SPM5012T-4R7M-LR Inductors, Coils, Chokes

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Fixed inductors are passive electrical components designed to add electrical impedance or inductance to a circuit. Inductors, usually recognized by their cylindrical shape, consist of a coil of wire wrapped around a ferrite core. The most common type of fixed inductor is the air-core inductor, which has no core at all. The decreasing cost, increased performance, and miniaturization of inductors has made them an attractive option for many applications, particularly in the high frequency domain.

The SPM5012T-4R7M-LR is a fixed inductor manufactured by Coilcraft. This particular model is one of the SPM-L Series Inductors, which is composed of ferrite sleeves embedded in an epoxy-filled ferrite core. It consists of three sections of ferrite which have an effective spacing between the fingers or windings. The three fingers are held in place by stainless steel snap rings. This snapping method makes the inductor easy to assemble with minimal loss to the internal magnetic field.

The SPM5012T-4R7M-LR is a high-performance, low-profile inductor with a current rating of 3.8 A and a rated inductance of 4.7 mH. This inductor features low DCR with a maximum value of 0.811 Ohms with 24 uH inductance, and it is capable of operating at frequencies from 100 kHz to 1 GHz. It is also rated for DC voltage up to 50 V.

The SPM5012T-4R7M-LR is well-suited for power supply filtering, RF matching and communications systems applications. Its miniature size of just 12 mm x 12 mm x 6.9 mm makes it perfect for compact and space-constrained implementations. Its low DCR also lends itself to efficiently transferring power with minimal loss. Additionally, its high inductance rating ensures that it can handle high frequencies without compromising performance or reliability.

In practical applications, the SPM5012T-4R7M-LR fixed inductor works by storing energy in a magnetic field in its non-conductive ferrite core. This stored energy is then released as the resistance in a circuit changes, and this affects the current in the circuit. The inductance is generally measured in henries, and the value is determined by the number of turns on the coil and the type of core material used.

The SPM5012T-4R7M-LR inductor is a great example of how modern technology is enabling the development of more efficient and reliable electronic components. Its small size, high current rating, and low DCR make it a great choice for many different applications. Its versatility makes it a viable option for both audio and power supply filtering and for RF and communications systems.

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