SP1812-273G

DC Resistance (DCR):	1 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:	400mA
Current Rating:	430mA
Tolerance:	±2%
Inductance:	27µH
Material - Core:	Ferrite
Type:	--
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Fixed Inductors are a vital component in any electronic design that requires a certain degree of inductive behaviour. While variable inductors can be used to quickly adjust the inductance value by a large amount over a small range, fixed inductors are used to maintain a specific amount of inductance in a circuit. SP1812-273G is one of the most widely used fixed inductors in current applications, especially for the power supply industry. This article aims to discuss the characteristics, working principles, as well as some common applications of this component.The SP1812-273G fixed inductor is a two-winding air core inductor made of copper wire with a ferrite core. It has a moderate rated current of 1.5A and can withstand a maximum rated voltage of 420V peak. It is a standard, low-cost, and widely available product and meets most of the standard requirements for inductors with regards to size, material, and value.The working principle behind the SP1812-273G is that it stores energy in the form of a magnetic field when a current passes through it. The inductance of the component is determined by the core and wire material, geometry, and number of turns. By tuning these values, inductors with higher inductance values can be achieved. When an alternating current is passed through the inductor, a changing magnetic field is generated, which in turn creates an opposing electromotive force. This opposing EMF in turn limits the maximum current in the circuit, thus providing a steady output and protecting the other components from damage caused by voltage surges.Due to its high current carrying capacity, the SP1812-273G is widely used in power converter circuits, such as switching power supplies, flyback converters, resonant converter, and motor drive converters. It can also be used in noisy environments, such as automotive and aviation applications, due to its excellent noise suppression performance. It is also commonly used in high frequency circuits, such as telecommunications.The SP1812-273G is a great choice for applications that require robustness, durability, and high performance. It is often used in specific applications, depending on the need, such as high-current filters, high-frequency filters, transformers, chokes, and so on. The use of SP1812-273G in these applications requires specific parameters such as low DC resistance, high current carrying capacity, high acceleration rates, and high frequency response. The SP1812-273G offers several advantages over other inductors, such as its compact size and low cost. Compared to other components, such as capacitors, it can offer comparable performance in terms of EMI suppression, with minimal added size and cost. Furthermore, this component is also highly resistant to temperature changes, which can be beneficial for applications that may experience extreme temperatures or environments.Overall, the SP1812-273G is a reliable and cost-effective fixed inductor that can be easily incorporated into a wide range of applications. It can provide robust performance and excellent noise suppression, while also being small and easy to integrate into a design. Thus, it is an ideal choice for a variety of design requirements.

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