IR04ST121J

Q @ Freq:	65 @ 790kHz
Height - Seated (Max):	--
Size / Dimension:	0.180" Dia x 0.385" L (4.57mm x 9.78mm)
Supplier Device Package:	Axial
Package / Case:	Axial
Mounting Type:	Through Hole
Features:	--
Inductance Frequency - Test:	790kHz
Operating Temperature:	-55°C ~ 105°C
Ratings:	--
Frequency - Self Resonant:	8.7MHz
Series:	IR
DC Resistance (DCR):	5.2 Ohm Max
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	124mA
Tolerance:	±5%
Inductance:	120µH
Material - Core:	Iron
Type:	--
Part Status:	Obsolete
Packaging:	--

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Fixed Inductors: IR04ST121J Application Field and Working Principle

Fixed inductors are passive electronic components that store energy in magnetic fields when electric current flows through them. They can come in a variety of shapes and sizes depending on the application. They are commonly used in applications where high current and low voltage needs to be handled, such as in power supplies, switching power converters, and motor control systems. The IR04ST121J is a low-cost, compact, fixed inductor that is commonly used in power supplies. Its low profile makes it ideal for compact sizes and its high current ratings make it a good fit for applications that require high power conversion efficiency. It is designed to reduce input voltage ripple and provides protection from overloading and short circuits.Features and Benefits:The IR04ST121J has a number of key features that make it an attractive choice for power supplies and other high current applications. These include its low-profile shape and low-cost price, as well as its high current rating, low temperature coefficient, and excellent EMI/EMC suppression capabilities.The IR04ST121J’s low-profile shape and low-cost price make it an attractive choice for applications where space and cost are of paramount importance. Its low temperature coefficient makes it an excellent choice for applications where temperature and humidity have a large impact on performance. In addition, its high current rating and high power conversion efficiency means that it can handle high levels of current without experiencing performance degradation. Its excellent EMI/EMC suppression makes it an ideal choice for environments that require high levels of protection from interference.Working Principle:The IR04ST121J works on the principle of inductors. When a current is passed through a coil of wire, a magnetic field is created around it. This magnetic field then induces a voltage in the windings which opposes any change in the current, thus creating self-induced voltage. This opposes the current flow and effectively resists any further changes in the current. In this way it acts as an inductor and stores energy in the magnetic field rather than generating it. Applications:The IR04ST121J is a versatile fixed inductor that can be used in a variety of power supply and other high current applications. It is commonly used in DC-DC converters, AC-DC converters, motor control systems, telecom and computer equipment, and in other automotive and industrial applications.Conclusion:The IR04ST121J is a low-cost, compact inductor that is commonly used in power supplies and other high current applications. Its low-profile shape and low-cost price make it attractive for applications where space and cost are of paramount importance. Its high current rating, low temperature coefficient, and excellent EMI/EMC suppression capabilities make it an ideal choice for a variety of high current applications.

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