Cisco UCS C420 Server Installation and Service Guide
Technical Specifications
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Table of Contents

Server Specifications

Physical Specifications

Environmental Specifications

Power Specifications

Server Specifications

This appendix lists the technical specifications for the Cisco UCS C420 Server and includes the following sections:

Physical Specifications

Table A-1 lists the physical specifications for the server.

Table A-1 Physical Specifications



3.5 in (89 mm)


17.6 in (447 mm)

Length (including slide-rail inner rails)

31.5 in (800 mm)

Weight (maximum configuration)

78 lbs (35.38 kg)

Weight (maximum configuration, including slide rail inner rails and cable management arm)

86 lbs (39.00 kg)

Environmental Specifications

Table A-2 lists the environmental specifications for the server.


Table A-2 Environmental Specifications


Temperature, operating

5ºC to 35ºC (41ºF to 95ºF)

Temperature, nonoperating

(when the server is stored)

–40ºC to 65ºC (–40ºF to 149ºF)

Humidity, nonoperating

10% to 90%

Altitude, operating

Derated 1ºC for each 305 m

0 m to 3048 m (0 ft to 10,000 ft)

Altitude, nonoperating

(when the server is stored)

0 m to 12,192 m (0 ft to 40,000 ft)

Power Specifications

Table A-3 lists the specifications for each 1200 W power supply (Cisco part number UCSC-PSU2-1200).


Table A-3 1200 W Power Supply Specifications


AC input voltage

Nominal range: 100–120 VAC, 200–240 VAC

(Range: 90–132 VAC, 180–264 VAC)

AC input frequency

Nominal range: 50 to 60Hz

(Range: 47–63 Hz)

Maximum AC input current

11 A at 100 VAC

7 A at 200 VAC

Maximum input volt-amperes

1456 VA

Maximum output power per PSU

800 W at 90–180 VAC

1200 W at 180–264 VAC

Maximum inrush current

30 A (sub-cycle duration)

Maximum hold-up time

12 ms at 1200 W

Power supply output voltage

12 VDC

Power supply standby voltage

12 VDC

Efficiency rating

Climate Savers Platinum Efficiency (80Plus Platinum certified)

Form factor


Input connector

IEC60320 C14

You can get more specific power information for your exact server configuration by using the Cisco UCS Power Calculator: