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SX550X-52-K9-NA
Cisco SX550X-52-K9-NA 550X 48-Port 10 Gigabit Ethernet Switc...
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SX550X-52-K9-NA is a managed Layer 2+ aggregation switch with 48 copper 10 Gigabit Ethernet ports and four dedicated 10G SFP+ uplinks. The fixed fiber interfaces operate independently of the copper connections, without a removable uplink card. This non-PoE, rack-mount 1U model belongs to the Cisco 550X Series and connects servers, network storage, and access-switch aggregation in small and medium business networks. The discontinued SX550X-24-K9-NA provides 24 copper connections with shared SFP+ interfaces instead. Hardware stacking unifies the data, control, and management planes across connected members rather than merely grouping independently administered devices. The copper-heavy configuration serves installations maintaining RJ-45 server and storage connections alongside separate fiber links.
SX550X-52-K9-NA price for new stock is is available on request. Get immediate quote. SX550X-52-K9-NA refurb price is $7,867.63.
Request bulk order quote for SX550X-52-K9-NA for additional pricing. Browse the full Cisco SX550X Switches series or explore all Cisco products.
1040 Gbps switching capacity provides wire-speed, nonblocking forwarding across the installed interfaces. 755.81 Mpps forwarding handles 64-byte packets, where packet rate becomes a separate sizing consideration from link bandwidth. Static routing and RIP v2 support inter-VLAN communication; PBR directs selected traffic, and VRRP v2/v3 provides gateway redundancy. The IPv4 table accommodates 7168 routes, while IPv6 static routing supports 1792 routes and 256 interfaces. SX550X-52-K9-NA has 512 MB of DRAM and 256 MB of flash for control-plane operation and image storage. A 10 MB packet buffer is dynamically shared across ports rather than assigned as a fixed allocation to each interface. STP/RSTP/MSTP provides spanning-tree operation, while LACP aggregates links. DHCP snooping and Dynamic ARP Inspection check address bindings. Cisco 550X Series Stackable Managed Switches provide HTTP/HTTPS administration and Textview CLI access, including remote SSH sessions. Jumbo frames reach 9000 bytes where the connected network uses a matching MTU.
ORM Systems offers SX550X-52-K9-NA new sealed and certified refurbished; refurbished units are inspected and bench-tested, including rated-speed links on every port and optics bay recognition, with firmware verified and configurations wiped to factory default. Specify condition, quantity, and required accessory PIDs before placing the purchase order. ORM coverage is up to a 3-year extended warranty for new units and up to 1 year for certified refurbished units; 30-day returns apply to every condition, terms apply, and Cisco's separate limited lifetime coverage ends July 31, 2027. For enterprise and volume orders, POs are accepted, government buyers receive Net-30, and RMA with advance replacement is available across UK, EU, US, and MEA.
| Key Specs | Key Spec Values |
|---|---|
Port Configuration | 48 x 10GBASE-T / 4 x 10G SFP+ |
Stacking | Hardware stacking / Eight members |
Max Power Draw | 234.5W at 110V |
Replaces | SG550XG-48T-K9-NA; end of sale June 18 2020 |
Lifecycle Status | End of sale July 30 2022 |
Replacement PID | CBS350-48XT-4X-NA discontinued; no current successor |
When consolidating server or storage connections onto copper switching, the installed cable plant determines the attachment plan. Category 6a cabling supports 10 Gigabit connections over distances reaching 100 m. Survey patch panels, permanent links, and endpoint interfaces before specifying the required copper patching on the purchase order.
When extending an existing 550X stack, ring and chain arrangements require an explicit interconnect layout. SFP-H10GB-CU3M provides a 3 m direct-attach connection, and link aggregation can combine stacking interconnects. Reserve the interfaces needed for the chosen topology and specify cable quantities and lengths before issuing the purchase order.
When a replacement requires acceptance testing before installation, dual firmware images support image staging, while port mirroring can send traffic from eight source ports to a destination analyzer port. Secure Copy transfers configuration files. Specify the acceptance configuration, traffic-observation connections, and image requirements before placing the replacement order.
PoE-powered phones or access points
SX550X-52-K9-NA supplies no endpoint power through its copper interfaces. Phones, access points, and other powered devices cannot receive their operating power from these network ports.
Uplinks faster than 10 Gigabit
The four fixed SFP+ interfaces support 10 Gigabit Ethernet as their maximum speed. No removable uplink card can add a faster interface to this chassis.
Two internal redundant power supplies
Power redundancy uses the external Cisco RPS2300 rather than a second internal power-supply bay. An installation requiring two internal redundant supplies cannot use this chassis.
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| SX550X-52-K9-NA |  SX550X-24F-K9-NA |  SX550X-52-K9-UK |  SX550X-12F-K9-EU |  SX550X-24-K9-UK | |
|---|---|---|---|---|---|
| Depth | 450 mm | 350 mm | 450 mm | 257 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-NA | SX550X-24F-K9-NA | SX550X-52-K9-UK | SX550X-12F-K9-EU | SX550X-24-K9-UK |
| Memory | 512 MB | 512 MB | 512 MB | 512 MB | 512 MB |
| Power Consumption | 234.5W | 55.5W | 234.5W | 25.3W | 124.6W |
| Switching Capacity | 1040 Gbps | 480 Gbps | 1040 Gbps | 240 Gbps | 480 Gbps |
| Weight | 7.36 kg. | 4.7 kg | 7.36 kg | 3.42 kg | 5.16 kg |
| Width | 440 mm | 440 mm | 440 mm | 440 mm | 440 mm |
Every unit is authentic, sourced through trusted and authorised channels, and serial-verified on request. Genuine networking and IT hardware, guaranteed, or your money back.
