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by Juniper
Product Line: Juniper EX4300 Series
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Product Description

The EX4300-48P-TAA is a Trade Agreement Act-compliant, 48-port switch offering 10/100/1000BASE-T PoE-plus connectivity with a 1100 W AC power supply, delivering up to 950 W for PoE+ devices across 48 ports with a total PoE budget of 900 W. It supports up to four 40GbE ports through an optional module, and features a 320 Gbps Virtual Chassis interconnect capability, allowing up to 10 units to function as a single device. With packet switching capacities of 248 Gbps (unidirectional)/496 Gbps (bidirectional) and a throughput of 369 Mpps, it ensures high-speed data transfer and efficient operation within a temperature range of 32° F to 113° F, and at altitudes up to 10,000 ft.

FAQs for the EX4300-48P-TAA

  • What is the total PoE+ power provided by the EX4300's 1100 W AC power supply?
    The EX4300's 1100 W AC power supply provides up to 950 W of PoE+ power.
  • How many ports support 10/100/1000BASE-T PoE/PoE+ on this device?
    The device supports 48 ports for 10/100/1000BASE-T PoE/PoE+.
  • What is the maximum 40GbE port capacity of the EX4300 with an additional module?
    With an additional module, the EX4300 can support up to 4 40GbE ports.
  • How does the EX4300 ensure efficient cooling?
    The EX4300 utilizes AFO (Front-to-back airflow) and includes two field-replaceable fans to ensure efficient cooling.
  • What is the maximum operational altitude for the EX4300?
    The maximum operational altitude for the EX4300 is 10,000 feet (3,049 m).
  • Can the EX4300 be used in a Virtual Chassis configuration? If so, what is the backplane speed?
    Yes, the EX4300 can be used in a Virtual Chassis configuration with a backplane speed of 320 Gbps.
  • What are the dimensions of the EX4300 with the power supply installed?
    With the power supply installed, the EX4300's dimensions are 17.36 x 1.72 x 17.51 inches (44.1 x 4.37 x 44.47 cm).
  • What is the PoE budget of the EX4300?
    The EX4300 has a PoE budget of 900 W.
  • What are the packet switching capacities of the EX4300?
    The EX4300 has packet switching capacities of 248 Gbps unidirectional and 496 Gbps bidirectional.
  • What is the system weight of the EX4300 and how does it vary with additional components?
    The base unit of the EX4300 weighs 2.4 lb (1.1 kg), and the fan module adds an additional 0.33 lb (0.15 kg).

Product Review

The Juniper EX4300-48P-TAA offers a high PoE budget of 900W across its 48 10/100/1000BASE-T ports, supporting demanding PoE+ devices, which is a significant advantage for dense deployments. However, its maximum of four 40GbE ports might limit high-speed uplink or stacking capabilities in environments requiring extensive data throughput. Additionally, the switch's ability to function within a Virtual Chassis of up to 10 units, thanks to its 320 Gbps backplane interconnect, simplifies management and scalability but requires consideration of the overall cost and complexity in large-scale deployments.


The Juniper EX4300-48P-TAA is a network switch designed to meet the needs of demanding enterprise environments, offering a combination of performance, flexibility, and scalability. This device is compliant with the Trade Agreement Act (TAA), ensuring it meets the necessary federal procurement requirements. It features 48 10/100/1000BASE-T ports that support both Power over Ethernet (PoE) and PoE+, making it suitable for powering devices such as VoIP phones, wireless access points, and surveillance cameras directly through the network cables, eliminating the need for additional power supplies. The switch comes equipped with a 1100 W AC power supply, which provides up to 950 W of PoE+ power, with a total PoE budget of 900 W to efficiently distribute power among connected devices. Key hardware specifications include: - Access Port Configuration: Offers 48 10/100/1000BASE-T PoE/PoE+ ports. - PoE Budget: Delivers a total of 900 W for PoE devices. - Power Supply Rating: Features a 1100 W AC power supply for robust power delivery. In terms of scalability and performance, the EX4300-48P-TAA supports up to four 40GbE ports through an optional module, enhancing its uplink capabilities and future-proofing the investment for growing networks. The device boasts a backplane with a 320 Gbps Virtual Chassis interconnect capacity, allowing up to 10 units to be combined as a single logical device. This capability simplifies management and increases operational efficiency by providing a single point of control. The physical dimensions of the base unit are 17.36 x 1.72 x 16.38 inches, expanding to 17.36 x 1.72 x 18 inches with the power supply and front module installed, making it a compact solution for rack-mounted installations. The system's weight starts at 2.4 lbs, with field-replaceable fans weighing an additional 0.33 lbs, ensuring easy maintenance and serviceability. The designed airflow from front to back supports efficient cooling, with the PSU providing 7.5 cubic feet per minute of air circulation. From a performance standpoint, the EX4300-48P-TAA provides a packet switching capacity of 248 Gbps unidirectional and 496 Gbps bidirectional, supporting a throughput of 369 Mpps (million packets per second) at wire speed. This ensures high-speed data transfer and minimal latency across the network. The GbE port density per system can reach up to 56, including the 48 host ports and additional uplink options. The operating temperature range of the switch is from 32°F to 113°F, with a storage temperature range from -40°F to 158°F. It can operate at altitudes up to 10,000 feet, and be stored at altitudes up to 16,000 feet, ensuring reliability in a wide range of environmental conditions. Overall, the Juniper EX4300-48P-TAA is engineered to accommodate the evolving needs of modern networks, offering a high degree of flexibility, scalability, and power efficiency. Its performance capabilities make it an ideal choice for enterprises looking to deploy a high-density, PoE-enabled network infrastructure with simplified management and future growth potential.


Part NumberEX4300-48P-TAA
Configuration48 x 10/100/1000BASE-T PoE+ Ports
Total Ports48
PoE Power Budget900 W
Max 40GbE Ports4 with module
Power Supply Capacity1100 W AC, 950 W for PoE+
CoolingFront-to-back Airflow
Interconnect Bandwidth320 Gbps Virtual Chassis technology
Dimensions Without PS17.36 x 1.72 x 16.38 in
Dimensions With PS17.36 x 1.72 x 17.51 in
Full Dimensions17.36 x 1.72 x 18 in
Weight2.4 lb
Fan Weight0.33 lb
Replaceable Fans2
Fan Airflow7.5 CFM
Switching Capacity248/496 Gbps
Port Density56 GbE ports
Throughput369 Mpps
Min Operating Temp32° F
Max Operating Temp113° F
Min Storage Temp-40° F
Max Storage Temp158° F
Operating AltitudeUp to 10,000 ft
Non-operating AltitudeUp to 16,000 ft

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