IM04STR47J

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Fixed inductors, also known as choke coils, are electronic components made of laminated steel, ferrite, air, or ferrite core materials, and wound with windings. IM04STR47J is one type of fixed inductor. Its key features and applications can be summarized in the following.

Key Features:

• Low DC resistance
• High rated current
• High quality factor
• High saturation current
• Large current capacity

Specifications:

• Inductance range: 0.47uH ±20%
• DC resistance range: 0.18Ω Max
• Rated current: 800mA ±20%
• Saturation current: 1.23A Max
• Operating temperature range: -40°C to +85°C
• Knob dimension: 4.85mm x 3.7mm

Application Field:

IM04STR47J is mainly used in power conversion switching power supply, such as the buck, boost, or SEPIC industry. It is also used in impedance matching to improve the performance of radio frequency devices. IM04STR47J is also applied in current-limiting, high-pass and low-pass filter circuits, continuous wave rectifiers, flyback transformers and staircase wave rectifiers. Moreover, IM04STR47J can be used as an energy storage inductor in high-frequency circuits.

Working Principle:

An inductor is a passive device that resists electrical current and stores energy in the form of a magnetic field when electricity passes through it. It is made up of copper or aluminum wires wound around a core. The core material can be ferrite, air, or that made with laminated steel and ferrite. When an alternating current I is applied to it, the latter starts to increase in the winding and generates a magnetic field. According to Faraday\'s law of electromagnetic induction, the induced electromotive force (EMF) can be determined by the E=-L dI/dt equation. If the current is constant, then the EMF is proportional to the inductance. Therefore, when current passes through the inductor, the magnetic field is generated, thereby producing a self-induced EMF that opposes the flow of current. This phenomenon is called the inductive effect, also known as the inductance principle.

IM04STR47J is a common type of fixed inductor which works in accordance with the inductance principle. It is made up of a winding around a ferrite core material, determining its inductance value and rated current. With its high quality factor, low DC resistance, large current capacity, and high saturation current, it is widely used in various fields, such as power switching, radio frequency matching, and wave rectifier.

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