SD12-330-R

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Fixed inductors, such as the SD12-330-R, are active components of electrical circuits, most typically in applications involving radio frequency shielding and signal conditioning. Used as part of a filter network, an inductor limits the current amplitude or phase shift of the circuit’s output signal.

The SD12-330-R is an example of a fixed inductor, meaning it is a non-adjustable device designed to introduce a pre-determined amount of inductance to a circuit. As such, it cannot be used to adjust a signal during operation and should only be installed on the circuit board before power up.

The working principle of an inductor in general is quite simple: an electric current passing through a coil of wire induces a magnetic field that can be used to create a back EMF. In this case, the SD12-330-R has a coreless design, meaning it doesn’t need a physical core to sustain the magnetic field. This self-contained design eliminates the need for bulky transformers and reduces manufacturing costs.

The SD12-330-R is designed for an operating temperature range of -40°C to +85°C and is available in an RoHS version. It has a high impedance range of 10 to 30 ohms and is rated at a max current of 1A. It also features a broad frequency range of DC-1.2kHz and an inductance of 33.0 mH.

The SD12-330-R is commonly used in line output stages of audio amplifier circuits to filter high frequency noise in the signal. It is also useful in RF shielding applications, as its high impedance and wide frequency range can attenuate high frequency noise. In addition, it is often used to mitigate interference and crosstalk in communication systems. Last but not least, it can be used as a current limiter in current transformer circuits.

In summary, the SD12-330-R is an example of a fixed inductor designed to reduce high frequency noise in a range of electronic and communication applications. It has a wide frequency range and high impedance, making it well-suited to RF shielding, current limiting, and other signal conditioning applications. Its RoHS-compliant coreless design also eliminates the need for bulky transformers, making the SD12-330-R an efficient and affordable active component for various circuit designs.

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