M39003/03-4028/TR

Tantalum capacitors are widely used in high power electronics due to their numerous advantages, such as high stability and low leakage. The M39003/03-4028/TR is a discrete tantalum capacitor that can meet the rigorous requirements of high power electronics, including automotive, industrial, and defense applications. This article is divided into two sections. The first section will discuss the application field and advantages of the M39003/03-4028/TR, and the second section will provide an overview of its working principle.

Application Field and Advantages

The M39003/03-4028/TR is part of the Military Standard (MIL-PRF-39003) series of radial solid tantalum capacitors with a voltage rating of up to 50 volts. It is designed for use in applications where high current, high energy, and high temperature are required, including automotive, industrial, and defense electronics. The capacitor’s small size and high capacitance value make it suitable for applications where limited available space is a requirement.

The M39003/03-4028/TR is designed to meet performance requirements of NEMA and UL 1994 standards, and its case is made of a glass over-mold material with an exterior coating to improve its heat and moisture resistance. The capacitor also has several advantages over other discrete capacitors, including a wide operating temperature range (-55°C to 125°C), a low equivalent series resistance (ESR), and a high ripple current rating. Additionally, the capacitor has a high energy density, making it a suitable choice for high power applications.

Working Principle

A solid tantalum capacitor consists of a solid tantalum anode, a conductive solid-state electrolyte, and a cathode, typically made of manganese dioxide. When voltage is applied to the capacitor, the electrolyte becomes ionized and generates an electrical field inside the capacitor. This electric field is responsible for the capacitor’s capacitance. The solid-state electrolyte also causes the capacitor to store a relatively large amount of energy.

When current flows through the capacitor, it is converted into thermal energy, which must be dissipated. The M39003/03-4028/TR capacitor has a high energy density and is therefore able to operate at high temperatures, which minimizes the amount of energy that must be dissipated. Additionally, the capacitor’s small size also aids in this process.

The M39003/03-4028/TR has a long operating life and is resistant to damage from shock or vibration. This is due to the solid-state electrolyte, which does not allow electric current to leak out of the capacitor. The capacitor is also able to withstand high temperature and humidity, making it suitable for applications where extreme environmental conditions are present.

In summary, the M39003/03-4028/TR is a discrete tantalum capacitor that is designed for use in applications requiring high current, high energy, and high temperature, such as automotive, industrial, and defense electronics. It has advantages over other discrete capacitors, such as a wide operating temperature range, a low ESR, and a high ripple current rating. The capacitor’s working principle involves generating an electrical field inside the capacitor with an ionized electrolyte, which is responsible for its capacitance and energy density.