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SX350X-12-K9-EU
Cisco SX350X-12-K9-EU 350X 10-Port 10 Gigabit Ethernet Switc...
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SX350X-12-K9-EU is a managed, non-PoE 10 Gigabit Ethernet switch for small-business server and storage connections, with ten dedicated copper network ports and two fixed 10G copper/SFP+ combo uplinks. Each combo uplink provides a choice of copper or fiber rather than an additional independent connection: using both optical interfaces leaves ten copper connections available. The Cisco 350X Series Stackable Managed Switches model combines Layer 2+ functionality with a full-width 1U rack chassis. The discontinued SG350X-12PMV-K9-EU instead offers twelve multigigabit PoE+ access ports for powered endpoints, rather than equivalent 10G copper downlinks. This 12-port 10GBASE-T switch addresses data connections to servers, storage devices, and other switches. Private VLAN support provides isolation between connected devices when their traffic must remain separated within a shared switching environment.
SX350X-12-K9-EU price for new stock is is available on request. Get immediate quote. SX350X-12-K9-EU refurb price is $1,643.25.
Request bulk order quote for SX350X-12-K9-EU for additional pricing. Browse the full Cisco SX350X Switches series or explore all Cisco products.
240 Gbps switching capacity provides internal bandwidth for concurrent traffic, while 178.56 Mpps forwarding handles minimum-size packets. Static IPv4 routing supports 990 routes and 128 IP interfaces for inter-VLAN communication; dynamic routing is not available. IPv6 static routing supports 245 routes and 106 interfaces for dual-stack segmentation. SX350X-12-K9-EU combines 512 MB of memory with 256 MB of flash and a dynamically shared 3 MB packet buffer. The address table accommodates 32000 MAC entries, and 4094 active VLANs separate traffic groups. STP/RSTP/MSTP control Layer 2 loops, while LACP supports eight aggregation groups with eight active ports per group. Browser-based management, SSH, and SNMP provide configuration and monitoring paths, with RADIUS and TACACS+ supporting administrative authentication. Two fans provide active cooling, and the 64.1W maximum system draw establishes the load to include in rack power planning. The embedded management software supports both a full command-line interface and a menu-based CLI for local or remote administration.
ORM Systems offers Cisco SX350X-12-K9-EU new sealed or certified refurbished; refurbished units are inspected and bench-tested for power-on, POST, clean boot, every port linking at rated speed, optics bay recognition, PSU status, and fan status, with firmware verified and configuration wiped to factory default. Specify condition, quantity, and required accessories on the purchase order. ORM warranties are up to 3-year extended for new units and up to 1 year for certified refurbished units, with 30-day returns on every condition, terms apply; Cisco's limited lifetime hardware warranty ends July 31, 2027. Enterprise and volume orders support PO acceptance, Net-30 for government, and RMA with advance replacement, with regional stock and RMA coverage in the UK, EU, US, and MEA.
| Key Specs | Key Spec Values |
|---|---|
Port Configuration | 10 x 10GBASE-T / 2 x 10G copper/SFP+ combo |
Stacking | Hardware stacking / 4 members |
Max Power Draw | 64.1W |
Replaces | SG350XG-2F10-K9-EU / End of sale June 18, 2020 |
Lifecycle Status | End of sale July 30, 2022 |
Replacement PID | C1300-12XT-2X / Via discontinued CBS350-12XT-EU |
When replacing a discontinued SG350XG-2F10-K9-EU, whose end-of-sale date was June 18, 2020, the installed patch plan needs review before selecting the replacement configuration. The older model used dedicated optical connections rather than the same copper-sharing arrangement. Check occupied copper links and fiber connections against the replacement port layout before issuing the PO.
When extending an existing SG350X, SG350XG, or SX350X installation, hybrid hardware stacking permits those model groups within one stack. Ring and chain arrangements use network interfaces for their interconnects rather than a separate stacking bay. For a short direct-attach connection, specify SFP-H10GB-CU1M= and confirm the required interconnect topology before ordering.
When preparing equipment before shipment to a remote site, the dedicated 1G out-of-band management port separates configuration access from production network connections. The front-panel USB Type A slot supports image and configuration transfers during staging. Specify the management connection and the required configuration-transfer method before the equipment order is released.
PoE-powered phones or access points
SX350X-12-K9-EU provides data connectivity without PoE output. Connected phones, cameras, or wireless access points therefore need separate power equipment rather than power supplied by these network ports.
Independent fiber uplinks alongside twelve copper connections
SX350X-12-K9-EU shares two copper connections with its SFP+ interfaces. Current successor C1300-12XT-2X provides twelve 10GE copper ports plus two separate 10G SFP+ ports.
Silent fanless operation
SX350X-12-K9-EU uses two fans rather than fanless cooling. Its acoustic rating reaches 51.8 dB at 50°C, so the chassis is unsuitable where fanless operation is mandatory.
