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SG350-28SFP-K9-UK
Cisco SG350-28SFP-K9-UK 350 24-Port Gigabit SFP Switch, 2x1G...
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SG350-28SFP-K9-UK concentrates Gigabit fiber connectivity in a managed Layer 2+ switch for small-business networks. The fixed configuration provides 24 Gigabit SFP access slots, two dedicated Gigabit SFP uplinks, and two Gigabit copper/SFP combo uplinks. Each combo connection uses either its copper interface or its SFP interface, giving the chassis 28 simultaneously usable network ports. The Rack-Mount 1U enclosure belongs to the Cisco 350 Series Managed Switches and accommodates fiber-connected switches or endpoints rather than a bank of copper access connections. The discontinued SG350-28P-K9-UK differs materially: its 24 copper access ports deliver PoE+, whereas this fiber model supplies no endpoint power. This 28-port Gigabit managed SFP switch uses fixed interfaces rather than removable uplink cards, so the required connection media must be selected within that architecture.
SG350-28SFP-K9-UK price is is available on request. Get immediate quote.
Request bulk order quote for SG350-28SFP-K9-UK for additional pricing. Browse the full Cisco 350 Series Managed Switches series or explore all Cisco products.
56 Gbps switching capacity provides the switching fabric for the complete port configuration. 41.66 Mpps forwarding at 64-byte packet size supports wire-speed packet handling. 990 static IPv4 routes provide inter-VLAN forwarding without dynamic routing adjacencies, while PBR can direct matching traffic to selected next hops. The 16000-entry MAC table accommodates learned Ethernet addresses independently of those routing entries. SG350-28SFP-K9-UK includes 512 MB of DRAM and 256 MB of flash for its embedded management software and stored files; a shared 1.5 MB packet buffer serves traffic across the ports. Administrators can use the browser interface, a scriptable CLI, or SNMP, with HTTPS and SSH available for protected management sessions. Dual software images provide separate image storage for maintenance. 34.3W worst-case consumption at 220V AC establishes the upper published system-load figure for electrical planning. One cooling fan moves air through the enclosure, and the 0°C to 50°C operating range sets the ambient-temperature boundary for installation.
Specify SG350-28SFP-K9-UK quantities and new sealed or certified refurbished condition on the purchase order. Certified refurbished units are inspected and bench-tested for power-on and POST, rated-speed links on every port, optics bay recognition, PSU status, fan status, and clean boot; firmware is verified and configurations are wiped to factory default. 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 eligible limited lifetime hardware warranty ends July 31, 2027. Enterprise and volume orders can use accepted POs, government Net-30, and RMA with advance replacement across UK, EU, US, and MEA.
| Key Specs | Key Spec Values |
|---|---|
Port Configuration | 24x1G SFP access / 2x1G SFP uplinks / 2x1G combo |
Max Power Draw | 34.3W at 220V AC |
Cooling | 1 fan |
Replaces | SG300-28SFP-K9-UK; end-of-sale October 4, 2018 |
Lifecycle Status | End-of-sale July 30, 2022 |
Replacement PID | CBS350-24S-4G-UK discontinued; no current direct successor |
When replacing the discontinued SG300-28SFP-K9-UK, whose end-of-sale date was October 4, 2018, the named migration model preserves a fiber-oriented purchasing requirement. Treat the migration as a configuration and optics review rather than an assumption of interchangeable settings. Check existing transceiver identities and interface assignments before specifying the replacement order.
When adding local routing between business network segments, the limit of 128 IP interfaces becomes a sizing consideration separate from physical port availability. Count planned physical, VLAN, loopback, and link-aggregation interfaces against that ceiling. Specify the required interface layout and next-hop configuration before committing the purchase order.
When purchasing switches for multiple locations, text-editable configuration files and a scriptable CLI provide a repeatable staging method. CLI privilege levels 1, 7, and 15 allow differentiated administrator access. Establish the configuration file, administrator privilege assignments, and site-specific settings before specifying quantities and preparing the staging purchase order.
10G uplinks to upstream switches
SG350-28SFP-K9-UK provides Gigabit SFP and copper/SFP uplinks, not 10G interfaces. Installing a different transceiver cannot convert these fixed connections into 10G uplinks or add an uplink card bay.
Switch-delivered power for connected endpoints
SG350-28SFP-K9-UK does not supply PoE through its copper connections. Phones, cameras, or wireless access points requiring switch-delivered power need a PoE-capable switch or an independent power source.
