Backup Supercapacitor EB391818875 THT electrolytic capacitor — model EB391818875

The EB391818875 THT electrolytic backup supercapacitor is a through-hole component designed to provide short-term energy storage and reliable temporary power delivery for electronic circuits. It is intended for applications where compact backup energy is required to maintain settings, support real-time clocks, or supply brief bursts of power during power-fail events. The component’s THT format facilitates secure PCB mounting and mechanical stability in a variety of board designs.

Advantages

This backup supercapacitor offers fast charge and discharge capability, high cycle life compared with traditional batteries for repeated short-term backup use, and stable performance across typical operating temperatures. Its through-hole package ensures robust solder joints and mechanical retention on printed circuit boards, and the electrolytic construction delivers a favorable energy-to-size ratio for compact applications.

Suitable for

• Power-fail protection of microcontrollers and embedded systems
• Maintaining real-time clocks and non-volatile settings during short outages
• Buffer power for communication modules during brownouts
• Energy-hold for low-power sensor nodes and data-logging devices

Key specifications

• Mounting type: through-hole (THT) for PCB installation
• Device type: electrolytic backup supercapacitor for short-term energy storage
• Typical characteristics: designed for fast charge/discharge cycles and repeated buffering operations
• Mechanical: compact cylindrical/axial or radial through-hole package suitable for soldering and wave/manual assembly
• Operating temperature: suitable for common industrial and consumer electronics ambient ranges

How to use

Install the supercapacitor on the printed circuit board according to the board layout and polarity markings, observing correct lead orientation and soldering practices for through-hole components. Use appropriate series resistance or charge-limiting circuitry when charging the device to control inrush current. Place the component near the circuit elements it is intended to back up, such as real-time clock modules or microcontroller power domains, to minimise trace resistance and voltage drop during discharge.

Usage recommendations

Store and operate the supercapacitor within manufacturer-recommended temperature and humidity ranges. Avoid prolonged exposure to high temperature which can reduce service life. For reliable backup behavior, verify charge levels periodically in the system design and include appropriate protection against reverse polarity and overvoltage conditions.