HM28-42055LF

Voltage Rating - AC:	250V
Package / Case:	Vertical, 4 PC Pin
Height (Max):	1.693" (43.00mm)
Size / Dimension:	1.437" L x 0.984" W (36.50mm x 25.00mm)
Mounting Type:	Through Hole
Features:	--
Approvals:	--
Ratings:	--
Operating Temperature:	--
Series:	HM28
Voltage Rating - DC:	--
DC Resistance (DCR) (Max):	150 mOhm
Current Rating (Max):	2.7A
Inductance @ Frequency:	10mH @ 1kHz
Number of Lines:	2
Filter Type:	--
Part Status:	Discontinued at Digi-Key
Packaging:	Bulk

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Introduction

Common Mode Chokes, abbreviated as CMC, are inductors primarily used to block or reduce common mode noise in electronic circuitries. They are primarily constructed using magnetic materials like ferrite, powdered iron, or other types of inductive material. Common Mode chokes are often used in telecommunication networks, such as DSL (digital subscriber line) and line side applications.The HM28-42055LF is one of the most commonly used CMC\'s. This device features a high ESR and extremely low DCR, which makes it ideal for many high-frequency and/or harsh-environment applications. It also features a low temperature coefficient, which ensures long life and superior performance in various environments.

HM28-42055LF Application Field

HM28-42055LF is most suitable for a wide array of applications, from low-frequency/high-frequency to harsh environments. It can be used in telecommunication networks, computer monitor systems, EMI filter circuits, LAN server systems, digital camera systems, video game systems, and much more. This CMC is suitable for various types of electrical appliances in the automotive, healthcare, industrial, and telecommunications sector. It can also be used in audio and video applications, such as audio/video receivers and DVD players. In addition, it is also suitable for high power supplies that use DC/DC converter circuits, lithium-ion battery charger circuits, hydroelectric power systems, UPS systems, and the automotive power systems.

HM28-42055LF Working Principle

The HM28-42055LF works by providing an inductive filter to reduce the amount of noise in an electronic circuit. The choke operates by blocking the passage of high-frequency noise, preventing it from entering the circuit and causing interference. The choke works by creating a magnetic field around the choke that dissipates the noise waveforms instead of allowing them to reach the circuit. The most important component of the choke is the inductor, which is basically made up of a coil of wire. The inductor works by creating an AC voltage drop across itself, thus preventing unwanted AC voltage from entering the circuit board and causing interference. The new voltage created by the induced voltage itself is then dissipated as heat instead.The HM28-42055LF also offers many other features, such as high current-handling capability, low-voltage mains filtering, and low leakage magnetism. It is also made of high-quality material with a long useful life and provides excellent thermal stability and reliability. Its wide operating voltage ranges make it a good choice for various types of applications.

Conclusion

Common Mode Chokes are used to reduce noise in electronic circuits and the HM28-42055LF is one of the most commonly used CMC’s. It is used in various applications such as telecommunication networks, computer monitor systems, EMI filter circuits, LAN server systems, digital camera systems, video game systems, audio/video applications, and much more. The HM28-42055LF works by providing an inductive filter to reduce the amount of noise. It also offers many features such as high current-handling capability, low-voltage mains filtering, and low leakage magnetism. Thanks to its versatility and usefulness, the HM28-42055LF is one of the go-to CMC\'s for many applications.

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