Ultracapacitor Tester

M3628ACF Automatic Capacitor Former

The M3628UCT ultracapacitor tester is designed to determine the capacitance and ESR of cells and modules up to 20V. A full test cycle delivers an adjustable constant current to charge the test capacitor to a desired voltage, holds the test voltage, then discharges at a constant current. It can also be operated solely as a voltage source or current source/sink.

RoHS Compliant


  • Charges, discharges, and measures ultracapacitors
  • Variable output voltage: 2- 20 V
  • Digital control interface
  • Operates from standard 110-120VAC or 220-240VAC supply
  • Tough impact and weather resistant case


  • Accurate capacitance and Equivalent Series Resistance measurement
  • Over-current and over-temperature protection
  • Quickly charges and/or discharges ultracapacitors
  • Portable case on wheels


  • Measuring aging caps helps avoid preemptive replacement
  • Quick verification of both new and stored ultracapacitors
  • Decreases maintenance time and cost
Model Number Input Voltage Input Frequency Max Output Voltage Max Output Current Test Capacitance
M3628UCT-D30-120 90-132 VAC 47-63Hz 20 V 30 A 6,500 F
M3628UCT-D30-240 180-264 VAC 47-63Hz 20 V 30 A 6,500 F
Back to Top