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SX550X-52-K9-UK
Cisco SX550X-52-K9-UK 550X 48-Port 10 Gigabit Ethernet Switc...
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SX550X-52-K9-UK combines 48 copper 10GBase-T access ports with four dedicated 10G SFP+ uplinks in a managed, stackable 1U rack-mount chassis. The Cisco 550X Series Stackable Managed Switches serve small and medium businesses requiring copper connectivity and VLAN-based network segmentation. Layer 2+ operation includes routing capabilities without changing the fixed port architecture. The optical uplinks do not share their positions with copper access ports, allowing both connection types to operate simultaneously. Network interfaces support 10G and 1G connections, while non-PoE operation leaves endpoint power separate from network connectivity. The discontinued SX550X-24-K9-UK offers a smaller configuration with 20 dedicated copper access ports and four copper/SFP+ combo uplink positions.
SX550X-52-K9-UK price is is available on request. Get immediate quote.
Request bulk order quote for SX550X-52-K9-UK for additional pricing. Browse the full Cisco SX550X Switches series or explore all Cisco products.
1040 Gbps switching capacity supports nonblocking switching across the network interfaces. 755.81 Mpps forwarding performance applies to 64-byte packets, providing a packet-rate reference for small-frame workloads. 7168 IPv4 routes accommodate the routing inventory, with Static, RIP v2, VRRP v2, VRRP v3 and PBR available for traffic control. Working memory of 512 MB supports switch operation, while 256 MB of flash provides storage for software and configuration files. SX550X-52-K9-UK shares a 10 MB packet buffer dynamically across its ports rather than assigning that capacity to each interface. STP/RSTP/MSTP support loop-control designs, and LACP supports aggregated connections. The Cisco SX550X-52 also provides browser-based configuration and a scriptable Textview CLI for administrative access. Uplink expansion is limited to the built-in interfaces; the chassis does not accept removable uplink cards.
ORM Systems offers SX550X-52-K9-UK new sealed with up to a 3-year extended warranty or certified refurbished with up to 1 year; both conditions include 30-day returns, terms apply. Certified refurbished units are inspected and bench-tested for power-on and POST, every port linking at rated speed, optics bay recognition, PSU status, fan status and clean boot, with firmware verified and configurations wiped to factory default. Specify condition, quantity and connection accessories on the purchase order for this switch. For enterprise and volume orders, PO is accepted, Net-30 is available for government, and RMA includes advance replacement, with regional stock and RMA coverage across the UK, EU, US and MEA.
| Key Specs | Key Spec Values |
|---|---|
Port Configuration | 48 x 10GBase-T / 4 x 10G SFP+ |
Stacking | Hardware stacking / 8 members |
Max Power Draw | 234.5W at 110V |
Replaces | SG550XG-48T-K9-UK; end of sale June 18, 2020 |
Lifecycle Status | End of sale July 30, 2022 |
Replacement PID | CBS350-48XT-4X-UK discontinued / No current successor |
Before a staged rollout, an operations team may need to test a software change while retaining the prior image. The switch supports two firmware images and a front-panel USB Type-A connection for image and configuration transfer. Specify staging acceptance criteria and the required configuration handover before the purchase order.
When standardizing units across regional sites, suffix selection becomes part of the hardware purchase rather than a shorthand name. The UK ordering group covers the United Kingdom, Saudi Arabia, Qatar, Kuwait, Singapore, Hong Kong and Malaysia. Confirm the destination, supply connection and full regional part number before placing the purchase order.
When an existing VLAN design requires routing to move onto the switch, interface count matters alongside protocol selection. The 550X series supports 256 IP interfaces, including physical, VLAN, link-aggregation and loopback interfaces. Map the intended interface inventory and confirm the routing design before the purchase order.
PoE power for connected endpoints
SX550X-52-K9-UK supplies no PoE. C1300-48P-4X offers 48 Gigabit PoE ports and four 10G SFP+ uplinks, but changes copper access from 10G to Gigabit.
Two internal redundant power supplies
Redundant power for SX550X-52-K9-UK comes from an external RPS2300, not two internal PSU modules. Requirements for redundant supplies inside the chassis require a different switch architecture.
Continuing Cisco software maintenance
SX550X-52-K9-UK stopped receiving software maintenance releases July 30, 2023. CBS350-48XT-4X-UK is also discontinued; the replacement chain ends without a current migration model.
