DR74-330-R Inductors, Coils, Chokes

DC Resistance (DCR):	143 mOhm
Height - Seated (Max):	0.171" (4.35mm)
Size / Dimension:	0.299" L x 0.299" W (7.60mm x 7.60mm)
Supplier Device Package:	--
Package / Case:	Nonstandard
Mounting Type:	Surface Mount
Inductance Frequency - Test:	100kHz
Operating Temperature:	-40°C ~ 125°C
Ratings:	--
Frequency - Self Resonant:	--
Q @ Freq:	--
Series:	DR
Shielding:	Shielded
Current - Saturation:	1.73A
Current Rating:	1.41A
Tolerance:	±20%
Inductance:	33µH
Material - Core:	Ferrite
Type:	Wirewound
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction to Fixed InductorsFixed inductors, commonly known as chokes, are a type of electrical passive component used in power supplies and other applications. They are used to restrict AC current flow while permitting much less AC current flow through a winding that stores energy in the form of a magnetic field. Fixed inductors generally consist of a coil of wire, depending on the application and the desired characteristics. The DR74-330-R is a type of fixed inductor produced by Delvac Corporation, which is specialized in the production of these components. DR74-330-R Application Field and Working PrincipleThe DR74-330-R application field is broad, from simple hobby projects to complicated industrial applications. It is especially suitable for high frequency filtering in analog applications. This type of fixed inductor is powered by 1.5A (maximum) DC current, and offers an inductance of 330μH when powered by 7.8A DC current. The DR74-330-R consists of a ferromagnetic core coated with a special material, which is surrounded by a coil of wire, known as the winding. This winding is a specific type of copper wire for the construction of inductors. When supplied with a DC current, a magnetic field is produced that is proportional to the current flowing through the winding, thus creating an inductor. This inductor can serve as an AC current filter, allowing a small AC current to flow through the winding while restricting the flow of much larger AC currents.The DR74-330-R alloy inductors are designed to provide high-performance filtering and EMI (electromagnetic interference) suppression. This type of inductor is able to offer least core saturation and improved temperature and current response, which allows for more stable and consistent performance in high frequency applications. In addition to formal systems, these inductors are also developed for telecommunications, automotive components, CCTV systems, computer peripherals and high-power audio systems. Design and PerformanceThe DR74-330-R is designed to meet demanding EMI requirements, and is able to handle very high current levels while maintaining low core saturation and low temperature rise. It is also designed to have a low electrical resistance and provide high quality filtering and noise suppression. The inductor is manufactured with an alloy ferromagnetic material and filled with a dip coating for maximum heat dissipation and corrosion protection. These components are optimized for use with high-frequency, high-current applications. Furthermore, they are able to offer improved inductance linearity and improved temperature ratings, which makes them suitable for wide operating temperatures ranging from -40°C to +85°C while ensuring a stable performance. To ensure the utmost performance of DR 74-330-R, the components are tested strictly according to Quality Assurance International (QAI) functional tests. Special measures have been taken to improve the EMI performance and reliability of these components to meet the demands of current applications.ConclusionThe DR74-330-R from Delvac Corporation is a highly efficient fixed inductor. It is designed for use in a wide range of applications and is optimized for high-frequency and high-current applications. This type of inductor is able to provide improved inductance linearity and improved temperature ratings, while ensuring a stable performance. The components are tested strictly to ensure excellent performance and quality assurance.

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