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SG350-52-K9
Cisco SG350-52-K9 350 48-Port Gigabit Switch, 2x1G SFP and 2...
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SG350-52-K9 is a managed, non-PoE Gigabit access switch with 48 dedicated copper ports and fixed 1G uplinks comprising two dedicated SFP slots and two copper/SFP combo interfaces. The Layer 2+ feature set and 1U rack-mount chassis suit small-business access networks connecting computers, printers and servers with their own power. Cisco 350 Series controls include guest isolation, access policies and traffic prioritization rather than unmanaged forwarding alone. The discontinued SG350-52P-K9 differs by supplying endpoint power. Copper connections support mixed legacy Ethernet speeds, while fiber interfaces connect access wiring to other network equipment. The Cisco Small Business switch also supports Private VLAN Edge for separating devices within the same VLAN.
SG350-52-K9 price for new stock is $1,061.55, a 2.8% saving from the Cisco list price of $1,092.00. SG350-52-K9 refurb price is $901.95. SG350-52-K9 is in stock and available for next-day dispatch. (terms applied)
Request bulk order quote for SG350-52-K9 for additional pricing. Browse the full Cisco 350 Series Managed Switches series or explore all Cisco products.
104 Gbps switching capacity provides wire-speed, nonblocking forwarding across the built-in interfaces, while 77.38 Mpps forwarding at 64-byte packets defines the packet-rate ceiling. Static routing and PBR support local next-hop control without a dynamic routing protocol. SG350-52-K9 carries 512 MB of DRAM and 256 MB of flash for switch operation and software storage. Its dynamically shared 3 MB packet buffer accommodates traffic bursts across all ports rather than reserving a fixed amount per connection. The MAC table holds 16000 addresses, while eight hardware queues support strict-priority and weighted round-robin scheduling for differentiated traffic. STP, RSTP and MSTP provide loop-control options, and LACP supports link aggregation. Browser configuration and the scriptable Textview CLI offer separate administration workflows. One cooling fan requires an airflow plan, and 40.4W worst-case consumption at 110V AC belongs in the upstream power calculation. Power redundancy must be provided upstream of the fixed internal supply.
ORM Systems offers SG350-52-K9 new sealed or certified refurbished; specify condition and the regional form on the PO. Refurbished units are inspected and bench-tested for power-on, POST, rated-speed links on every port, clean boot and optics bay recognition, with PSU and fan status checked, firmware verified and configuration wiped to factory default. ORM provides up to a 3-year extended warranty on new units, up to 1 year on refurbished units and 30-day returns for either condition, terms apply; Cisco's separate Limited Lifetime warranty is entitlement-dependent and ends October 31, 2026. Enterprise and volume buyers can use POs, Net-30 for government and RMA with advance replacement, with regional stock/RMA in the UK, EU, US and MEA.
| Key Specs | Key Spec Values |
|---|---|
Port Configuration | 48x1G access / 2x1G copper/SFP combo / 2x1G SFP |
Max Power Draw | 40.4W at 110V AC |
Cooling | 1 fan |
Lifecycle Status | End of sale October 30, 2021 |
Replacement PID | C1300-48T-4G |
When a site is consolidating separate departmental switches into one managed access unit, VLAN planning becomes part of the purchase rather than an installation afterthought. Support for 4094 simultaneous VLANs accommodates separate workgroups and guest segments; specify the VLAN plan and required port assignments before issuing the PO.
When an existing router is carrying traffic between local workgroups, the switch can take on internal subnet forwarding while the router retains external traffic and security duties. Support for 128 IP interfaces sets the configuration ceiling; check the required subnet interfaces and gateway design before specifying the order.
For a lab or staging bench preparing replacement equipment, port-mirroring limits affect the test plan. One session can copy traffic from eight source ports to one destination, so concurrent capture requirements need attention. Specify the capture layout, analyzer connection and staged configuration before issuing the PO.
10G uplinks to distribution
SG350-52-K9 provides 1G uplinks only; neither its dedicated SFP slots nor its copper/SFP combo interfaces provide a 10G uplink path.
PoE-powered phones or access points
SG350-52-K9 does not supply endpoint power over Ethernet. Phones, wireless access points and other powered devices need separate power arrangements rather than power from these ports.
Cisco support beyond October 2026
SG350-52-K9 reaches its last support date on October 31, 2026. C1300-48T-4G is the current migration endpoint; the intermediate CBS350-48T-4G-NA is already discontinued.
