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SG350X-48P-K9-UK
Cisco SG350X-48P-K9-UK 350X 48-Port Gigabit PoE+ Switch, 4x1...
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SG350X-48P-K9-UK provides managed Layer 2+ switching through 48 Gigabit Ethernet PoE+ access ports and four fixed 10G uplinks. Two uplinks have dedicated SFP+ cages; the other two offer a choice between copper and SFP+, with only one connection active per shared port. The full-width 1U chassis belongs to the Cisco 350X Series Stackable Managed Switches, serving small-business networks that combine powered endpoints with faster connections toward upstream equipment. Its access interfaces remain Gigabit Ethernet regardless of the uplink media selected. The discontinued SG350X-48MP-K9-UK differs principally through its larger endpoint power allocation, providing a same-generation comparison for buyers matching an existing installation rather than selecting a current-generation replacement.
SG350X-48P-K9-UK price for new stock is is available on request. Get immediate quote. SG350X-48P-K9-UK refurb price is $733.09.
Request bulk order quote for SG350X-48P-K9-UK for additional pricing. Browse the full Cisco SG350X Switches series or explore all Cisco products.
176 Gbps switching capacity supports simultaneous traffic across the fixed interfaces, while 130.94 Mpps forwarding performance describes processing of minimum-size packets. 382W of shared PoE output requires allocation across connected devices rather than assuming maximum power on every port. Static IPv4 and IPv6 routing permits communication between locally configured networks, with 990 IPv4 static routes and 128 IP interfaces available; dynamic routing is not supported. SG350X-48P-K9-UK accommodates 16000 MAC entries for learned endpoint addresses. Its 512 MB memory and 256 MB flash support the embedded switching software and configuration storage, while a dynamically shared 3 MB packet buffer absorbs traffic bursts. DHCP snooping and Dynamic ARP Inspection provide controls for untrusted access connections. Browser configuration and a scriptable CLI offer interactive administration, while SNMP integrates monitoring with an existing management system. Three fans provide active cooling, so installation planning must account for airflow and operating noise rather than treating the chassis as fanless.
Specify SG350X-48P-K9-UK as new sealed or certified refurbished, and confirm the power cord, mounting kit and required accessories on the purchase order. Certified refurbished units are inspected and bench-tested, with PoE output verified under load on every powered port, firmware verified, and configurations wiped to factory default. ORM provides up to a 3-year extended warranty on new units and up to 1 year on certified refurbished units, plus 30-day returns on every condition, terms apply; Cisco's limited lifetime hardware warranty is bounded by October 31, 2026, the last date of support. For enterprise and volume orders, PO is accepted, Net-30 is available for government, and RMA includes advance replacement, with regional stock and RMA across the UK, EU, US and MEA.
| Key Specs | Key Spec Values |
|---|---|
Port Configuration | 48 x 1G PoE+ / 4 x 10G uplinks |
PoE Budget | 382W shared |
Stacking | Hardware stacking / 4 members |
Replaces | SF550X-48P-K9-UK / end of sale June 18, 2020 |
Lifecycle Status | End of sale October 30, 2021 |
Replacement PID | C1300-48P-4X |
When an endpoint rollout includes devices requiring more than standard PoE+ output, eight access ports can supply 60W each. Those connections do not remove the shared power limit across the chassis. Match each device to an appropriate powered port and prepare the complete endpoint allocation before the purchase order.
When extending an existing hardware stack, the 350X family permits mixed SG350X, SG350XG and SX350X members. Ring and chain connections use 10G copper or fiber interfaces rather than a separate stacking module. Confirm the existing member types and reserve interconnect ports before specifying the remaining upstream connections.
When several locations require a repeatable configuration, text-editable configuration files and secure SCP transfer support preparing switches from a common starting point. The embedded Network Plug and Play agent also supports provisioning workflows. Establish the configuration template, device-specific settings and provisioning method before ordering the site quantities.
Multigigabit speeds at every endpoint
The 48 access interfaces stop at Gigabit Ethernet. The 10G connections are uplinks, so their speed cannot provide 2.5G or 5G service on the access ports.
Cisco service beyond October 2026
Cisco service for this discontinued model ends October 31, 2026. C1300-48P-4X is the current endpoint of its replacement chain; the intervening CBS350-48P-4X-UK is also discontinued.
