SRN5040-4R7M Inductors, Coils, Chokes

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Fixed inductors are electrical and electronic components designed to provide a specific amount of inductance. The SRN5040-4R7M is a fixed inductor by Murata Manufacturing, a leading manufacturer of parts for the electronics industry. This component is a non-polarized surface-mount type and is used in telephone applications. The following provides a detailed description of the application field and working principle of the SRN5040-4R7M.

Application Field

The SRN5040-4R7M can be used in various telephone applications, such as modular telephone cords, cellular phone chargers, cordless telephone cords, and other voice products. It is also often used in electronic toys, switch mode power supplies, cellular phones, and modem applications. This inductor has an excellent power rating and is designed to reduce high shelf temperatures at start-up.

Working Principle

The SRN5040-4R7M works by creating a self-induced magnetic field around a coil of wire when current is passed through it. This induces a voltage opposite to the current direction, creating a frequency-dependent resistance, also known as inductance. By using ferromagnetic material such as ferrite, an inductor can increase magnetic flux, resulting in greater inductance. This property is what makes it ideal for telephone applications.

The SRN5040-4R7M employs a typical single-layer coil structure, characterized by a single row of windings and a single core that is enclosed in a metal housing. Its coil is made from a high-temperature alloy and has an internal capacitor to stabilize readings. The reduction of the inductance with an increase in frequency is very important for this special telephone application.

Advantages

The SRN5040-4R7M offers several advantages compared to other fixed inductors. Its high-power and high-frequency performance are among its best features. Additionally, its low profile of just 0.37” (9.4mm) makes it ideal for use in space-constrained applications. It also has good shock resistance and long-term stability, making it reliable and durable.

The SRN5040-4R7M also has a high self-resonance frequency of 6GHz, making it capable of carrying higher frequency signals with minimal distortion. It also has low current and high maximum allowable current ratings, ensuring customers can use this component as a sustainable power source.

Conclusion

The Murata SRN5040-4R7M is a fixed inductor used in telephone applications. It can be used in a variety of applications, such as cellular telephones, cordless telephones, electronic toys, and switch mode power supplies. The SRN5040-4R7M uses a single-layer coil structure that offers excellent high-power and high-frequency performance. Its small size, high self-resonance frequency, and good shock resistance make it a desirable choice for telephone applications.

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