DC Resistance (DCR):	20 mOhm Max
Height - Seated (Max):	0.157" (4.00mm)
Size / Dimension:	0.268" L x 0.268" W (6.80mm x 6.80mm)
Supplier Device Package:	--
Package / Case:	Nonstandard
Mounting Type:	Surface Mount
Inductance Frequency - Test:	100kHz
Operating Temperature:	-40°C ~ 125°C
Ratings:	--
Frequency - Self Resonant:	75.9MHz
Q @ Freq:	9.8 @ 7.96MHz
Series:	PM638S
Shielding:	Shielded
Current - Saturation:	3.6A
Current Rating:	3.5A
Tolerance:	±30%
Inductance:	3.3µH
Material - Core:	Ferrite
Type:	Wirewound
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Fixed Inductors

Inductors are passive electrical components used to store energy in the form of a magnetic field in a coil. A fixed inductor is a component whose inductance is fixed, which usually refers to an air-core type. Fixed inductors are widely used in power supplies,telecommunications, automotive electronics, aerospace, and military electronics applications.One example of a fixed inductor with multiple application fields and a unique working principle is the PM638S-3R3-RC. PM638S-3R3-RC has a miniature, low profile package, which makes it suitable for use in space-constrained, high-density circuits, such as automotive electronics. Its tight temperature and inductance tolerances, high current handling capabilities, and inductance values ranging from 1.2 μH to 47 μH make this component suitable in various high-frequency applications, including power converters, DC/DC converters, AC/DC converters, battery charging circuits, high-frequency power supplies, and RF applications.The PM638S-3R3-RC is an axial lead, non-polarized, radial-lead ferrite fixed inductor made of a mixture of several different ceramic compounds. It consists of a high-temperature, low-loss, ferrite core and has a low DC resistance, making it suitable for use in high-frequency circuits.The PM638S-3R3-RC’s working principle is based on Fleming’s left-hand rule. When a current-carrying conductor is placed in a magnetic field, such as the magnetic field produced by the ferrite core of the PM638S-3R3-RC, the conductor experiences a force, or otherwise known as back-EMF, which opposes the applied current. The magnitude of the back-EMF is proportional to the rate of change of the current that is flowing through the conductor, thus producing an opposing voltage, known as inductance. The total resistance of the inductor is calculated by adding the DC resistance of the winding to the total inductance, providing the total impedance of the component.The PM638S-3R3-RC, as a fixed inductor, provides high inductance with low DC resistance, making it suitable for use in power supplies, telecommunications, and AC/DC converters. Its miniature, low-profile package makes it an ideal choice for space-constrained, high-density circuits such as automotive electronics, making it an effective, economical solution for various application fields. Overall, the PM638S-3R3-RC is an excellent fixed inductor, due to its multitude of application fields, tight temperature and inductance tolerances, high current handling capabilities, and miniature, space-saving design. Its working principle is based on Fleming’s left-hand rule, and its inductance is determined by the rate of change of the current experienced by the conductor, thus providing a signal voltage that opposes the applied current. Its DC resistance is low and total inductance is high, making it suitable for use in a wide range of applications, such as power supplies, telecommunications, AC/DC converters, and automotive electronics.

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