SP1812-124G

DC Resistance (DCR):	4.6 Ohm Max
Height - Seated (Max):	0.134" (3.40mm)
Size / Dimension:	0.189" L x 0.134" W (4.80mm x 3.40mm)
Supplier Device Package:	--
Package / Case:	Nonstandard
Mounting Type:	Surface Mount
Inductance Frequency - Test:	1kHz
Operating Temperature:	-55°C ~ 125°C
Ratings:	--
Frequency - Self Resonant:	--
Q @ Freq:	--
Series:	SP1812
Shielding:	Shielded
Current - Saturation:	188mA
Current Rating:	210mA
Tolerance:	±2%
Inductance:	120µH
Material - Core:	Ferrite
Type:	--
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Fixed Inductors: SP1812-124G Application Field and Working PrincipleFixed inductors are a type of passive electric component that stores energy in the form of a magnetic field when electrical current passes through it. They can be used in a variety of applications such as voltage regulation, electromagnetic interference (EMI) reduction, signal filtering, and radio-frequency (RF) wave shaping. The SP1812-124G fixed inductor is a surface mount device (SMD) from TRS Electronics-USA with the following specifications: 0.2 ohms DC resistance, 2500 nanoseconds inductance, and 250 volts direct current (DC) rating.The main function of the SP1812-124G is to perform several important electrical roles, such as limiting the amount of current allowed to pass through, reducing high frequency noise, and creating a regulated voltage for a specific circuit. It works by inducing an opposing flux in the coil when an electric current passes through it. This opposing flux creates a counter electromotive force (back EMF) which resists its own current and limits the flow of electrons through the circuit.The SP1812-124G is usually used in analog circuits and digital circuits, and is the most suitable fixed inductor for high frequency applications. It is designed to divert the ground loop current from interfering with the circuit’s signal path, resulting in cleaner, more accurate signals. This inductor can also be used for RF wave shaping to eliminate noise and signal distortion, and increase signal-to-noise ratio (SNR).The SP1812-124G is also used in voltage regulation to improve the performance of certain circuits. Voltage regulation often requires some form of impedance to reduce the peak values of alternating current (AC) voltages and divert the current around the actual load. By increasing the inductance of a circuit, the SP1812-124G can reduce the peak value of AC voltages, improving the efficiency of the voltage regulator.The most common application for the SP1812-124G fixed inductor is for EMI reduction. EMI is the reflection of unwanted RF energy on printed circuit boards (PCBs) and other electrical components, which can cause interference between systems. By using an inductor to absorb the EMI before it can reach other sensitive circuits, the interfering signals can be safely blocked without affecting the signal quality.The SP1812-124G can also be used in signal filtering to filter out high frequency signal contaminants and improve the signal quality. Its high frequency response ability makes it suitable for filtering both high frequency and low frequency noise, making it especially useful for audio and video applications.Overall, the SP1812-124G is an ideal fixed inductor for a variety of applications due to its robust design and its ability to reduce EMI, voltage regulation, and signal filtering. Its small form factor and wide temperature range also make it well-suited for environmental extremes and cramped space requirements.

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