New products are backed by up to 3 years of extended warranty, and certified refurbished units by up to 3 months, for dependable protection on every order. Coverage is clear, honoured in full, and confirmed on each product page.
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Every device is inspected, bench-tested, and firmware-verified, with configurations wiped before dispatch. Additional testing can be arranged to confirm full working condition on request.
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SX550X-52-K9-NA identifies an Americas ordering variant of a 550X managed 10 Gigabit switch. SX550X identifies the 10 Gigabit models, while 52 covers 48 copper ports and four dedicated SFP+ ports. NA serves the United States, Canada, Mexico, Colombia, Chile, and other Latin American markets.
SX550X-52-K9-NA supports an HTTP/HTTPS web interface, Textview CLI over console, SSH or Telnet, and SNMP. Additional tools include Smart Network Application, FindIT Network Manager with an embedded FindIT Network Probe, FindIT Network Discovery Utility, and Active Advisor. Cisco Network Plug and Play supports automated provisioning.
SX550X-52-K9-NA is discontinued: Cisco ended sales on July 30, 2022, and support ends July 31, 2027. Software maintenance ended July 30, 2023. Purchasing remaining new sealed stock does not restart these milestones; deployment and service expectations must account for the fixed support cutoff.
ORM Systems offers SX550X-52-K9-NA new sealed or certified refurbished, with up to a 3-year extended warranty for new units and up to 1 year for refurbished units. Both conditions have 30-day returns; terms apply. Cisco's separate limited lifetime hardware warranty, subject to eligibility, is bounded by the July 31, 2027 support cutoff.
SX550X-52-K9-NA replaced the discontinued SG550XG-48T-K9-NA, whose sales ended June 18, 2020, and Cisco support ended June 30, 2025. The replacement provides 48 copper connections and four dedicated SFP+ interfaces. The older model used shared copper/SFP+ connections, so an existing fiber attachment plan needs review before replacement.
CBS350-48XT-4X-NA was the replacement for SX550X-52-K9-NA, but that replacement is also discontinued and has no current successor in its migration chain. CBS350-48XT-4X-NA ended sales October 29, 2024, with support ending October 31, 2029. The migration chain therefore does not provide a current orderable successor.
SX550X-52-K9-NA has four dedicated fixed 10G SFP+ uplinks, with support for 10G and 1G operation. Supported choices include SFP-10G-SR for multimode fiber, SFP-10G-LR for single-mode fiber, and SFP-H10GB-CU1M for a 1 m direct-attach connection. Specify the connection type and compatible far-end interface separately.
SX550X-52-K9-NA supports hardware stacking with eight members, managed as one system. Compatible stack families include SF550X, SG550X, SG550XG, and SX550X. Standard 10G copper or fiber interfaces carry the interconnects, with ring or chain arrangements and link aggregation available for stacking connections.
SX550X-52-K9-NA provides static routing, RIP v2, PBR, and VRRP v2/v3. IPv4 routing supports 7168 routes and 256 IP interfaces; IPv6 static routing supports 1792 routes and 256 IPv6 interfaces. Routed interfaces can use physical ports, link aggregation groups, VLAN interfaces, or loopback interfaces.
SX550X-52-K9-NA accepts 100-240V AC and draws 234.5W worst case at 110V, or 229.3W at 220V. Cooling uses five operating fans plus one redundant fan, with a 0°C to 50°C operating range. External backup power uses Cisco RPS2300 rather than a second internal supply.
SX550X-52-K9-NA is a rack-mount 1U switch measuring 440 mm wide, 44 mm high, and 450 mm deep, with a 7.36 kg weight. The standard package includes a mounting kit, power cord, and console cable. Confirm rack depth and the required package contents before ordering.
SX550X-52-K9-NA offers 48 non-PoE 10GBASE-T ports; SG550X-48P-K9-NA provides 48 Gigabit PoE+ ports with a 382W shared budget. Both are discontinued. The SX model serves externally powered 10G endpoints, while the SG model serves existing Gigabit powered-endpoint deployments where its aggregate power budget matches the connected load.
SX550X-52-K9-NA provides 48 dedicated copper 10GBASE-T ports, while SX550X-24F-K9-NA provides 24 SFP+ interfaces with four shared copper connections. Both models are discontinued. The copper model serves existing RJ-45 server connections; the fiber model serves legacy optics-heavy installations where the smaller port configuration and shared connections fit the attachment plan.
SX550X-52-K9-NA has 48 copper 10G ports and four separate SFP+ uplinks; SX550X-24-K9-NA has 24 copper 10G ports with four shared SFP+ connections. Both are discontinued. The larger model serves legacy racks needing more copper attachments, while the smaller model fits lower-density replacements where combo connections are acceptable.
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