XB Supercapacitors


Snap-in cylindrical supercapacitors

300, 400 and 600 Farad XB family deliver reliability with the longest life available for high power supercapacitors

High Capacitance

300 F, 400 F and 600 F versions of the XB Family provide long term power backup and high peak current capability. Slower aging enables longer service life, operation at higher temperatures, or lower initial capacitance than competitors.

Environmentally Friendly

The RoHS compliant, halogen free, lead free XB Family contains no hazardous materials or presents any end-of-life disposal issues.

Ultra-Low Equivalent Series Resistance (ESR)

Ultra-Low ESR (as low as 3.7 mΩ) increases the amount of power delivered to the load and ensures minimal voltage drop during peak current demand. And…compared to the competition, resistance increase with age is greatly reduced.

Long Operating Life

With an achievable operating life of 10-years, the XB Family supercapacitors enable longer end-equipment service life and will not need replacing.

Configurable for Voltage or Energy Storage
The XB Family is easily configured in series and parallel to meet specific application requirements.

Features & Benefits

  • Over 10-year operating life at room temperature
  • Low ESR for high power density
  • Large capacitance for high energy density
  • Long cycle life
  • Environmentally friendly electrolyte
  • UL Recognized


  • Hybrid Battery or  Fuel Cell Systems
  • High Pulse Current Applications
  • UPS / Hold-Up Power

Product Profile # 4073

Data Sheet # 4423

Soldering Guidelines

Inventory Availability

Order Sample

Catalog Number XB3550-2R7307-R, XB3560-2R5407-R, XB3585-2R5607-R
Capacitance 300 F
400 F
600 F
Working Voltage 2.5 V
Surge Voltage 2.85 V
Capacitance Tolerance -10% to +10%
Operating Temperature Range -25 °C to +70 °C
Environmental - Lead free
- Halogen free
- RoHS compliant
Dimensions See data sheet # 4423