QCT1250 psu upgrade to QBT1250 oem 260/360w psu

Do you have a link for the 360 watt PSU? 
 I was also wondering if anyone successfully upgraded QTC1250 PSU to maybe 500-750 Watts . Thank you !

Chances are these psu are not for sale from Dell now but will be soon when they first meet the needs of new pc.  They reserve these for new pc purchases that include high end discrete RTX gpu from Dell.

460w psu or previous 500w psu from Optiplex 7000/7010/7020 tower and Inspiron 3910/3020/3030 will fit QCT/ECT1250.  

750w psu was used in XPS8950/8960 and Aurora R13+.  It has not been validated in Optiplex or Inspiron by users.

Dell 460w psu Dimensions: 120mm x 62mm x 185mm. It fits ECT1250.  120 mm is width of psu.

Aurora R13 750w psu

750W,M92DC,M2G8X,H750EPS-00

Size: 185*150*62mm, 150 mm is width of psu.

ECT1250 is 154 mm wide. So theoretically the 750w psu is a tight fit, but really no one has reported need for such high power psu yet in Optiplex or Inspiron tower (which has same chassis dimensions as ECT)

@redxps630​ thank you !, the 460 watt PSU part number is

HU460EBS-00? Also has anyone tried to fit a C253W/T4G2X cooler into one of these QCT/QBT1250 ? 

I doubt C253W cooler would fit. It was designed for a wider chassis such as XPS8950/60 (173 mm wide) as well as Optiplex 7000 tower which has same width as 7020/7010 tower plus, but those Optiplex chassis are 169 mm wide quite a bit wider than 154 mm width of ECT1250 which has same chassis dimensions as 7020/7010 tower (non-plus).

it is quite possible a C253W cooler in ECT1250 makes it impossible to close removable side panel as it may stick its heat pipes head outside case like a giraffe in a chimpanzee cage.

460w psu include

Inspiron 3020/3030 460W PSU =
4H6F4 AC460EBS-00
5W40K HU460EBS-00

VTG94 Chicony

@redxps630​ thank you so much for all your help !