94V-0 rated flame-retardant plastic case, protecting it from moisture and mechanical stress. * **Primary Path:** There is no internal primary wire. The user passes a conductor (carrying the current to be measured) through the 6.5mm center hole, acting as a single-turn primary. --- ### 3. Application and Usage To use the LPCA-653-R/Q in an electronic circuit, it must be paired with a **Burden Resistor ($R_b$)**. The output voltage ($V_{out}$) is calculated using the following formula: `V_out = (I_primary / N_secondary) * R_b` #### Typical Use Cases: 1. **Switch Mode Power Supplies (SMPS):** Monitoring current in high-frequency converters. 2. **Motor Control:** Detecting overcurrent conditions in industrial drives. 3. **Digital Power Management:** Providing feedback for microprocessor-controlled power stages. --- ### 4. Part Number Suffix Meaning * **-R:** Indicates compliance with **RoHS** (Restriction of Hazardous Substances) standards. * **-Q:** Often denotes **Automotive Grade** or specific Quality Assurance testing protocols (depending on the specific production batch and Triad's internal categorization). ---