HM28-24012LF

Voltage Rating - AC:	250V
Package / Case:	Vertical, 4 PC Pin
Height (Max):	0.945" (24.00mm)
Size / Dimension:	1.024" L x 1.024" W (26.00mm x 26.00mm)
Mounting Type:	Through Hole
Features:	--
Approvals:	--
Ratings:	--
Operating Temperature:	--
Series:	HM28
Voltage Rating - DC:	--
DC Resistance (DCR) (Max):	1.6 Ohm
Current Rating (Max):	600mA
Inductance @ Frequency:	24mH @ 1kHz
Number of Lines:	2
Filter Type:	--
Part Status:	Discontinued at Digi-Key
Packaging:	Bulk

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Common Mode Chokes

Common Mode Chokes, also known as CM chokes, are components used to reduce the amount of electromagnetic interference (EMI) generated by power supplies. They are used in power electronics, audio systems, and other electrical appliances. The HM28-24012LF is one such type of common mode choke.

Application field

The HM28-24012LF is designed to reduce EMI emitted by power supplies, resulting in improved system performance and reliability. It is widely used in ac-dc and dc-dc power supplies, such as the widely used and popular Laptop, PC, and PCLEX supplies. This CM filter has a high impedance across its pins, allowing it to effectively filter out EMI and unwanted electromagnetic noise.

Working Principles

Common Mode Chokes are composed of two or more conductors, typically wound around a magnetic core or ferrite material. These conductors are in the same direction and phase, so the magnetic fields of each conductor interact with one another to form a single, larger magnetic field. This magnetic field then acts to filter out electromagnetic interference from other sources.The HM28-24012LF uses this principle to filter EMI and unwanted noise. Its conducting coils are wound in a very precise manner, with the coils wrapped around a ferrite core material. This creates two magnetic fields – one across each conductor – that interact with one another to cancel out each other\'s magnetic field. In doing this, the HM28-24012LF is able to effectively filter out interference and EMI.Additionally, the HM28-24012LF also features an integrated filter capacitor, which helps to further reduce unwanted EMI emissions from the power supply. The filter capacitor utilizes a ceramic material to block out high frequency noise signals, thus providing improved system performance and reliability.

Conclusion

The HM28-24012LF is a type of common mode choke designed to reduce the amount of electromagnetic interference (EMI) emitted by power supplies. It can be used in both ac-dc and dc-dc power supplies, such as laptops, PCs, and PCLEX supplies. The HM28-24012LF is composed of two or more conductors that are wound in a very precise manner and that interact with one another to form a single, larger magnetic field, which serves to filter out EMI and unwanted electromagnetic noise. The HM28-24012LF also features an integrated filter capacitor to further reduce EMI emissions.

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