The 50PX1MEFC5X11 is part of the PX series of capacitors from Rubycon Corporation. It is a 1uF 50VDC Aluminum Electrolytic Capacitor with Radial leads. It has a tolerance of ±20% and a 1000 hour lifetime. Size is 5mm dia x 11mm and temperature of operation is from -55 to 105°C