SG350X-48P-K9 - Cisco 48-Port Gigabit PoE+ Stackable L3 Switch

Cisco Small Business SG350X-48P-K9: 48 Gigabit PoE+ ports, 382W power budget, 4x 10G uplinks, Layer 3 managed stackable switch for SMB networks.

The Cisco SG350X-48P-K9 is a member of the Cisco Small Business 350X Series Stackable Managed Switches. It is a Layer 3 managed switch offering 48 10/100/1000 Gigabit Ethernet ports with PoE+ support and a 382W PoE power budget, alongside 4x 10 Gigabit Ethernet uplinks (2x 10GBase-T/SFP+ combo plus 2x dedicated SFP+). Built for small and medium-sized businesses needing affordable, high-capacity switching, it delivers 176 Gbps switching capacity and 130.94 Mpps forwarding rate. The switch supports true physical stacking of up to four units, advanced Layer 3 static routing, VLANs, ACLs, QoS, and robust security features such as DHCP snooping, IP Source Guard, and dynamic ARP inspection, making it suitable for powering IP phones, wireless access points, and surveillance cameras while managing converged voice, video, and data traffic.

• Manufacturer: Cisco Systems
• Product Family: Cisco Small Business 350X Series Stackable Managed Switches
• Product Series: SG350X
• Model: SG350X-48P
• Product Type: Layer 3 Managed Stackable Switch
• Total Network Ports: 48x 10/100/1000 Gigabit Ethernet
• Uplink Ports: 2x 10GBase-T/SFP+ combo + 2x SFP+ (4x 10 Gigabit Ethernet total)
• PoE Power Budget: 382W (8 ports support up to 60W PoE)
• PoE Standard: IEEE 802.3at PoE+
• Switching Capacity: 176 Gbps
• Forwarding Rate: 130.94 Mpps (64-byte packets)
• Flash Memory: 256 MB
• CPU: 800 MHz
• Packet Buffer: 3 MB
• Active VLANs: Up to 4096
• ACL Entries: Up to 2000
• IPv4 Static Routes: Up to 8000
• IPv6 Static Routes: Up to 6000
• MSTP Instances: 16
• Stacking: True physical stacking, up to 4 units per stack
• Management: Web GUI, CLI, SNMP (v2/v3), Telnet, SSH, RMON, Syslog
• Security: DHCP snooping, IP Source Guard, Dynamic ARP Inspection, IEEE 802.1X, ACLs
• Power Input: 100 to 240V AC, 50 to 60 Hz, internal universal power supply
• Cooling: 3 fans
• Dimensions (W x D x H): 17.3 x 17.7 x 1.7 in (440 x 450 x 44 mm approx.)
• Weight: 12.83 lb (5.82 kg)
• Operating Temperature: 32°F to 122°F (0°C to 50°C)
• Storage Temperature: -4°F to 158°F (-20°C to 70°C)
• Operating/Storage Humidity: 10% to 90%, non-condensing
• Certifications: UL 60950, CSA 22.2, FCC Part 15 Class A, CE Mark
• Warranty: Limited lifetime with next-business-day advance replacement (where available)

• 48 Gigabit Ethernet ports with PoE+ support delivering up to 30W per port
• 382W total PoE power budget with 8 ports supporting up to 60W PoE
• 4x 10 Gigabit Ethernet uplinks (2x 10GBase-T/SFP+ combo + 2x SFP+)
• 176 Gbps switching capacity and 130.94 Mpps forwarding rate
• Layer 3 static routing, VLAN segmentation, and ACL support
• True physical stacking for up to 4 units for simplified scalability
• Smart Port technology for auto-detection and configuration of attached devices
• Advanced security including DHCP snooping, IP Source Guard, and Dynamic ARP Inspection
• Energy Efficient Ethernet (IEEE 802.3az) for reduced power consumption
• Dual firmware image support for reduced downtime during upgrades
• Web-based GUI and command-line interface (CLI) for flexible management
• IPv6 support including dual-stack IPv4/IPv6 operation

Designed for SMB access and aggregation layer deployments requiring high-density PoE and 10G uplink connectivity.

• Powering VoIP phone deployments across office floors via PoE+
• Connecting and powering wireless access points for enterprise Wi-Fi coverage
• Supporting IP surveillance camera networks with centralized PoE power
• Providing high-speed 10G uplinks to servers, NAS, or core switches
• Building stacked switch clusters for scalable branch office networks
• Segmenting traffic with VLANs for voice, data, and security systems
• Serving as an aggregation switch in retail, hospitality, and education environments

• High-density PoE+ powers many device types
• 10G uplinks eliminate network bottlenecks
• Stacking simplifies growth and management
• Layer 3 routing improves traffic segmentation
• Robust security protects business networks
• Lifetime warranty reduces ownership risk

• Form Factor: 1U rack-mountable
• Dimensions (W x D x H): 17.3 x 17.7 x 1.7 in
• Weight: 12.83 lb (5.82 kg)
• Cooling: 3 internal fans

Per available documentation, this product is validated for use and stacking within the Cisco 350X Series and supports the following environments:

• Cisco SG350X-48 (non-PoE variant, same platform family)
• Cisco SG350X-48MP (higher PoE budget variant)
• Cisco SG350X-24P (24-port PoE+ variant)
• Cisco SG350X-24MP
• Cisco SG350X series stacking members (up to 4 units)
• Standard IEEE 802.3at PoE+ powered devices (IP phones, APs, cameras)
• SFP+ transceiver modules and 10GBase-T copper modules for uplinks
• Cisco Small Business switch management ecosystem (web GUI/CLI tools)

Note: Stacking compatibility is limited to other Cisco 350X Series switches; the 350X Series has reached End-of-Sale status per Cisco's official EoL bulletin, and successor Cisco Business/Catalyst switch series are recommended for new deployments.

• 1x Cisco SG350X-48P-K9 switch
• 1x AC power cord
• 1x Console cable

Q: What is the PoE power budget of the Cisco SG350X-48P-K9?

A: The switch provides a total PoE+ power budget of 382W, with 8 of the 48 ports capable of delivering up to 60W each for high-power devices.

Q: How many 10 Gigabit uplink ports does the SG350X-48P-K9 have?

A: It includes 4 10 Gigabit Ethernet uplink ports: 2 combo 10GBase-T/SFP+ ports and 2 dedicated SFP+ fiber ports.

Q: Can the SG350X-48P-K9 be stacked with other switches?

A: Yes, it supports true physical stacking with other Cisco 350X Series switches, allowing management of up to 4 units as a single logical switch.

Q: What is the switching capacity and forwarding rate of this switch?

A: The SG350X-48P-K9 delivers 176 Gbps of switching capacity and a forwarding rate of 130.94 Mpps for 64-byte packets.

Q: Is the Cisco SG350X-48P-K9 still available for purchase from Cisco?

A: No, Cisco announced End-of-Sale for the entire 350X Series Stackable Managed Switches, with the last day to order affected products being July 30, 2022; units are now available primarily through resellers and refurbished channels.

Q: What management options are supported on the SG350X-48P-K9?

A: The switch supports management via a web-based GUI, command-line interface (CLI), SNMP (v2/v3), SSH, Telnet, and RMON/Syslog for monitoring and configuration.

Q: What security features are included on this switch?

A: It includes DHCP snooping, IP Source Guard, Dynamic ARP Inspection, IEEE 802.1X authentication, and Access Control Lists (ACLs) to protect network traffic.

Q: What is the operating temperature range for the SG350X-48P-K9?

A: The switch is rated for operation between 32°F and 122°F (0°C to 50°C) with 10-90% non-condensing humidity.