4445-20J

DC Resistance (DCR):	150 mOhm Max
Height - Seated (Max):	0.230" (5.84mm)
Size / Dimension:	0.210" L x 0.110" W (5.33mm x 2.79mm)
Supplier Device Package:	--
Package / Case:	Radial
Mounting Type:	Through Hole
Inductance Frequency - Test:	50MHz
Operating Temperature:	-55°C ~ 125°C
Ratings:	--
Frequency - Self Resonant:	240MHz
Q @ Freq:	80 @ 50MHz
Series:	4445
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	1.15A
Tolerance:	±5%
Inductance:	390nH
Material - Core:	Iron
Type:	Toroidal
Part Status:	Active
Packaging:	Bulk

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.Fixed InductorsThe 4445-20J application field and working principle describe how this electrotechnical component is used in various projects. It is a part of the fixed inductor family, which is extensively used in many power networks. Fixed inductors are of paramount importance in numerous systems as they are both reliable and versatile. This article presents a brief overview of the fixed inductors application field and working principle, as exemplified by the 4445-20J. Fixed inductors, also known as inductors or coil inductors, are electrical components that are used to resist the change of current. They have two terminals where current flows in and out of the component and are typically made of coils of wire that are wound around a solid core. The component is often represented by a symbol that looks like two horizontal lines. Depending on the type of inductor, it can have one, two, or three terminals. These components can usually be found in both low-power and high-power projects, and they are primarily used to filter frequencies, limit current, and prevent signal loss.Since fixed inductors oppose any change in current flow, it is important to understand their working principle. Inside the component, the electrical current flows through its core, which is usually made of metal, silicon, or ferrite. This core has a certain magnetic permeability that allows it to store the current’s energy in an electromagnetic field, while also providing resistance to the flow of current. The core’s magnetic permeability is also responsible for the component’s inductance, which is the measure of its stored energy. As the current passes through the component, some of it will be stored while the rest will be allowed to continue flowing.As one of the most important families of electrical components, fixed inductors such as the 4445-20J can be found in many areas. In simple circuits, they can be used to limit current or provide electrical source stabilization. In more complex circuits, fixed inductors are used as transducers, as supplies for voltage regulation, and as filters for high-frequency signals. Their versatility makes them invaluable components in a variety of electrical systems, such as non-inverting amplifiers, wireless communication systems, and medical devices. Fixed inductors are also used in switching DC-to-DC converters. They prevent incorrect turns ratio interpolation during turns transition due to their high inductance and the associated low current flow resistance. This makes them the go-to choice for motor control circuits and linear voltage regulators, where they provide a smooth voltage easing during transitions. Finally, the application of fixed inductors can be seen in automotive subsystems, such as fuel injection systems, which use the components to control the precise timing of fuel injection. On aircraft, fixed inductors are used in the navigation and guidance systems, as well as in internal combustion and electric motors. In fact, they are slowly becoming an indispensable component in all types of transportation systems as they offer a reliable and versatile way to ensure current control. The 4445-20J is a perfect example of the range of applications for fixed inductors. It is made of a solid iron core with a lead-free finish and is compatible with many types of substrates. It features a low DC resistance, high accuracy in its inductance values, and a low temperature coefficient, making it a reliable and efficient choice.In conclusion, fixed inductors, such as the 4445-20J, are widely used in many electrical projects due to their dependability and versatility. Inside the component, the electrical energy is stored in a magnetic field, allowing for current resistance and smooth transitions. Fixed inductors can be used to limit current, prevent signal loss, and provide voltage regulation or source stabilization. They are used in circuits for non-inverting amplifiers, wireless communication systems, and automotive subsystems. They are also becoming increasingly important components in transportation systems and medical devices.

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