B41231A8129M000

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Catalog for B41231A8129M000

Aluminum Electrolytic Capacitors

Introduction

B41231A8129M000 aluminum electrolytic capacitor belongs to a non-polar device, which is a kind of capacitor that can store energy in the electric field. This capacitor is characterized by large capacitance, wide temperature range, good self-healing property and low leakage current. It is applied extensively in electronic industry.

Application Field

B41231A8129M000 aluminum electrolytic capacitor can be widely used in various industries, such as audio equipment, automotive electronics, computers, industrial control, etc. It can be used in DC motor start circuits, DC power supply input/output decoupling, power filters, radio interference suppression, etc.

In automotive electronics, for example, B41231A8129M000 aluminum electrolytic capacitor can be used in the fuel injection system of a car, which can provide high-performance circuit decoupling, filtering and frequency compensation. It can also be used in the electronic throttle control system to suppress the interference of electromagnetic signals; in the electronic control module (ECM) of the car, it provides stable voltage source to the control circuit.

Working Principle

The aluminum electrolytic capacitor consists of a positive electrode, a negative electrode and a non-polar and long-life organic electrolyte. The positive electrode is an aluminum foil with an oxide coating formed by anodizing, and the negative electrode is called a cathode foil. The capacitor is produced by winding these two foils with paper and other separators.

When a voltage is applied to the two electrodes, the thin oxide film on the anode attracts positive ions and electrons from the electrolyte, resulting in the formation of an electric double layer. The electric field generated by the electric double layer on the anode surface then forms electric field inside the capacitor, making it to store energy.

Moreover, the electrolyte of aluminum electrolytic capacitor has a weak conductivity. The principle of self-healing, which is an important feature of aluminum electrolytic capacitors, is due to this weak conductivity. When the thin oxide film of the anode is broken due to electrode characteristic and thermal stress, ions in the electrolyte will form conductive bridge between the anode and cathode, thus restore damaged oxide film.

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