KM300-125A MPP Toroid Core 77.80×49.20×12.70 125µ

KM300-125A is a high-performance MPP (Molypermalloy Powder) Toroid Core manufactured by KDM, a reputable name in passive components. This magnetic core is specifically designed to provide excellent energy storage capabilities and low core losses, making it ideal for a wide range of power electronics applications. Toroid cores, characterized by their doughnut shape, offer superior magnetic shielding and efficient flux containment compared to other core geometries. The KM300-125A, with its precise dimensions and specified permeability, is engineered to meet the demanding requirements of modern electronic circuits, ensuring stable inductance and reliable operation in critical applications such as power supplies, inductors, and filters.

Key Specifications

This KDM MPP Toroid Core boasts several critical specifications that define its performance and suitability for various applications:

• Series: MPP – Indicates that the core belongs to the Molypermalloy Powder series, known for its high saturation flux density, low core losses, and excellent temperature stability, making it suitable for high-frequency applications.
• Weight (g): 17.990 – The physical weight of the core, an important consideration for mechanical design, assembly, and overall product weight, especially in portable or weight-sensitive applications.
• Core Material: MPP – Molypermalloy Powder is an alloy of nickel, iron, and molybdenum. It offers a unique combination of high resistivity, low eddy current losses, and a distributed air gap, which prevents saturation and allows for higher DC bias currents without significant inductance drop.
• Mounting Type: Through Hole – While the core itself is typically mounted directly onto a PCB or within an enclosure, this attribute often refers to how components wound around the core (like inductors) are mounted, implying robust physical integration.
• Component Type: Magnetic Core (Toroid) – Clearly identifies the product as a toroidal magnetic core, emphasizing its closed-loop magnetic path which minimizes leakage flux and external electromagnetic interference.
• AL Value (nH/N²): 142 – The inductance factor, representing the inductance per turn squared. An AL value of 142 nH/N² allows engineers to precisely calculate the required number of turns to achieve a specific inductance value for their coil.
• Permeability (µ): 125 – The relative permeability of the core material, indicating how easily a magnetic field can be established within it. A permeability of 125 signifies a good balance between high inductance and resistance to saturation, suitable for energy storage applications.
• Effective Area Ae (cm²): 1.770 – The cross-sectional area of the core through which magnetic flux passes. A larger effective area generally allows for higher flux handling capabilities and can reduce the number of turns required for a given inductance.
• Effective Length le (cm): 20.000 – The average length of the magnetic path within the core. This parameter, along with Ae, is crucial for calculating inductance and understanding the magnetic circuit.
• Dimensions OD×ID×HT (mm): 77.80×49.20×12.70 – The precise outer diameter (OD), inner diameter (ID), and height (HT) of the core. These dimensions are critical for mechanical fit, winding space, and overall component footprint in a design.
• Effective Volume Ve (cm³): 34.700 – The volume of the core material, which is directly related to its energy storage capacity and power handling capability.
• Dimensions After Coating (mm): 78.90×48.20×13.84 – These dimensions account for the protective coating applied to the core, which provides electrical insulation and mechanical protection. It’s essential for designers to consider these slightly larger dimensions for clearance and winding calculations.

Features and Benefits

• Low Core Losses: The MPP material exhibits low hysteresis and eddy current losses, especially at higher frequencies, leading to improved efficiency in power conversion applications and reduced heat generation.
• High Saturation Flux Density: MPP cores can handle higher DC bias currents without saturating, allowing for smaller inductor sizes and higher power density in designs.
• Excellent Temperature Stability: The permeability of MPP cores remains relatively stable over a wide range of operating temperatures, ensuring consistent performance in varying environmental conditions.
• Distributed Air Gap: The inherent distributed air gap within the MPP material prevents localized saturation, enhancing the core’s ability to store energy and handle high ripple currents.
• Compact Toroidal Form Factor: The toroidal shape provides a self-shielding effect, minimizing electromagnetic interference (EMI) and reducing the need for external shielding, saving space and cost.

Typical Applications

The KM300-125A MPP Toroid Core is highly versatile and finds application in numerous electronic systems:

• Power Factor Correction (PFC) Chokes: Its low core losses and high saturation characteristics make it ideal for PFC inductors in power supplies, improving efficiency and meeting regulatory standards.
• DC-DC Converters: Used as energy storage inductors in buck, boost, and buck-boost converters, providing stable inductance and efficient power transfer in various voltage conversion stages.
• Output Inductors/Filters: Employed in the output stages of switched-mode power supplies (SMPS) to smooth ripple current and voltage, ensuring clean power delivery to sensitive loads.
• EMI/RFI Filters: The excellent magnetic properties and toroidal shape contribute to effective common-mode and differential-mode filtering, suppressing unwanted noise in electronic circuits.
• Energy Storage Inductors: Suitable for applications requiring efficient energy storage, such as inverters, UPS systems, and renewable energy systems where high reliability and performance are paramount.

In summary, the KDM KM300-125A MPP Toroid Core is a robust and efficient magnetic component designed for demanding power electronics applications. Its superior material properties, precise dimensions, and optimized performance characteristics make it an excellent choice for engineers seeking reliable and high-performance solutions. This component is stocked and shipped across India by Cirkit Electro Components, Mumbai.

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