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| SX550X-52-K9-UK |  SX550X-16FT-K9-EU |  SX550X-12F-K9-EU |  SX550X-24FT-K9-EU |  SX550X-24F-K9-NA | |
|---|---|---|---|---|---|
| Depth | 450 mm | 257 mm | 257 mm | 350 mm | 350 mm |
| Ethernet Technology | 10 Gigabit Ethernet | 10 Gigabit Ethernet | 10 Gigabit Ethernet | 10 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 | SX550X-52-K9-UK | SX550X-16FT-K9-EU | SX550X-12F-K9-EU | SX550X-24FT-K9-EU | SX550X-24F-K9-NA |
| Memory | 512 MB | 512 MB | 512 MB | 512 MB | 512 MB |
| Power Consumption | 234.5W | 57.7W | 25.3W | 80.2W | 55.5W |
| Switching Capacity | 1040 Gbps | 320 Gbps | 240 Gbps | 480 Gbps | 480 Gbps |
| Weight | 7.36 kg | 3.79 kg | 3.42 kg | 4.84 kg. | 4.7 kg |
| Width | 440 mm | 440 mm | 440 mm | 440 mm | 440 mm |
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SX550X-52-K9-UK identifies a 550X managed switch with 48 copper 10G ports and four dedicated 10G SFP+ ports. SX550X is the model prefix, 52 is the total network-port count, and UK selects the United Kingdom regional ordering group. K9 remains part of the complete product identifier.
SX550X-52-K9-UK supports an HTTP/HTTPS web interface, Textview CLI through the console, SSH or Telnet, and SNMP versions 1, 2c and 3. The 550X series also supports Smart Network Application, FindIT Network Manager with an embedded Probe, FindIT Network Discovery Utility and Active Advisor. Specify the management approach before staging.
SX550X-52-K9-UK ended Cisco sales on July 30, 2022, and reaches its last date of support on July 31, 2027. Software maintenance ended July 30, 2023. The named replacement, CBS350-48XT-4X-UK, is also discontinued, with sales ending October 29, 2024, and no current migration product named.
ORM Systems offers SX550X-52-K9-UK new sealed with up to a 3-year extended warranty or certified refurbished with up to 1 year. Both conditions have 30-day returns; terms apply. Cisco's separate limited lifetime hardware warranty is bounded by July 31, 2027, when Cisco service ends. Refurbished units are inspected, bench-tested, firmware-verified and factory-reset.
SX550X-52-K9-UK replaces the discontinued SG550XG-48T-K9-UK, whose end-of-sale date was June 18, 2020. The older model's Cisco support ended June 30, 2025. For a replacement purchase, compare the installed configuration and regional identifier before ordering; SX550X-52-K9-UK itself is discontinued and has Cisco support only through July 31, 2027.
550X hardware stacking supports eight members, using 10G fiber or copper links in ring or chain topologies. SFP-H10GB-CU1M, SFP-H10GB-CU3M and SFP-H10GB-CU5M provide 1 m, 3 m and 5 m copper connections. Link aggregation can increase interconnect bandwidth. Budget the ports used for stacking separately from endpoint connections.
SX550X-52-K9-UK uses an internal universal AC supply accepting 100-240V AC; backup power comes from the external RPS2300 rather than a second internal PSU. Worst-case system consumption is 234.5W at 110V and 229.3W at 220V. Include the regional power connection and any external backup-power requirements in the purchase specification.
SX550X-52-K9-UK has four dedicated fixed 10G SFP+ uplinks and no uplink-module bay. SFP-10G-SR supports multimode fiber, while SFP-10G-LR supports single-mode fiber. SFP-H10GB-CU1M, SFP-H10GB-CU3M and SFP-H10GB-CU5M cover copper direct-attach connections. Choose the media and matching far-end connection when preparing the order.
SX550X-52-K9-UK provides non-PoE 10G copper access, while SG550X-48P-K9-UK provides Gigabit PoE+ access with a shared 382W budget. Both models are discontinued. The former fits externally powered 10G endpoints; the latter fits powered Gigabit endpoints. Port-speed requirements therefore need confirmation alongside the endpoint power specification.
SX550X-52-K9-UK has 48 dedicated copper access ports, while SX550X-24-K9-UK has 20 dedicated copper access ports plus four copper/SFP+ combo uplinks. Both are discontinued 10G models. The larger model suits denser copper populations; the smaller suits lower-density installations where the four shared uplink positions are sufficient.
550X routing includes IPv4 static routing, RIP v2, VRRP versions 2 and 3, and Policy-Based Routing. IPv4 capacity reaches 7168 routes with 256 IP interfaces; IPv6 static routing reaches 1792 routes. These capabilities support routed VLAN designs, with protocol selection and interface requirements established before configuration.
The 550X series supports STP, RSTP and MSTP for spanning-tree operation, together with LACP for dynamic link aggregation. RSTP is enabled by default. Link aggregation supports 32 groups, with eight active ports per group and 16 candidate ports for each dynamic group. Match aggregation settings at both connection ends.
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