The **LPCE-653-R/Q** is a high-performance, low-profile, surface-mount common mode choke manufactured by **Sumida**. It is primarily designed for high-current automotive and industrial power applications where space is limited but noise suppression is critical. --- ### 1. Key Technical Specifications | Parameter | Specification (Typical) | | :--- | :--- | | **Component Type** | Common Mode Choke / Power Line Filter | | **Inductance** | Varies by sub-model (typically 1.0 mH to 10 mH) | | **Rated Current** | Up to 13A (depending on specific inductance value) | | **Operating Temperature** | -40°C to +125°C (including self-heating) | | **Dimensions** | Approx. 21.0 x 21.0 x 14.5 mm | | **Mounting Type** | Surface Mount (SMD) | | **Compliance** | AEC-Q200 Qualified (Automotive Grade) | --- ### 2. Core Electronic Characteristics #### Noise Suppression (Common Mode) The primary function of the LPCE-653-R/Q is to filter out **Common Mode Noise**—interference that travels in the same direction on both power lines. By utilizing a high-permeability ferrite core, it provides high impedance at targeted frequencies to block EMI (Electromagnetic Interference) while allowing DC power to pass with minimal resistance. #### Magnetic Construction * **Toroidal Design:** The use of a toroidal (ring-shaped) core ensures high efficiency and low magnetic flux leakage. * **Flat Wire Technology:** Sumida often utilizes flat wire windings in this series to reduce DCR (DC Resistance), which minimizes heat generation and allows for higher current handling in a smaller footprint. #### AEC-Q200 Qualification The "Q" in the part number often denotes **Automotive Grade** qualification. This means the component has undergone rigorous stress testing for: * High-temperature exposure. * Thermal shock and vibration resistance. * Mechanical integrity in harsh environments. --- ### 3. Common Applications Due to its high current rating and compact profile, the LPCE-653-R/Q is found in several specific circuits: * **On-Board Chargers (OBC):** Filtering noise in Electric Vehicle (EV) charging systems. * **DC/DC Converters:** Reducing ripple and switching noise in high-power converters. * **Infotainment Systems:** Ensuring clean power delivery to sensitive automotive electronics. * **Industrial Power Supplies:** General-purpose EMI filtering for high-wattage equipment. --- ### 4. Part Number Breakdown (Prefixes) * **LPCE:** Series name (Low Profile Common Mode Choke). * **653:** Physical size/form factor code. * **R/Q:** "R" typically refers to RoHS compliance, while "Q" indicates Automotive Grade qualification.