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EX4300-48T-DC
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EX4300, 48-Port 10/100/1000BaseT + 550W DC PS
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EX4300-48T-DC
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- EX4300, 48-Port 10/100/1000BaseT + 550W DC PS
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EX4300-48T-DC Overview
EX4300-48T-DC is a high-performance, rack-mounted Ethernet switch built with an advanced, scalable architecture that supports both Layer 2 switching and basic Layer 3 routing, making it ideal for enterprise access and campus networks. EX4300-48T-DC is engineered with Virtual Chassis stacking technology that enables multiple switches to operate as a single logical device, boosting overall performance and simplifying network management.
EX4300-48T-DC delivers versatile power options with a dedicated DC power supply and is designed for compact environments without compromising on throughput. The switch features 48 10/100/1000 Ethernet ports alongside 4 SFP uplink ports, providing the flexibility required for high-density deployments, data center interconnect, and mission-critical applications where scalability and reliability are paramount.
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EX4300-48T-DC Specifications
- Product Type
- Switch
- Layer Supported
- Layer 2 / Layer 3
- Form Factor
- Rack-mount
- Number of Ethernet Ports
- 24–48 Ports
- Manageable
- Managed
- Ethernet Technology
- 10/100/1000
- Redundant Power Supply Supported
- No
- IOS
- LAN Base
- POE Support
- Non POE
- SFP Ports
- 4 SFP Ports
- Memory
- 256 MB
- Rack Units
- 1 RU
- Interface Ports
- 10/100/1000
- Number of Downlink Ports
- 48 Ports
- Port/Expansion Slot Details
- N/A
- Flash Memory
- 256 MB
- Switching Capacity
- 176 Gbps
- Width
- 17.5 inches
- Height
- 1.75 inches
- Depth
- 11.5 inches
- Media Type Supported
- Twisted Pair / Fiber
- Switching Capacity with Stacking
- 352 Gbps
- Power Consumption
- 30 W
- Uplink Configuration
- 1G / 10G
- Weight
- 13 lbs
- Power Source
- DC Power Supply
- Manufacturer Part Number
- EX4300-48T-DC
- Product Name
- EX4300-48T-DC Ethernet Switch
EX4300-48T-DC Use Case
DC-Powered Top-of-Rack Aggregation in Hyperscale Data Centers
In hyperscale and colocation data centers operating on direct-current distribution, deploying the Juniper EX4300-48T-DC as a top-of-rack aggregation switch delivers 48 Gigabit Ethernet ports with a 550W DC power supply. This configuration leverages Virtual Chassis technology and sub-millisecond failover to simplify network fabric, increase uplink density, and ensure continuous operation—reducing operational expenses and elevating service reliability.
Edge Resiliency at Financial Services Branch Offices
For global banks and financial institutions with remote branches powered by DC backup systems, the EX4300-48T-DC ensures high-availability connectivity and robust security enforcement. By combining 48 10/100/1000Base-T ports with built-in MACsec encryption and centralized Junos OS management, organizations achieve PCI-DSS compliance, streamlined provisioning, and 99.999% uptime—safeguarding transactions and customer data.
5G Fronthaul Aggregation in Telecom Central Offices
In carrier central offices aggregating 5G remote radio units over fiber backhaul, the Juniper EX4300-48T-DC provides a high-density, low-latency switching platform powered entirely by DC. Its 550W DC power supply, redundant uplinks and sub-2 ms latency support mission-critical fronthaul transport, accelerate site turn-up, and scale with evolving 5G service demands—unlocking faster deployments and superior user experiences.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| EX4300-48T-DC |  EX4300-32F-DC |  EX4300-32F-DC-TAA |  EX4300-48T |  EX4300-48MP | |
|---|---|---|---|---|---|
| Depth | 11.5 inches | 10.5 inches | 10.7 inches | 17.3 inches | 11 inches |
| Ethernet Technology | 10/100/1000 | 10GbE | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Flash Memory | 256 MB | 256 MB | 256 MB | 256 MB | 256 MB |
| Form Factor | Rack-mount | Rack-mount | Rack-mount | Rack-mount | Rack-mount |
| Height | 1.75 inches | 1.75 inches | 1.73 inches | 1.75 inches | 1.73 inches |
| IOS | LAN Base | IP Lite | IP Lite | LAN Lite | IP Services |
| Interface Ports | 10/100/1000 | N/A | 10/100/1000 | 10/100/1000 | 10/100/1000 |
| Layer Supported | Layer 2 / Layer 3 | Layer 2 / Layer 3 | Layer 2 / Layer 3 | Layer 2 / Layer 3 | Layer 2 / Layer 3 |
| Manageable | Managed | Managed | Managed | Managed | Managed |
| Manufacturer Part Number | EX4300-48T-DC | EX4300-32F-DC | EX4300-32F-DC-TAA | EX4300-48T | EX4300-48MP |
| Media Type Supported | Twisted Pair / Fiber | Fiber | Fiber | Twisted Pair | Twisted Pair / Fiber / Combo |
| Memory | 256 MB | 256 MB | 512 MB | 256 MB | 512 MB |
