LB3218T4R7M Inductors, Coils, Chokes

DC Resistance (DCR):	130 mOhm
Height - Seated (Max):	0.079" (2.00mm)
Size / Dimension:	0.126" L x 0.071" W (3.20mm x 1.80mm)
Supplier Device Package:	1207 (3218 Metric)
Package / Case:	1207 (3218 Metric)
Mounting Type:	Surface Mount
Inductance Frequency - Test:	7.96MHz
Operating Temperature:	-40°C ~ 105°C
Ratings:	--
Frequency - Self Resonant:	41MHz
Q @ Freq:	--
Series:	LB
Shielding:	Unshielded
Current - Saturation:	--
Current Rating:	550mA
Tolerance:	±20%
Inductance:	4.7µH
Material - Core:	--
Type:	Wirewound
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Fixed InductorsFixed inductors are essential components in many electronic circuits, used to create an electromagnetic field when the current flows through them. One of the most common types of fixed inductors is the LB3218T4R7M. This article will discuss the application field and working principle of the LB3218T4R7M. The LB3218T4R7M is a surface mount inductor, making it ideal for use in smaller electronics applications, such as mobile phones, laptops, and other devices that require a smaller form factor. The LB3218T4R7M is a lead-free, halogen-free inductor, making it compliant with European RoHS regulations. It has a rated inductance of 4.7 µH, a maximum DC current of 1.1A, and a maximum DC resistance of 0.081 ohms. The main application field of the LB3218T4R7M is in power management circuits such as switch mode power supplies, DC/DC converters, and voltage regulators. These circuits require high power efficiency and fast switching times, and the LB3218T4R7M is an excellent choice for these applications due to its low DC resistance and high inductance. The LB3218T4R7M is also suitable for use in noise suppression and filtering circuits, as it can help reduce electromagnetic interference (EMI).The working principle of an inductor is relatively simple – it works by using the principle of electromagnetic induction. When AC or DC current is applied to the inductor, an electromagnetic field is created around the inductor. This field will induce a voltage in the inductor, which opposes the flow of current. This is known as inductive reactance, and it is measured in ohms. Since the inductor will oppose the flow of current, it will act as a filter, allowing low-frequency signals to pass while blocking high-frequency signals. The inductance of an inductor determines how much it will oppose the flow of current, and the LB3218T4R7M has a rated inductance of 4.7 µH. This means that it will be well-suited for use in applications that require relatively low inductance, such as power management circuits.To conclude, the LB3218T4R7M is a surface mount inductor that is well-suited for use in power management circuits, noise suppression and filtering circuits, and other applications that require low inductance and fast switching times. Its low DC resistance and high inductance make it ideal for use in these applications. Furthermore, it is compliant with European RoHS regulations, making it safe and environmentally-friendly.

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