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SuperCapacitors | Pros & Cons | Why Choose a SuperCapacitor?

Capacitors or Double Layer Capacitors have rapidly become recognized, not only as an excellent compromise between “electronic” or “dielectric” capacitors such as ceramic, tantalum, film and aluminum electrolytic, and batteries, but also as a valuable technology for providing a unique combination of characteristics, particularly very high pulse power and capacitance densities.

SuperCapacitor Technology | EDLCs | Electrochemical Double-Layer
  • Capacitance Values: 0.33F to 1000s of Farads
  • Activated carbon amplifies the surface area A of the electrode
  • d is defined by the diameter of the salt ion in the electrolyte
  • Voltage, however, is now a function of temperature & voltage
Key Things to Know Before Selection
  • Operating Temperature Range - Most Critical!!!
  • Application: Energy Harvesting, Pulse Power, Power Hold-Up or Battery Replacement
  • Importance of ESR and Leakage Current to the Design
  • Operating Voltage
  • Expected Life Time
  • Cost Feasibility
AVX | SCC Series
  • Capacitance Range: 1F to 3,000F
  • Voltage Range: 2.7V to 3.0V
  • Operating Temperature: -40 deg c to +85 deg c
  • Provides extended back-up time, longer battery life & instantaneous power pulses
AVX | SMC Series
  • Capacitance Range: 0.33F to 500F
  • Voltage Range: 5.0V to 48V
  • Operating Temperature: -40 deg c to +85 deg c
  • Customisable to attain higher rated voltages
SuperCapacitors vs Battery
Pros Cons
Long life cycle Low specific energy
High load currents Linear discharge voltage
Fast charging times Slightly higher self-discharge
Good temperature performance High cost per Wh
Pros Cons
Power density Limited life cycle
Storage capability Voltage and current limitations
Better leakage current Long charging times
Constant voltage Very temperature sensitive