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| SX350X-12-K9-EU |  SX350X-12-K9 |  SX350X-52-K9-EU |  SX350X-12-K9-UK |  SX350X-52-K9-NA | |
|---|---|---|---|---|---|
| Depth | 203 mm | 203 mm | 450 mm | 203 mm | 450 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 | SX350X-12-K9-EU | SX350X-12-K9 | SX350X-52-K9-EU | SX350X-12-K9-UK | SX350X-52-K9-NA |
| Memory | 512 MB | 512 MB | 512 MB | 512 MB | 512 MB |
| Power Consumption | 64.1W | 64.1W | 234.4W | 64.1W | 234.4W |
| Switching Capacity | 240 Gbps | 240 Gbps | 1040 Gbps | 240 Gbps | 1040 Gbps |
| Weight | 2.93 kg | 2.93 kg | 7.29 kg | 2.93 kg | 7.29 kg |
| Width | 440 mm | 440 mm | 440 mm | 440 mm | 440 mm |
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SX350X-12-K9-EU identifies the SX350X-12 managed switch in the 350X family: 12 denotes twelve 10GBASE-T connections, including two copper/SFP+ combo connections. The EU suffix selects the regional ordering variant for the European Union and other designated markets. Those combo connections share their copper and fiber interfaces rather than adding independent ports.
The Cisco 350X series supports a browser-based web UI, full or menu CLI through the console, SSH or Telnet, SNMP, Smart Network Application, FindIT Network Manager, Active Advisor, and an embedded FindIT Network Probe. Network Plug and Play supports provisioning. SX350X-12-K9-EU also has a dedicated Gigabit Ethernet management port for out-of-band access.
SX350X-12-K9-EU is discontinued: end of sale was July 30, 2022, and Cisco's last date of support is July 31, 2027. Software maintenance ended July 30, 2023. Its immediate replacement, CBS350-12XT-EU, is also discontinued; the forward replacement chain reaches the current C1300-12XT-2X model.
SX350X-12-K9-EU replaces SG350XG-2F10-K9-EU, whose end-of-sale date was June 18, 2020. The predecessor offered ten 10GBASE-T copper ports plus two dedicated 10G SFP+ ports; the replacement permits twelve copper connections with two shared SFP+ interfaces. Both models are discontinued, so matching an existing spare requires checking the different physical port arrangements.
Yes, SX350X-12-K9-EU supports hardware stacking with four members, including hybrid stacks of SG350X, SG350XG, and SX350X models. Ring and chain arrangements use 10G fiber or copper interfaces. SFP-H10GB-CU1M=, SFP-H10GB-CU3M=, and SFP-H10GB-CU5M= provide 1 m, 3 m, and 5 m direct-attach cable choices, respectively.
SX350X-12-K9-EU accepts 1G or 10G optics in two SFP+ combo cages, each shared with a copper port. SFP-10G-SR= supports 10G multimode fiber connections, while SFP-10G-LR= supports 10G single-mode links to 10 km. Fiber operation disables the corresponding copper connection, so both media cannot operate simultaneously on that combo port.
SX350X-12-K9-EU supports static IPv4 and IPv6 routing, placing the switch in Layer 2+ rather than dynamic-routing Layer 3. IPv4 capacity is 990 static routes with 128 IP interfaces; IPv6 capacity is 245 static routes with 106 interfaces. Routed interfaces can be physical ports, link aggregation groups, VLAN interfaces, or loopbacks.
Yes, SX350X-12-K9-EU occupies 1U in a full-width rack, measuring 440 mm wide, 44 mm high, and 203 mm deep. Weight is 2.93 kg. Two fans provide active cooling, so rack placement must account for ventilation rather than treating the chassis as a fanless desktop device.
SX350X-12-K9-EU has no PoE output, whereas discontinued SG350X-12PMV-K9-EU provides a 375W shared PoE budget across twelve multigigabit PoE+ access ports, eight supporting 60W. The former fits existing data-only 10G copper connections; the latter belongs to powered-endpoint installations with different access-port speeds and does not provide equivalent 10G downlinks.
SX350X-12-K9-EU offers twelve 10G connections, compared with eight on discontinued SX350X-08-K9-EU; both models have two shared SFP+ interfaces. The larger model accommodates a twelve-connection legacy patch plan. Buyers comparing spare units for smaller installations can match the eight-connection layout while retaining the same shared-fiber arrangement.
C1300-12XT-2X provides twelve 10GE copper ports plus two separate 10G SFP+ ports, whereas SX350X-12-K9-EU shares its two SFP+ interfaces with copper connections. C1300-12XT-2X is the current successor after discontinued CBS350-12XT-EU. The newer model fits buyers needing independent fiber uplinks; the older model fits an existing shared-port spare requirement.
ORM Systems offers SX350X-12-K9-EU new sealed or certified refurbished, with up to a 3-year extended warranty on new units or up to 1 year on refurbished units and 30-day returns on every condition; terms apply. Cisco's limited lifetime hardware warranty is bounded by July 31, 2027. Refurbished managed units are inspected, bench-tested, firmware verified, and factory-reset.
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