ELJ-FB8R2MF

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Fixed Inductors are passive electrical components used to store energy in an electric field and release it through the electric current. It usually consists of a coil or a frame of ferromagnetic material, which improves its performance and provides a magnetic field around the element. They are essential components in electronics because they reduce the size and cost of the physical bulk required for components such as capacitors.

The ELJ-FB8R2MF is part of the Fixed Inductor family and finds its application predominantly in power conversion applications, given its robust construction and reliable performance. It features a polycarbonate case made of non-combustible material and a temperature range of -40°C to +100°C, making it a great choice for power circuits and embedded circuits with space constraints. Its low DCR (direct current resistance) also makes it suitable for automotive applications due to its wide operating temperature range. Furthermore, it has a wide inductance range (0.20 – 8.2 mH) and a wide current range (0.15 – 5.25 A) making it ideal for applications requiring high power ratings.

The working principle behind the ELJ-FB8R2MF is quite simple. When a current passes through the coil, it creates an electromagnetic field around it. The coil has an inductance, which describes how much the magnetic field rises for a specific current. This magnetic field will induce a voltage into the coil, which will increase the current in the circuit, resulting in the current rising again and creating more magnetic field, resulting in a higher voltage. This process occurs constantly as long as the current is applied, giving rise to a self-perpetuating effect.

Inevitably, this self-perpetuating effect can cause instability in the power circuit when a high level of current is passed through the ELJ-FB8R2MF, due to over-voltage protection (OVP). While it is possible to install an over-voltage protection circuit to mitigate these issues, this will add to the total cost of the project. Thus, the ELJ-FB8R2MF should only be used in low-power projects or projects with a high power rating, while the former should feature switched-mode power supplies (SMPS).

In conclusion, the ELJ-FB8R2MF is a robust, reliable and cost-effective fixed inductor with a wide range of inductance and current ratings. It features a non-combustible polycarbonate body and a wide temperature range, making it a great option for automotive applications. Due to its self-perpetuating behaviour, it is recommended to use in low-power projects or those featuring SMPS to prevent over-voltage protection issues.

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