| Number of Downlink Ports | 48 Ports | 32 Ports | 32 Ports | 48 Ports | 48 Ports |
| Number of Ethernet Ports | 24–48 Ports | 24–48 Ports | N/A | 24–48 Ports | 24–48 Ports |
| POE Support | Non POE | Non POE | Non POE | Non POE | POE+ |
| Port/Expansion Slot Details | N/A | N/A | N/A | 48 x 10/100/1000 RJ45 ports, 4 x 10Gb SFP+ uplink ports | N/A |
| Power Consumption | 30 W | 63W | 70 W | 150W | 435 W |
| Power Source | DC Power Supply | DC Power Supply | DC Power Supply | AC Power Supply | AC Power Supply |
| Product Name | EX4300-48T-DC Ethernet Switch | Juniper Networks EX4300-32F-DC Ethernet Switch | Juniper Networks EX4300-32F-DC-TAA | Juniper Networks EX4300-48T Ethernet Switch | Juniper EX4300-48MP |
| Product Type | Switch | Switch | Switch | Switch | Switch |
| Rack Units | 1 RU | 1 RU | 1 RU | 1 RU | 1 RU |
| Redundant Power Supply Supported | No | No | No | No | Yes |
| SFP Ports | 4 SFP Ports | 32 SFP+ Ports | 32 SFP Ports | 4 SFP Ports | 4 SFP Ports |
| Switching Capacity | 176 Gbps | 640 Gbps | 128 Gbps | 128 Gbps | 1280 Gbps |
| Switching Capacity with Stacking | 352 Gbps | 640 Gbps | 256 Gbps | 320 Gbps | 1280 Gbps |
| Uplink Configuration | 1G / 10G | 10G | 10G | 10G | 10G |
| Weight | 13 lbs | 8.6 lbs | 7.3 lbs | 13.6 lbs | 18 lbs |
| Width | 17.5 inches | 17.5 inches | 17.5 inches | 17.5 inches | 17.5 inches |
Reviews & Ratings
A
Andrew Shaw
4
Stable switching and good uplink capacity.
D
Daniel Collins
4
Reliable access layer performance.
S
Stephen Parker
5
Easy deployment.
V
Victor Lane
4
No complaints.
Questions & Answers
What are the key features of the EX4300-48T-DC switch?
The EX4300-48T-DC offers 48 10/100/1000Base-T ports, a 550W DC power supply, Virtual Chassis stacking, Junos OS, and advanced L2/L3 features in a 1U form factor.
How many ports and speeds does the EX4300-48T-DC support?
The EX4300-48T-DC supports 48 RJ-45 ports at 10/100/1000 Mbps plus four 10GbE SFP+ uplink slots for high-throughput connectivity.
What is the role of the 550W DC power supply in this model?
The integrated 550W DC power module delivers redundant, efficient power for high-availability DC-powered environments with minimal impact on rack space.
Can multiple EX4300-48T-DC switches be stacked?
Yes, EX4300-48T-DC supports Virtual Chassis technology, allowing up to 10 units to be managed as a single logical device for simplified operations.
What is Juniper’s Virtual Chassis on the EX4300-48T-DC?
Virtual Chassis enables unified management, seamless failover, and combined switching capacity by interconnecting up to 10 EX4300-48T-DC switches.
Which operating system runs on the EX4300-48T-DC?
The EX4300-48T-DC runs Junos OS, offering consistent CLI, automation APIs, and advanced routing, security, and QoS features.
What is the switching capacity and forwarding rate?
The EX4300-48T-DC provides a throughput of 176 Gbps and a packet forwarding rate of up to 131 Mpps, supporting line-rate performance.
What power consumption should I expect under full load?
Under maximum load, the EX4300-48T-DC consumes approximately 300 W, with efficiency features to reduce power draw during low traffic periods.
Which Layer 2 and Layer 3 protocols are supported?
The switch supports STP/RSTP/MSTP, VLT, VLANs, OSPF, BGP, RIP, VRRP, policy-based routing, and multicast (PIM, IGMP) for versatile network designs.
How do I configure the DC power input?
Install the switch in a DC-compatible rack, connect negative and positive leads to the 550W DC PSU terminals, then power on and verify via the front panel LED.
What management options are available?
Manage the EX4300-48T-DC via Junos CLI, Junos Space Network Management Platform, SNMP, NETCONF, or Junos PyEZ for scriptable automation.
What security features does the EX4300-48T-DC offer?
It includes MACsec encryption, Dynamic ARP Inspection, DHCP snooping, IP source guard, 802.1X authentication, and ACL-based traffic controls.
What are the environmental and compliance specifications?
The EX4300-48T-DC operates in 0–40 °C, meets NEBS Level 3, FCC Class A, CE, RoHS, and supports front-to-back airflow for data center deployments.
What is the warranty and support policy?
Juniper offers a limited lifetime hardware warranty with next-business-day replacement and 24×7 software support through Juniper Care.
Which optics and transceivers are compatible?
Use Juniper-certified SFP, SFP+ and DAC modules for 1GbE and 10GbE uplinks, including EX-SFP-1GE-T, SFP-10G-SR, and SFP-10G-LR transceivers.
What typical use cases suit the EX4300-48T-DC?
Ideal for enterprise campus access, data center top-of-rack, service provider aggregation, and DC-powered environments requiring high availability.
How do Virtual Chassis and Virtual Chassis Fabric differ?
Virtual Chassis links EX4300 units into one logical switch, while Virtual Chassis Fabric creates a fabric for up to 10 devices with automated fabric provisioning.