The power cord that runs from the AC power outlet to the external power supply brick is a NEMA 1-15 to IEC 60320 C7.
The input side of the external power supply has a standard IEC 60320 C8 type input. The power supply output cord has a 5.5 x 2.5 mm barrel connector.
Outer: 5.5 mm
Inner: 2.5 mm
(5.5 x 2.5 mm Barrel Connector)
|Input||100 - 240||50 - 60||1.0|
Please ensure that you purchase a 12 Volt power supply with a minimum of a 5 Amp rating. A higher Amp rating is okay to use.
Some listings have multiple products versions available on the same page.
Amazon.com - COOLM AC Adapter 12V 10A Power Adapter AC 100-240V to DC 12V Power Supply Charger with 5.5mm x 2.5mm DC Plug
NOTE: I have purchased and used this power supply. At the time of adding to the wiki I have used this power supply for approximately 40-50 hours of printing on a Select Mini V2 without any problems. The barrel plug fits the printer snugly as it should. Being the plug on the Mini Delta is the same size as on the Select Mini, this power supply will work.
Amazon.com - SHNITPWR 12V 7A 84W Adapter AD/DC 110V 100-240V 50/60 Hz to 12V Power Supply
NOTE: I use this power supply without any problems on both the Select Mini and Mini Delta. The barrel plug fits the printer snugly as it should.
Delippo 12V 10A 120W Power Adapter Strip Light Supply 5050 2835 LED strip 100V-240V Power Supply
NOTE: I have not used this power supply but it does match the specifications for power and the proper plug size for the printer.
Amazon.com - Winkeyes AC 100-240V to DC 12V 10A Switching Power Supply Adapter
It was reported by a user on July 3, 2018 that this power supply is now shipping with a 5.5 x 2.1mm on all outputs.
This power supply has a 5.5mm x 2.5mm connector and includes a pigtail splitter with eight 2.1mm connectors. The splitter cable is not needed. The product description refers to the 2.1mm pigtail ends.
NOTE: As of the last time I purchased on June 24, 2017 and Amazon reviews from January 2018, the power supply did ship with the appropriate size connector which is 5.5 x 2.5mm. This may not be the case any longer so I'll try to locate a suitable replacement that isn't $48.