S1210-121H

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Fixed inductors are passive components marked with several model numbers, such as S1210-121H, that are widely used in circuit designs as part of the feedback loop of voltage regulator circuits. The inductors can be used in high-power switching circuits for current limiting and control, as well as for reducing electrical noises. They may also be used in coupling/decoupling applications to prevent AC ripple from entering sensitive circuits.

The S1210-121H inductor is designed to have a relatively high inductance rating of 1200 μH with a tolerance of 5%, and a maximum DC resistance of 0.04 Ω. It operates at a maximum current rating of 127 A. The inductor is built to be highly reliable, using a toroidal ferrite core and a copper winding, and is packaged in a small size of 12.5 mm x 5 mm.

The working principle of the S1212-121H fixed inductor is simple. It passes direct current in either direction, allowing its winding to store up energy magnetically. This stored magnetic energy, which is converted back into electrical energy, will be released when the current is stopped.

The applications of the S1210-121H fixed inductor include power electronics, converters, switching circuits, telecom, as well as high-frequency switching circuits.

As a high-power switching inductor, the S1210-121H mainly works in the circuit of voltage regulator. By regulating the current, it can promote the stability of voltage regulator. Besides, it can also reduce the generated electronic current to diminish the noise.

In the telecom application, the S1210-121H acts as an isolation inductor between two circuits to prevent the AC ripple current from entering the sensitive circuit. When radios are to be used in a circuit, the S1210-121H acts as a coupling inductor to minimize the interference signals from entering the radio circuit.

For high-frequency switching circuits, the S1210-121H operates as a current-limiting inductor to prevent high current from damaging the components. It also works to reduce the ringing impedance and the spikes on the drain-source voltage.

In conclusion, the S1210-121H fixed inductor is widely used in many circuit designs with a variety of applications. Its features make it highly reliable for current regulation, protection from electronic noise, coupling and decoupling of circuits, and current limiting for high-frequency circuits.

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