5Rack requirementsTable 1 Switch dimensions and rack requirementsModel Switch dimensions Rack requirementsS12516X-AF• Height—931 mm (36.65 in) (21 RU)• Width—440 mm (17.32 in)• Total depth—977 mm (38.46 in){ 857 mm (33.74 in) for the chassis{ 102 mm (4.02 in) from the rear side of themounting bracket front ear to themanagement bracket front end{ 30 mm (1.18 in) for the fan tray handle atthe rear of the chassis• A minimum of 1.1 m (3.61 ft) indepth (recommended.)• A minimum of 130 mm (5.12 in)from the front rack post to thefront door.• A minimum of 950 mm (37.40in) from the front rack post tothe rear door.S12512X-AF• Height—753 mm (29.65 in) (17 RU)• Width—440 mm (17.32 in)• Total depth—977 mm (38.46 in){ 857 mm (33.74 in) for the chassis{ 102 mm (4.02 in) from the rear side of themounting bracket front ear to themanagement bracket front end{ 30 mm (1.18 in) for the fan tray handle atthe rear of the chassisS12508X-AF• Height—531 mm (20.91 in) (12 RU)• Width—440 mm (17.32 in)• Total depth—977 mm (38.46 in){ 857 mm (33.74 in) for the chassis{ 102 mm (4.02 in) from the rear side of themounting bracket front ear to themanagement bracket front end.{ 30 mm (1.18 in) for the fan tray handle atthe rear of the chassisS12504X-AF• Height—264 mm (10.39 in) (6 RU)• Width—440 mm (17.32 in)• Depth—977 mm (38.46 in) when theLSXM104XFAN fan trays are installed{ 857 mm (33.74 in) for the chassis{ 102 mm (4.02 in) from the rear side of themounting bracket front ear to themanagement bracket front end{ 30 mm (1.18 in) for the fan tray handle atthe rear of the chassis• Depth—1016 mm (40 in) when theLSXM104XFANH fan trays are installed{ 857 mm (33.74 in) for the chassis{ 102 mm (4.02 in) from the rear side of themounting bracket front ear to themanagement bracket front end{ 69 mm (2.72 in) for the fan tray handle atthe rear of the chassisNOTE:As a best practice, use a rack that has a single door at the front.