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| SG350-52-K9 |  SG350-10MP-K9 |  SG350-52P-K9-EU |  SG350-52MP-K9-UK |  SG350-52P-K9-UK | |
|---|---|---|---|---|---|
| Depth | 257 mm | 170 mm | 350 mm | 350 mm | 350 mm |
| Ethernet Technology | Gigabit Ethernet | Gigabit Ethernet | Gigabit Ethernet | Gigabit Ethernet | Gigabit Ethernet |
| Flash Memory | 256 MB | 256 MB | 256 MB | 256 MB | 256 MB |
| Form Factor | Rack-Mount 1U | Desktop | Rack-Mount 1U | Rack-Mount 1U | Rack-Mount 1U |
| Height | 44 mm | 44 mm | 44 mm | 44 mm | 44 mm |
| Manufacturer Part Number | SG350-52-K9 | SG350-10MP-K9 | SG350-52P-K9-EU | SG350-52MP-K9-UK | SG350-52P-K9-UK |
| Memory | 512 MB | 512 MB | 512 MB | 512 MB | 512 MB |
| Power Consumption | 40.4W at 110V AC | 152.8W | 440W | 858W | 440W |
| SFP Ports | 2 x 1GbE / 2 x 1GbE (Combo, shared with RJ-45) | 2 x 1GbE (Combo, shared with RJ-45) | 2 x 1GbE / 2 x 1GbE (Combo, shared with RJ-45) | 2 x 1GbE / 2 x 1GbE (Combo, shared with RJ-45) | 2 x 1GbE / 2 x 1GbE (Combo, shared with RJ-45) |
| Switching Capacity | 104 Gbps | 20 Gbps | 104 Gbps | 104 Gbps | 104 Gbps |
| Weight | 2.75 kg | 1.19 kg | 3.81 kg | 3.83 kg | 3.81 kg |
| Width | 440 mm | 280 mm | 440 mm | 440 mm | 440 mm |
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SG350-52-K9 identifies the Gigabit 350 Series model with 52 usable interfaces: 48 dedicated copper ports, two copper/SFP combo ports and two dedicated SFP ports. SG350 identifies the family, 52 is the interface total, and K9 remains part of the base identifier. SG350-52-K9-NA adds the Americas regional suffix.
SG350-52-K9 supports HTTP/HTTPS browser management, Textview CLI over console or SSH/Telnet, and SNMP 1/2c/3. Network tools include Smart Network Application, FindIT Network Manager with an embedded Probe, FindIT Network Discovery Utility and Cisco Active Advisor; Cisco Network Plug and Play supports provisioning. Treat the network-tool integrations as legacy when planning management.
SG350-52-K9 is discontinued: end of sale was October 30, 2021, and the last date of support is October 31, 2026. Software maintenance ended October 30, 2022. The current migration endpoint is C1300-48T-4G, beyond the discontinued CBS350-48T-4G-NA intermediate replacement.
SG350-52-K9 replaced the discontinued SG300-52 in these regional forms: SRW2048-K9-BR, SRW2048-K9-CN, SRW2048-K9-EU, SRW2048-K9-JP, SRW2048-K9-NA and SRW2048-K9-UK. SG350-52-K9-CN also replaced SF350-48-K9-CN in China. These are historical migration relationships; SG350-52-K9 is itself discontinued, so a new standardization project should follow the forward migration chain.
SG350-52-K9 has four 1G uplink interfaces: two dedicated SFP slots and two copper/SFP combo ports. Each combo interface uses either its copper connector or its SFP slot, not both simultaneously. MGBSX1 and MGBLX1 are supported fiber transceiver choices; select the optic for the fiber type and link distance.
Yes, the Cisco 350 Series supports inter-VLAN forwarding through static IPv4 routing, IPv6 routing and PBR, with 990 static IPv4 routes and 128 IP interfaces. The routing configuration uses static entries rather than a dynamic routing protocol. Size the planned internal subnets and next-hop entries before assigning gateway functions.
SG350-52-K9 uses a fixed internal AC power supply accepting 100-240V AC at 50-60 Hz, with no redundant internal supply option. Worst-case consumption is 40.4W at 110V AC. Include the switch in the upstream power and UPS calculation; an external desktop adapter is not its power input.
SG350-52-K9 requires 1U of rack space and measures 440 mm wide, 44 mm high and 257 mm deep, with one cooling fan. Its 2.75 kg weight and 0°C to 50°C operating range matter when planning rack placement; allow for airflow rather than treating the chassis as fanless.
SG350-52P-K9 adds 48 PoE+ access ports and a shared 375W power budget, while SG350-52-K9 supplies no PoE. Both models are discontinued and retain the same access-port density. SG350-52-K9 suits legacy networks with separately powered endpoints; SG350-52P-K9 addresses legacy endpoint-power requirements within its shared budget.
SG350-52-K9 provides 48 dedicated Gigabit copper access ports, while SG350-28-K9 provides 24; both retain two copper/SFP combo interfaces and two dedicated SFP slots. Both models are discontinued. SG350-52-K9 suits denser legacy access wiring, while SG350-28-K9 fits legacy installations needing fewer dedicated endpoint connections.
C1300-48T-4G provides four dedicated 1G SFP uplinks, while SG350-52-K9 combines two dedicated SFP ports with two copper/SFP combo interfaces. Both offer 48 Gigabit copper access ports. C1300-48T-4G is the current migration endpoint for new standardization; the discontinued SG350-52-K9 remains a legacy replacement or sparing purchase.
ORM Systems offers SG350-52-K9 new sealed or certified refurbished, with up to a 3-year extended warranty for new units and up to 1 year for refurbished units. Returns are 30 days in either condition; terms apply. Cisco's separate Limited Lifetime warranty remains subject to entitlement and ends with support on October 31, 2026.
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