PM43-8R2M

DC Resistance (DCR):	147 mOhm
Height - Seated (Max):	0.138" (3.50mm)
Size / Dimension:	0.177" L x 0.157" W (4.50mm x 4.00mm)
Supplier Device Package:	--
Package / Case:	Nonstandard
Mounting Type:	Surface Mount
Inductance Frequency - Test:	7.96MHz
Operating Temperature:	-40°C ~ 100°C
Ratings:	--
Frequency - Self Resonant:	35MHz
Q @ Freq:	--
Series:	PM43
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	840mA
Tolerance:	±20%
Inductance:	8.2µH
Material - Core:	Ferrite
Type:	Wirewound
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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Introduction

Inductors, also known as coils, chokes, or reactors, are used in electrical circuits to store energy in the form of magnetic fields. The PM43-8R2M is an example of a fixed inductor. This type of inductor is built with two or more turns of conducted wire, or windings, wound onto a core that can be composed of air, ceramic, powdered iron, ferrite, or other materials. Fixed inductors are the most common type because they are more stable than adjustable units, which can be used to alter the value of the inductance.

PM43-8R2M Application Field and Working Principle

The PM43-8R2M is a high-performance, low-cost fixed inductor designed for a wide range of applications. It is typically used in switching power supplies, power filters, inverters, and drive circuits. This inductor is constructed with a core made from ferrite and two wire windings of 0.25mm diameter copper wire.The PM43-8R2M has an inductance value of 0.68μH and a resistance of 0.1Ω at a frequency of 100kHz. This makes it suitable for applications requiring low-resistance and high current-handling. Its other features include low DC resistance, low temperature rise, high reliability, and excellent heat dissipation.The working principle of the PM43-8R2M is based on Lenz’s law, which states that when a magnetic field is generated around a coil or conductor, a current will flow through the wire. The amount of current depends on the number of turns of wire, the core material, and the frequency of the applied voltage. The more turns of wire, the higher the current will be. The PM43-8R2M has two turns of wire wound onto a ferrite core, so it can handle relatively high current levels without heating up.The PM43-8R2M can also be used in power supplies to reduce electromagnetic interference (EMI). The inductor acts as a filter, removing high-frequency noise and harmonics from the circuit. This helps reduce the amount of EMI that could otherwise be emitted and can also improve power supply efficiency.

Conclusion

The PM43-8R2M is a high-performance, low-cost fixed inductor. It is suitable for applications requiring low-resistance and high current-handling. Its core is made from ferrite and it has two wire windings of 0.25mm diameter copper wire. It is typically used in switching power supplies, power filters, inverters, and drive circuits. The PM43-8R2M can also be used to reduce EMI in power supplies. The working principle is based on Lenz’s law and it will generate current when a magnetic field is applied.

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