KSF651-026A Si-Fe Toroid Core 165.00×102.40×31.75 26µ

KSF651-026A is a high-performance Silicon-Iron (Si-Fe) Toroid Core manufactured by KDM, a reputable name in passive components. This magnetic core is a critical building block for various inductive applications, designed to efficiently store magnetic energy and facilitate the conversion of electrical energy. Its toroidal shape inherently offers superior magnetic shielding and reduced electromagnetic interference (EMI) compared to other core geometries, making it an ideal choice for demanding power electronics and filtering applications. The Si-Fe material composition provides a balance of high saturation flux density and relatively low core losses, crucial for optimizing the performance and efficiency of inductors and transformers.

Key Specifications

This KSF651-026A toroid core boasts several key attributes that define its operational characteristics and suitability for specific designs:

• Series: Si-Fe – This indicates the core material is Silicon-Iron, known for its good magnetic properties, including high saturation flux density and moderate core losses, making it suitable for a wide range of power applications.
• Weight (g): 80.300 – The physical weight of the core, important for mechanical design considerations, shipping costs, and overall product weight in the final assembly.
• Core Material: Si-Fe – Reconfirms the Silicon-Iron composition, highlighting its magnetic characteristics that are critical for inductor and transformer performance.
• Mounting Type: Through Hole – While toroids are typically wound directly, this specification implies that the core is designed to be integrated into a PCB or chassis where components are mounted via through-hole techniques, often referring to the leads of the windings passing through holes.
• Component Type: Magnetic Core (Toroid) – Clearly identifies the product as a toroidal magnetic core, emphasizing its closed-loop magnetic path which minimizes flux leakage.
• AL Value (nH/N²): 78 – The inductance factor, representing the inductance per turn squared. This value is crucial for calculating the number of turns required to achieve a desired inductance for a given winding.
• Permeability (µ): 26 – The relative permeability of the core material, indicating how easily a magnetic field can be established within it. A permeability of 26 suggests a material suitable for applications requiring moderate inductance and good high-frequency performance.
• Effective Area Ae (cm²): 9.870 – The effective cross-sectional area of the core, used in magnetic calculations to determine flux density and energy storage capabilities. A larger Ae allows for higher power handling.
• Effective Length le (cm): 41.200 – The effective magnetic path length, also used in magnetic calculations, particularly for determining magnetizing force and inductance.
• Dimensions OD×ID×HT (mm): 165.00×102.40×31.75 – The physical outer diameter (OD), inner diameter (ID), and height (HT) of the core before coating. These dimensions are vital for mechanical fit, winding space, and overall component footprint.
• Effective Volume Ve (cm³): 407.000 – The effective magnetic volume of the core, directly related to its energy storage capacity. A larger Ve generally indicates a higher power handling capability.
• Dimensions After Coating (mm): 166.50×101.00×33.15 – The dimensions of the core after the application of an insulating coating. This is important for ensuring proper clearance and insulation in wound components, as the coating adds a small amount to the overall size.

Features and Benefits

• Optimized Si-Fe Material: The Silicon-Iron composition provides a balanced performance profile, offering high saturation flux density to prevent saturation under load while maintaining relatively low core losses for improved efficiency in power conversion applications.
• Toroidal Geometry for Superior Performance: The closed-loop toroidal shape inherently minimizes flux leakage and external electromagnetic interference (EMI), resulting in more efficient energy transfer and reduced noise in sensitive circuits.
• Precise Inductance Control: With a specified AL value of 78 nH/N² and a permeability of 26, designers can accurately calculate the required number of turns to achieve precise inductance values, simplifying circuit design and optimization.
• Robust Physical Construction: The substantial dimensions and weight indicate a durable core capable of handling significant power levels and mechanical stresses, ensuring long-term reliability in demanding industrial environments.
• Space-Efficient Design: Despite its power handling capabilities, the toroidal form factor allows for compact winding, contributing to smaller and more efficient overall product designs compared to other core types.

Typical Applications

The KSF651-026A Si-Fe Toroid Core is highly versatile and finds application in a wide array of electronic and electrical systems:

• Power Inductors for DC-DC Converters: Its ability to store significant magnetic energy and handle high currents makes it ideal for use as output inductors in various DC-DC converter topologies (buck, boost, buck-boost) found in power supplies for industrial equipment, telecommunications, and automotive systems.
• EMI/RFI Filters: The excellent magnetic shielding and low leakage flux of toroidal cores make them perfect for common-mode and differential-mode chokes in EMI/RFI filters, effectively suppressing unwanted noise in power lines and data communication circuits.
• Power Factor Correction (PFC) Inductors: In AC-DC power supplies, this core can be utilized in PFC circuits to improve power quality by reducing harmonic distortion and ensuring the input current is in phase with the voltage, critical for compliance with efficiency standards.
• Output Chokes for Switched-Mode Power Supplies (SMPS): Essential for smoothing the rectified output current in SMPS, these cores help reduce ripple and ensure a stable DC output voltage, crucial for sensitive electronic loads.
• Energy Storage Inductors: In renewable energy systems such as solar inverters and wind power converters, these cores can be employed in large energy storage inductors that manage power flow and improve system efficiency.

In summary, the KSF651-026A from KDM is a robust and reliable Si-Fe toroid core, offering excellent magnetic properties and mechanical integrity for a wide range of power and filtering applications. This essential passive component is stocked and shipped across India by Cirkit Electro Components, Mumbai, ensuring prompt availability for your design and production needs.

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