VLS3015T-4R7MR99 Inductors, Coils, Chokes

DC Resistance (DCR):	136 mOhm Max
Height - Seated (Max):	0.059" (1.50mm)
Size / Dimension:	0.118" L x 0.118" W (3.00mm x 3.00mm)
Supplier Device Package:	--
Package / Case:	Nonstandard
Mounting Type:	Surface Mount
Inductance Frequency - Test:	1MHz
Operating Temperature:	-40°C ~ 105°C
Ratings:	--
Frequency - Self Resonant:	--
Q @ Freq:	--
Series:	VLS
Shielding:	Shielded
Current - Saturation:	990mA
Current Rating:	990mA
Tolerance:	±20%
Inductance:	4.7µH
Material - Core:	--
Type:	Wirewound
Part Status:	Not For New Designs
Packaging:	Tape & Reel (TR)

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Fixed InductorsInductors are passive two-terminal electrical components used in electronics to store energy in a magnetic field. In fixed inductors, the value of inductance cannot be changed or adjusted; hence they are also known as “fixed value inductors.” Fixed inductors are primarily used in circuits with high frequency components, such as filters, oscillators, and tuned amplifiers.Among fixed inductors is the VLS3015T-4R7MR99. This particular fixed inductor is used in high-speed, low-jitter, low-noise applications. It is designed with high resonance frequency points, superior current-handling capabilities, and low DC resistance, making it the optimal choice for components of high-speed circuits.ApplicationsThe VLS3015T-4R7MR99 is typically used in power electronics, frequency control circuits, signal processing, and telecommunication devices. In power electronics, this fixed inductor is used in voltage converter circuits and power inverters, providing an efficient way of controlling and regulating significant amounts of power. Furthermore, its design allows it to withstand high currents, making it suitable for use in high-power motor drives.The VLS3015T-4R7MR99 is also suitable for filtering and matching applications in communications electronics due to its superb performance in low-jitter, low-noise, and high-frequency circuits. With its low resistance design, it provides superior heat dissipation capability, making it suitable for use in RF transceivers and LNAs (Low Noise Amplifiers).Working PrincipleA fixed inductor generates a magnetic field inside the core when an electrical current flows through it. This magnetic field stores the energy from the passing current in the form of a magnetic flux. According to Faraday’s law of induction, as the current varies, the magnetic field in the core induces a voltage in the inductor’s windings in the opposite direction to the current flow. Thus, an opposing voltage is generated in the winding to maintain the current flow through the inductor, which is referred to as the “back-EMF.”The VLS3015T-4R7MR99 is designed to provide high resonance frequency points. This is done using internal winding techniques and by using material for its core that offers low reluctance at the operating frequencies. Additionally, it features improved current-handling capabilities and low DC resistance due to its low DC resistance winding structure.ConclusionFixed inductors are an important part of high-frequency circuits and are used extensively in power electronics, RF, and communication electronics applications. The VLS3015T-4R7MR99 is an optimal choice of fixed inductors for such applications due to its design and robust material. It is designed with high resonance frequency points, superior current-handling capabilities, and low DC resistance, making it suitable for use in high speed circuits, voltage converters, power inverters, and RF transceivers.

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