SP1008R-122H

Fixed Inductors

An inductor is an electrical component used to create a localized magnetic field in the circuit. Its main application is to convert electrical energy to magnetic energy when a current is passed through it. SP1008R-122H is one of the most popular models of fixed inductors used in many consumer electronic products.

Physical Characteristics

The SP1008R-122H is a rectangular, dual-winding, surface-mounted fixed inductor. It has a lead-free alloy-coated copper core encapsulated in a flame-retardant casing with a terminal head. Overall, its dimensions are 10.2mm (width) x 8.8mm (height) x 4.6mm (length) and it weighs 0.5g.

Application Field

The main application field of SP1008R-122H is power supply circuits, in particular for low level power line filtering, line regulation for battery-powered devices and high frequency SMPS. The maximum rated current is 1.2 Amps and it can be used in temperature range between -40°C and 85°C.

Common use cases include power supplies in telecommunications equipment, computers, inverters, DC-DC converters, switch mode power supplies, and voltage regulators. It has also been used for mobile phone power supply and signal filtering, instrumentation, automotive electronics, and other high-frequency applications.

Working Principle

The SP1008R-122H is a closed magnetic core inductor, which works by creating an electromagnetic field around a copper core. When a current is passed through the windings, it interacts with the core’s magnetic field, creating an opposing magnetic force that causes the inductor to draw power from the circuit. This is why it is used for filtering and regulation in power supply circuits.

The core material of the inductor influences the amount of inductance, or opposition to current flow, it creates. The type of casing and its size also affects this parameter. In the case of the SP1008R-122H, the casing is made of a flame-retardant material that helps dissipate heat, prolonging its life. The internal windings are also coated in an alloy for additional protection.

Conclusion

The SP1008R-122H is a high-performance fixed inductor with a wide range of applications in the power supply area. It features a lead-free copper core, an alloy-coated winding and a flame-retardant casing. With a maximum current rating of 1.2 Amps, it is suitable for operations in the temperature range between -40°C and 85°C.