SRP1245A-3R3M Inductors, Coils, Chokes

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Fixed inductors, also known as coils, chokes and reactor, are electrical components designed to store energy in the form of magnetic energy. The SRP1245A-3R3M is a fixed inductor designed by Sumida for high-density mounting applications in power supplies, consumer electronics designs, and automotive systems. It is ideal for use in power converters, including DC-DC converters used in PV inverters and other power supplies.

The SRP1245A-3R3M is a 12×12×4.5 mm, 77A 25/40MHz inductor. It is rated at 77A (10KHz) for an 8V DC bias voltage and 12V input. The inductance is 3.3µH min at 25°C and its SRF is typically 32MHz. The impedance is low, allowing it to be used in high-power applications, such as those requiring an output current of greater than 10A. It has a maximum DC current rating of 450mA. The product offers an ideal balance of size, high frequency characteristics, and current handling capabilities.

The SRP1245A-3R3M is designed to operate at frequencies of up to 40MHz. The device is constructed using high-grade ferrite cores. The material has an internal resistance that is lower than most other core materials, allowing for higher current levels. The body of the unit is epoxy sealed for added protection against dust, shocks, and vibration. The leads are gold-plated for improved reliability and high temperature stability.

The SRP1245A-3R3M has a number of applications in the field of electronics. It can be used as an inductor in DC/DC converters, power supplies, and other high-frequency switching applications. It is also often used to provide additional filtering in power supply designs. The device is ideal for use in automotive systems, such as electric vehicles, as its high current handling capability allows it to reduce the size of the power supply.

The SRP1245A-3R3M’s working principle is based on the concept of Faraday’s Law of Induction. This states that the voltage induced in a coil is proportional to the rate of change of magnetic flux. The magnetic flux is created by the current flowing through the inductor’s windings. When there is a change in the current, a voltage is induced across the inductor’s terminals.

The SRP1245A-3R3M is an ideal fixed inductor for high-density mounting applications in power supplies, consumer electronics designs, and automotive systems. It is able to deliver superior performance, thanks to its low impedance, high frequency characteristics, and current handling capabilities. Additionally, its epoxy-sealed construction makes it highly reliable, rugged, and resistant to dust, shocks, and vibration.

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