Vishay Sprague 36D series high-reliability aluminum electrolytic capacitor designed for power supply filtering and bulk energy storage. This part is a chassis-mount / can-style capacitor with screw terminals.

Key specs (typical listing data):

• Capacitance: 12,000 µF DigiKey+2Mouser Electronics+2

• Rated voltage: 40 VDC DigiKey+2Mouser Electronics+2

• Type / mounting: Aluminum electrolytic, can (radial) with screw terminals, chassis mount DigiKey+1

• Operating temperature: –40°C to +85°C Microchip USA

• Approx. size: Ø ~52.8 mm x H ~108 mm Microchip USA

What the other markings usually indicate:

• EP40-123: commonly shown as an associated/house identifier for this capacitor configuration in distributor/industrial listings Radwell International

• 12000-40DC: shorthand marking for 12,000 µF / 40 VDC (often printed on the can) Radwell International+1

• 7308L: likely a lot/date code (format varies by manufacturer/production run; typically not the electrical rating)