SF3515L-E20 U/L Core SF3515L-E20

Overview

SF3515L-E20 is a high-performance U/L Core manufactured by KDM, a reputable name in passive components. This specific core is designed to provide exceptional magnetic properties, making it an ideal choice for a wide range of power electronics and inductive applications. U/L cores, characterized by their distinct ‘U’ and ‘L’ shaped halves, are assembled to form a closed magnetic path, crucial for efficient energy transfer and storage in inductors, transformers, and chokes. The KDM SF3515L-E20 utilizes advanced core materials to ensure optimal performance in demanding environments, offering engineers and designers a reliable foundation for their magnetic circuit designs. Its robust construction and precise material composition contribute to its superior magnetic characteristics, making it a preferred component for critical applications requiring high efficiency and stability.

Key Specifications

• Series: SF3515L-E20
  This designation identifies the specific product line and model number, ensuring precise component selection and compatibility. The series name often encapsulates design characteristics and performance parameters unique to this particular core, aiding in accurate inventory management and technical referencing.
• Core Material: Si-Fe / Sendust / High Flux
  The core material is a critical attribute determining the magnetic properties of the U/L core. ‘Si-Fe’ (Silicon-Iron) offers good saturation flux density and low cost. ‘Sendust’ (an alloy of Iron, Silicon, and Aluminum) provides excellent high-frequency characteristics, low core loss, and high saturation flux density, making it suitable for power inductors. ‘High Flux’ cores, typically made from an iron-nickel alloy, are known for their high saturation flux density and low core loss at high DC bias, ideal for applications requiring high energy storage. The combination or selection of these materials in the SF3515L-E20 ensures a versatile core capable of handling various magnetic requirements efficiently.
• Mounting Type: Through Hole
  This specifies that the U/L core is designed for through-hole mounting, a traditional method where component leads are inserted through holes drilled in a printed circuit board (PCB) and then soldered. Through-hole mounting provides strong mechanical bonds, making it suitable for applications where physical robustness and heat dissipation are important, or for larger components like power inductors and transformers.
• Component Type: U/L Core
  This clearly defines the geometric configuration of the magnetic component. U/L cores are comprised of two distinct pieces that fit together to form a closed magnetic loop. This design offers flexibility in winding and assembly, allowing for various coil configurations and gap adjustments to achieve desired inductance values and saturation characteristics.
• Shape Dimensions (mm): 35 15 7.5 20
  These dimensions provide the critical physical measurements of the U/L core in millimeters. While the exact interpretation can vary slightly depending on the manufacturer’s standard, these typically refer to the length, width, height, and possibly the leg width or center leg dimensions. For instance, ’35’ could be the overall length, ’15’ the overall width, ‘7.5’ the height, and ’20’ an internal dimension or leg width. These dimensions are crucial for mechanical integration into an assembly, ensuring proper fit within a housing or on a PCB, and for calculating winding parameters.

Features and Benefits

• Optimized Magnetic Performance: The advanced Si-Fe / Sendust / High Flux core material blend provides superior magnetic properties, including high saturation flux density and low core loss, leading to enhanced efficiency in power conversion applications.
• Robust Through-Hole Mounting: Designed for through-hole assembly, the SF3515L-E20 offers excellent mechanical stability and reliable electrical connections, ensuring long-term durability in demanding industrial and commercial environments.
• Versatile Application Suitability: Its U/L core geometry allows for flexible winding configurations and air gap adjustments, making it highly adaptable for a broad spectrum of inductive and transformer designs.
• High Power Handling Capability: The carefully selected core materials enable the component to manage significant power levels with minimal energy dissipation, making it ideal for high-current and high-frequency applications.
• Reliable KDM Manufacturing: As a product from KDM, this U/L core benefits from stringent quality control and precision manufacturing processes, guaranteeing consistent performance and reliability.

Typical Applications

• Switch-Mode Power Supplies (SMPS): The SF3515L-E20 is frequently employed in the output chokes and main transformers of SMPS designs. Its low core loss and high saturation characteristics are crucial for efficient energy storage and transfer, minimizing heat generation and maximizing power conversion efficiency in AC-DC and DC-DC converters.
• Inductors for EMI/RFI Filtering: Due to its excellent magnetic properties, this U/L core is well-suited for constructing inductors used in electromagnetic interference (EMI) and radio-frequency interference (RFI) filters. These filters are essential in electronic systems to suppress unwanted noise and ensure compliance with regulatory standards, providing clean power to sensitive circuitry.
• Power Factor Correction (PFC) Chokes: In PFC circuits, the SF3515L-E20 can be utilized to build boost inductors that help improve the power factor of electronic loads. This is vital for reducing harmonic distortion, increasing system efficiency, and meeting energy efficiency regulations in applications like LED drivers, server power supplies, and industrial equipment.
• DC-DC Converters: Within various DC-DC converter topologies (e.g., buck, boost, buck-boost), this U/L core serves as the primary inductive element. Its ability to store and release energy efficiently is fundamental to regulating output voltage and current, making it indispensable in automotive electronics, telecommunications, and portable devices.
• Renewable Energy Systems: The core finds application in inverters and converters for solar power and wind energy systems. Its robust design and high power handling capabilities are critical for managing the significant power flows and ensuring reliable operation in grid-tied and off-grid renewable energy installations.

Summary

The KDM SF3515L-E20 U/L Core represents a superior choice for engineers and manufacturers seeking high-performance magnetic components. With its advanced Si-Fe / Sendust / High Flux core material, robust through-hole mounting, and versatile design, it delivers exceptional efficiency and reliability across a wide array of power electronics applications. This premium component is stocked and shipped across India by Cirkit Electro Components, Mumbai, ensuring prompt availability for your critical projects.

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