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| SG350-28SFP-K9-UK |  SG350-52 |  SG350-10SFP-K9-NA |  SG350-52-K9-EU |  SG350-52-K9-UK | |
|---|---|---|---|---|---|
| Depth | 203 mm | 257 mm | 170 mm | 257 mm | 257 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 | Rack-Mount 1U | Desktop | Rack-Mount 1U | Rack-Mount 1U |
| Height | 44 mm | 44 mm | 44 mm | 44 mm | 44 mm |
| Manufacturer Part Number | SG350-28SFP-K9-UK | SG350-52 | SG350-10SFP-K9-NA | SG350-52-K9-EU | SG350-52-K9-UK |
| Memory | 512 MB | 512 MB | 512 MB | 512 MB | 512 MB |
| Power Consumption | 34.3W | 40.4W at 110V AC | 11.9W | 40.4W at 110V AC | 40.4W at 110V AC |
| SFP Ports | 26 x 1GbE / 2 x 1GbE (Combo, shared with RJ-45) | 2 x 1GbE / 2 x 1GbE (Combo, shared with RJ-45) | 8 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 | 56 Gbps | 104 Gbps | 20 Gbps | 104 Gbps | 104 Gbps |
| Weight | 2.7 kg | 2.75 kg | 2.08 kg | 2.75 kg | 2.75 kg |
| Width | 440 mm | 440 mm | 279.4 mm | 440 mm | 440 mm |
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SG350-28SFP-K9-UK identifies a Cisco 350 Series Gigabit managed SFP switch with 28 network ports. The 28SFP configuration contains 24 SFP access slots and four additional uplink connections. K9 remains part of the complete ordering identity; UK selects the regional variant covering the United Kingdom and several additional markets.
SG350-28SFP-K9-UK supports an HTTP/HTTPS web interface, full or menu-based CLI through console, SSH or Telnet, and SNMP versions 1, 2c, and 3. Additional management options include Smart Network Application, FindIT Network Manager with an embedded probe, Cisco Active Advisor, and provisioning through Cisco PnP Connect.
SG350-28SFP-K9-UK reached end-of-sale on July 30, 2022, and its last date of Cisco support is July 31, 2027. Software maintenance releases ended July 30, 2023. Purchases therefore need a remaining-support assessment rather than treating new sealed stock as a currently manufactured Cisco product.
ORM Systems offers SG350-28SFP-K9-UK new sealed or certified refurbished, with up to 3-year extended warranty for new units and up to 1 year for refurbished units. Returns are 30 days for every condition; terms apply. Cisco's limited lifetime hardware warranty is subject to eligibility and ends with Cisco service on July 31, 2027.
SG350-28SFP-K9-UK replaces the discontinued SG300-28SFP-K9-UK, which reached end-of-sale on October 4, 2018. The migration retains a Gigabit SFP purchasing requirement, but existing configurations and optics still need review. SG350-28SFP-K9-UK is also discontinued, so that historical replacement relationship does not identify a current-generation purchase.
The Cisco 350 Series SFP switch supports MGBSX1 for multimode fiber to 500 m, MGBLX1 for single-mode fiber to 10 km, and MGBLH1 for single-mode fiber to 40 km. Select the transceiver PID against fiber type, link distance, and the equipment at the opposite end.
Yes, SG350-28SFP-K9-UK supports static IPv4 routing with 990 routes and 128 IP interfaces, plus PBR. Routing interfaces can use physical ports, link aggregation, VLAN interfaces, or loopbacks. Its Layer 2+ capabilities suit configured next-hop routing rather than a requirement for dynamic routing protocol adjacencies.
SG350-28SFP-K9-UK uses an internal universal AC power supply accepting 100-240V AC at 50-60 Hz, without a second redundant supply. Worst-case system consumption is 32W at 110V and 34.3W at 220V. Specify the appropriate regional power connection and assess power continuity outside the switch chassis.
The 28-port Gigabit managed SFP switch can use 28 network connections simultaneously: 24 SFP access connections, two dedicated SFP uplinks, and two combo uplinks. Each combo uplink activates either copper or SFP, not both. The additional copper connectors therefore do not increase the simultaneous network-port total.
SG350-28P-K9-UK supplies PoE+ through 24 copper access ports with a 195W shared budget, whereas SG350-28SFP-K9-UK has fiber access slots and no PoE output. Both models are discontinued. The former fits legacy powered-copper requirements; the latter fits legacy fiber connectivity without switch-delivered endpoint power.
SG350-28SFP-K9-UK uses an internal AC supply, while SG350-10SFP-K9-UK uses an external AC adapter and provides fewer fiber connections. Both models are discontinued. The larger model fits legacy rack installations with integrated power; the smaller model fits legacy desktop requirements where a separate adapter is acceptable.
SG350-52-K9-UK provides 52 network ports, including 48 copper access ports, compared with 28 network ports on SG350-28SFP-K9-UK. Both models are discontinued, and the access media differs materially. The higher-density model fits legacy copper connection requirements; the SFP model fits legacy fiber-oriented installations instead.
CBS350-24S-4G-UK is the named replacement for SG350-28SFP-K9-UK, but CBS350-24S-4G-UK is also discontinued and has no current direct successor. Its end-of-sale date was May 30, 2024, with support ending May 31, 2029. The replacement preserves 24 SFP access ports and four Gigabit SFP uplinks.
United States
