SRP3012TA-4R7M

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Fixed inductors, known as "choke coils," are components used in electrical circuitry for storing energy in the form of an electromagnetic field. The SRP3012TA-4R7M is a fixed inductor, designed to meet the demands of a wide variety of applications. This article provides an overview of the SRP3012TA-4R7M’s application field and working principle.

The SRP3012TA-4R7M is a surface mount, fixed inductor with flat wire wound coils. It is constructed with an outer shell of molded plastic. The parts of the inductor that generate the electromagnetic field are the coils winding around a magnetic core. The pole pieces of the core consist of alternating soft and hard magnetic materials, which radiate a magnetic field when electrical current is applied.

The SRP3012TA-4R7M is primarily used in high current, low frequency filtering applications, such as in power supplies and power inverters. It is designed with tight tolerance winding to reduce the variation in inductance, and its low DC resistance ensures low inrush current. The SRP3012TA-4R7M is highly effective in noise filtering applications, and it is also suitable for use in high current coil inductance applications.

The SRP3012TA-4R7M is also quite reliable, with a temperature coefficient of approximately ±50ppm/°C after reflow soldering. The operating temperature range of this inductor is from -40°C to +85°C. The inductor is RoHS compliant, and has an inductance tolerance of ±20%.

The working principle of the SRP3012TA-4R7M is based on Lenz\'s law. This law states that if a voltage is applied to the winding of a coil, a magnetic field is generated in the opposite direction to the applied voltage. This phenomenon is called self-induction or inductive reactance. The SRP3012TA-4R7M works by creating an inductive reactance, which limits the amount of current that can flow through the device. The amount of inductance is related to the physical parameters of the winding, such as diameter of the wire, number of turns and the size of the core.

In conclusion, the SRP3012TA-4R7M is a fixed inductor with a wide variety of applications. It is designed with tight tolerance winding to reduce the variation in inductance, and it is also suitable for use in high current coil inductance applications. This inductor operates based on Lenz\'s law, which states that an applied voltage generates an opposing magnetic field, thus limiting the amount of current that can flow through the device. This makes the SRP3012TA-4R7M an ideal choice for high current, low frequency filtering applications.

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