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| SG350X-48P-K9-UK |  SG350X-48P-K9 |  SG350X-24-K9-EU |  SG350X-24-K9 |  SG350XG-24T-K9-NA | |
|---|---|---|---|---|---|
| Depth | 350 mm | 350 mm | 257 mm | 257 mm | 450 mm |
| Ethernet Technology | Gigabit Ethernet | Gigabit Ethernet | Gigabit Ethernet | Gigabit Ethernet | 10 Gigabit Ethernet |
| Flash Memory | 256 MB | 256 MB | 256 MB | 256 MB | 256 MB |
| Form Factor | Rack-Mount 1U | Rack-Mount 1U | Rack-Mount 1U | Rack-Mount 1U | Rack-Mount 1U |
| Height | 44 mm | 44 mm | 44 mm | 44 mm | 44 mm |
| Manufacturer Part Number | SG350X-48P-K9-UK | SG350X-48P-K9 | SG350X-24-K9-EU | SG350X-24-K9 | SG350XG-24T-K9-NA |
| Memory | 512 MB | 512 MB | 512 MB | 512 MB | 512 MB |
| Power Consumption | 492.3W | 492.3W | 32.6W | 32.6W | 146.7W |
| Switching Capacity | 176 Gbps | 176 Gbps | 128 Gbps | 128 Gbps | 480 Gbps |
| Weight | 5.82 kg | 5.82 kg | 4.32 kg. | 4.32 kg | 5.57 kg |
| Width | 440 mm | 440 mm | 440 mm | 440 mm | 440 mm |
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SG350X-48P-K9-UK identifies the Gigabit 350X stackable model with 48 powered access ports. The 48P portion distinguishes the PoE model, while UK selects the regional version for the United Kingdom and several additional markets. Retain the complete K9-UK ending when matching an existing purchase requirement.
SG350X-48P-K9-UK supports an HTTP/HTTPS web interface, console or SSH/Telnet CLI, SNMP versions 1, 2c and 3, Smart Network Application, FindIT Network Manager and Active Advisor. An embedded FindIT Network Probe supports network discovery. Browser configuration offers simple and advanced modes, while the CLI supports full and menu interfaces.
SG350X-48P-K9-UK is discontinued: its end-of-sale date was October 30, 2021, and its last date of support is October 31, 2026. Software maintenance releases ended October 30, 2022. These are separate milestones, so remaining hardware support does not mean that ongoing software maintenance is available.
ORM Systems offers SG350X-48P-K9-UK new sealed with up to a 3-year extended warranty, or certified refurbished with up to 1 year. Returns are 30 days on every condition; terms apply. Cisco's limited lifetime hardware warranty is bounded by the last date of support, October 31, 2026.
SG350X-48P-K9-UK replaces the discontinued SF550X-48P-K9-UK, whose end-of-sale date was June 18, 2020. The older switch has 48 Fast Ethernet PoE access ports, while the replacement provides Gigabit access. SG350X-48P-K9-UK is itself discontinued, so this relationship describes an earlier migration rather than the current purchasing endpoint.
SG350X-48P-K9-UK provides a shared 382W PoE budget across 48 powered access ports. Eight ports support 60W output, while the other powered ports support 30W each. These per-port limits do not represent simultaneous availability across the entire chassis; the combined allocation must remain within the shared budget.
SG350X-48P-K9-UK has two dedicated 10G SFP+ uplinks and two 10G copper/SFP+ combo uplinks, with one medium active per combo port. SFP-10G-SR= supports multimode fiber and SFP-10G-LR= supports single-mode fiber. Order the required transceivers separately and match their media to the installed cabling and far-end connection.
Cisco 350X hardware stacking supports four members managed as one system through a single IP address. Interconnects use 10G copper or fiber interfaces, and mixed SG350X, SG350XG and SX350X stacks are supported. Compatible direct-attach choices include SFP-H10GB-CU1M= and SFP-H10GB-CU3M=; reserve the necessary interfaces when planning uplinks.
The Cisco 350X series supports static IPv4 and IPv6 routing, including 990 IPv4 static routes and 128 IP interfaces. IPv6 capacity reaches 245 static routes and 106 interfaces. Routing interfaces can use physical ports, link aggregation groups, VLAN interfaces or loopbacks; this is static routed access rather than dynamic routing.
The 48-port Gigabit PoE+ SG350X-48P model occupies 1U in a full-width rack installation. Its chassis measures 440 mm wide, 44 mm high and 350 mm deep, and weighs 5.82 kg. A mounting kit is included in the standard package; confirm mounting hardware with the selected condition before ordering.
Cisco SG350X-48P uses an internal universal AC supply accepting 100-240V AC at 47-63 Hz, without an internal redundant supply option. Worst-case consumption including PoE reaches 492.3W at 110V or 481.5W at 220V. Use the input-voltage-specific figure when sizing the electrical circuit and upstream power protection.
SG350X-48P-K9-UK supplies a shared 382W PoE budget, whereas SG350X-48MP-K9-UK supplies 740W. Both are discontinued 48-port powered models, so this comparison concerns matching existing equipment. The P version suits lower aggregate endpoint demand; the MP version accommodates a larger validated allocation without implying unrestricted maximum power on every port.
SG350X-48P-K9-UK provides 48 powered Gigabit access ports, while SG350X-24P-K9-UK provides 24. Both models are discontinued. The 48-port model suits an existing requirement for higher connection density in one chassis; the 24-port model suits a smaller connection count when maintaining the same older switching family.
C1300-48P-4X is the current endpoint of the replacement chain for discontinued SG350X-48P-K9-UK. The intermediate CBS350-48P-4X-UK is also discontinued, so it is not the current migration destination. SG350X-48P-K9-UK suits approved installed-base matching; C1300-48P-4X is the successor to evaluate for a new refresh purchase.
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