XP™ Series 3F - 50F

Hot and humid environments present a variety of system engineering challenges: These conditions often limit lifespans and cause premature failure in competitor products, leading to higher numbers of field replacements and higher maintenance costs.

Maxwell’s XP™ Series overcomes these common industry challenges and comprises ultracapacitor cells designed specifically for reliable performance in applications operating in adverse conditions.

The XP Series includes all the benefits of the Standard Series with the added advantages of:

  • Advanced structure and sealing to provide the additional protection necessary for demanding environmental conditions and strict industrial standards
  • 3X the lifetime of Standard Series cells in high heat and humidity environments †

Industry Leading High Heat and Humidity Performance


This product line offers 2.7-volt ultracapacitor cells with storage capacities from 3 to 50 farads. XP Series cells are compliant with RoHS, UL and REACH requirements, giving you the confidence in your selection of the highest quality ultracapacitor energy storage solution for your system.

Maxwell’s XP Series cells operate in applications across industries and have contributed to our customers’ goal of zero system maintenance after deployment.

Design Benefits of the XP Series


Our Technology Innovation Cultivates Customer Field Success.

At Maxwell, we take pride in having paved the path for high-power, fast-response ultracapacitor energy storage solutions designed for short-term power requirements that many industries have struggled to meet using other energy storage technologies.

Maxwell’s experience in the design and development of ultracapacitor cells led to the company being first-to-market once again with a product line that provides our customers with the performance they need for high heat and humidity conditions.


  • Smart metering
  • Automotive (data logging, advanced driver assistance systems, autonomous driving, backup power)
  • Uninterruptable power supply (UPS)
  • Robotics
  • Telematics
  • Medical devices
  • Consumer electronics
  • Actuators
  • Emergency lighting
  • Security equipment


  • Enhanced performance in high heat and humidity; Biased humidity life of 2,500 hours*
  • Operating temperature range of –40°C to 85°C*
  • 3 to 50 farad capacitance range
  • Patent pending improvements both in structure and in sealing
  • Compliant with UL, RoHS and REACH
  • Improved ESR characteristics

Customer Benefits

  • Durability in demanding operating conditions results in reduced O&M costs over system lifetime
  • Flexibility for system operation in diverse environments
  • Provides flexible options for meeting customer’s rigorous system requirements
  • Increases lifetime by threefold compared to Standard Series
  • Proactive compliance with current regulatory standards, resulting in cost reduction and improved time-to-market
  • Higher power and energy densities meet customer specifications

* Results may vary. Additional terms and conditions, including the limited warranty, apply at the time of purchase. See the warranty details and datasheet for applicable operating and use requirements.
† Based on results from biased humidity testing.

Rated Voltage Rated Capacitance Typical DC ESRTerminalModel NumberDatasheet
2.7 VDC3 F55 mΩ Wire LeadBCAP0003 P270 X01Download
2.7 VDC5 F36 mΩ Wire LeadBCAP0005 P270 X01Download
2.7 VDC10 F25 mΩ Wire LeadBCAP0010 P270 X01Download
2.7 VDC25 F16 mΩ Wire LeadBCAP0025 P270 X01Download
2.7 VDC50 F10 mΩ Wire LeadBCAP0050 P270 X01Download
3.0 VDC3 F62 mΩWire Lead / Bent LeadBCAP0003 P300 X11/X12Download
3.0 VDC5 F 35 mΩWire LeadBCAP0005 P300 X11 Download
3.0 VDC10 F20 mΩWire Lead / Bent LeadBCAP0010 P300 X11/X12 Download
3.0 VDC25 F17 mΩWire Lead / Bent LeadBCAP0025 P300 X11/X12 Download
3.0 VDC50 F10 mΩWire LeadBCAP0050 P300 X11 Download