70F391AF

DC Resistance (DCR):	617 Ohm Max
Height - Seated (Max):	--
Size / Dimension:	0.600" Dia x 0.880" L (15.24mm x 22.35mm)
Supplier Device Package:	Axial
Package / Case:	Axial
Mounting Type:	Through Hole
Inductance Frequency - Test:	25kHz
Operating Temperature:	-55°C ~ 105°C
Ratings:	--
Frequency - Self Resonant:	56kHz
Q @ Freq:	54 @ 25kHz
Series:	70F
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	33mA
Tolerance:	±5%
Inductance:	390mH
Material - Core:	Ferrite
Type:	Wirewound
Part Status:	Obsolete
Packaging:	Bulk

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Fixed InductorsFixed inductors refer to a kind of passive component, which is mainly used in filtering, buffering, resonating and isolating, coupling and voltage dividing, etc., to regulate and filter current and voltage changes. Apart from common inductors, there are various types of inductors, such as transformers, ferrites, chokes, etc. Among them, 70F391AF is of great importance.70F391AF, classified as toroidal inductors, is an inductor that functions as a passive component with a variety of electrical specifications. It is usually realized with the windings of enameled wire and ferrite core, and its construction consists of a hollow rectangular or cylindrical form with a rectangular cross section or round. According to the calculation formula, its inductance is determined by the number of turns of the wire on the core, the form and size of the core, the arrangement and geographical features of the windings, as well as the magnetic properties of the core material.In terms of its application field, 70F391AF is highly versatile and can be used for suppressing electromagnetic interference (EMI) in a variety of electronic devices, such as laptop computers, tablets, and mobile phones etc. It acts as an electronic filter which removes noise or static electricity which may interfere with the operation of the device. In addition, 70F391AF is also extensively used in home appliances whose motors generates excessive noise. Moreover, 70F391AF is largely used for impedance matching, DC blocking or AC coupling, transformer, voltage converter, boost/flyback transformer, etc.As for the working principle, 70F391AF’s basic working principle is same as other inductors, which is based on the magnetic field generated by the current flowing through the core. The core winding is the conductor where current flows. It combines electrons in the form of a current that creates a magnetic field around it. That is to say, the changing current through the inductor generates an induced electromotive force, which can oppose the change of current. This is what makes the inductor functioning in terms of filtering, buffering, resonating and isolating, coupling and voltage dividing, etc. In addition, the toroidal shape enables high inductance values in a small package.From the above, it can be concluded that 70F391AF inductors play an essential role in today’s electronic devices. Due to its distinctive features such as high current-carrying capacity, low loss characteristics and low cost, it has become popular in various sectors. After all, these inductors are essential in resistance and regulation of voltage and current flowing through them, which in turn provides a good platform for more electrical devices to perform their jobs accordingly.

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