SRP7028A-1R0M Inductors, Coils, Chokes

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Inductors are commonplace and essential components in power supply circuits, motor control, energy harvesting and communications, often times in the form of fixed inductors. The SRP7028A-1R0M inductor is a miniature, surface-mount power inductor designed for a wide range of applications and is part of Sumida’s the SRP Automotive series of inductors. Its size and ratings make it particularly suitable for space-constrained automotive and industrial settings.

The SRP7028A-1R0M is constructed from resin and leadless terminals to suit its miniature size, and it is intended for automatic assembly due to its leadless construction. The inductor has an inductance rating of 1μH ±30% at 100kHz, 1.0V. It has an SRF of 35.4MHz, its rated current is 1.3A and its DCR rating – the resistance of windings inside the inductor – is 0.068 ohms. The SRP7028A-1R0M has a maximum operating temperature of 150°C.

The most common application of the SRP7028A-1R0M is in power inductor circuits, as the inductance rating of 1μH, and the rated current of 1.3A make it suitable for a variety of applications. The SRP7028A-1R0M is most often used in power supplies for light-duty applications such as cell phone chargers and laptops due to its low profile and small size. It is also suitable for motor control, energy harvesting, and communications applications.

The working principle of the SRP7028A-1R0M inductor is based on Faraday’s Law. This law states that an electromotive force, or EMF, is generated in a circuit whenever there is a change in magnetic flux. This EMF is equal to the rate of change of the magnetic flux of the circuit. The SRP7028A-1R0M applies this principle by focusing the magnetic flux within its winding, or core, in order to generate an EMF, thereby increasing its inductance.

The SRP7028A-1R0M is constructed with a ferrite core, a winding, and two terminals. As a current passes through the core, it creates a magnetic field which is concentrated within the winding, generating an EMF. The greater the amount of current that passes through the core, the greater the EMF will be, and the greater the inductance. This process of current flowing through the core to create a magnetic field and thus generate EMF increases the inductance of the inductor, thus allowing it to be used in power inductor circuits.

In summary, the SRP7028A-1R0M is a miniature, surface-mount power inductor designed for a wide range of applications in automotive and industrial settings. It is constructed from resin and leadless terminals and has an inductance rating of 1μH ±30% at 100kHz, 1.0V with a SRF of 35.4MHz and its rated current is 1.3A and its DCR rating is 0.068 ohms. Its most common application is in power inductor circuits for light-duty applications such as cell phone chargers and laptops due to its low profile and small size. The working principle of the SRP7028A-1R0M inductor is based on Faraday’s Law, with current passing through its ferrite core creating a magnetic field which is concentrated within its winding in order to generate an EMF, thereby increasing its inductance.

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