The 100SEV330M18X21.5 is part of the SEV series of capacitors from Rubycon Corporation. It is a 330uF 100VDC Aluminum Electrolytic Capacitor with SMD leads. It has a tolerance of ±20% and a 2000 hour lifetime. Size is 18mm dia x 21.5mm and temperature of operation is from -40 to 85°C