Juniper QFX5120 Series Hardware Guide

The labels on the fan modules and the power supplies indicate the direction of airflow they provide
within the chassis when installed in the switch. AIR IN (AFI) labels indicate back-to-front airflow, and
AIR OUT (AFO) labels indicate front-to-back airflow.
•
The DC in the model number indicates that the switch model works on DC power supply. Switches that
do not have DC in their model numbers work on AC power supply.
Chassis Physical Specifications for QFX5120 Switches
The QFX5120 switch chassis is a rigid sheet-metal structure that houses all components of the switch.
Table 5 on page 31 shows the physical specifications of the QFX5120-32C switch.
Table 5: Physical Specifications of the QFX5120-32C Switch Chassis
ValueDescription
1.7 in. (43.25 mm)Chassis height
17.26 in. (438.4 mm)Chassis width
20.27 in. (515.0 mm) excluding fan and power supply handlesChassis depth
21.12 lbs (9.12 kg) with two power supplies and fans installedWeight
Table 6 on page 31 shows the physical specifications of the QFX5120-32C switch chassis.
Table 6: Physical Specifications of the QFX5120-48Y Switch Chassis
ValueDescription
1.72 in. (4.37 cm)Chassis height
•
17.36 in. (44.09 cm)
•
The outer edges of the front-mounting brackets extend the width to 19 in.
(48.2 cm)
Chassis width
20.48 in. (52.02 cm) excluding fan and power supply handlesChassis depth
23.69 lbs (10.75 kg) with two power supplies and fans installedWeight
31

Juniper QFX5120 Series Specifications

General

Rack Units	1 U
Junos OS	Yes
Form Factor	Fixed
Power Supply	Dual, hot-swappable
Cooling	Front-to-back or back-to-front airflow
Fans	Hot-swappable
Operating Temperature	32°F to 104°F (0°C to 40°C)
Storage Temperature	-40°F to 158°F (-40°C to 70°C)
Humidity	5% to 90% non-condensing
AC Power Input	100 to 240 VAC
Management Ports	1x RJ-45 console, 1x USB, 1x RJ-45 management