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SG550X-48P-K9-EU
Cisco SG550X-48P-K9-EU 550X 48-Port Gigabit PoE+ Switch, 4x1...
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SG550X-48P-K9-EU provides managed Layer 2+ access through 48 Gigabit PoE+ ports and four fixed 10G uplink interfaces in a rack-mount chassis. The 550X family serves small and medium business networks connecting powered endpoints alongside ordinary Ethernet devices. Cisco SG550X-48P offers Gigabit access rather than multigigabit downlinks, so endpoint connection requirements should determine its place on the purchase order. The discontinued SG550X-48MP-K9-EU carries a larger 740W PoE allocation, distinguishing the higher-power sibling from this configuration. Both belong to a discontinued generation; matching an installed configuration and selecting hardware for a new long-term standard are separate purchasing decisions. Specify the complete regional part number rather than the abbreviated model name when matching an existing inventory record.
SG550X-48P-K9-EU price is is available on request. Get immediate quote.
Request bulk order quote for SG550X-48P-K9-EU for additional pricing. Browse the full Cisco 550X Series Stackable Managed Switches series or explore all Cisco products.
176 Gbps switching capacity and 130.94 Mpps forwarding provide the standalone performance figures for traffic sizing. 382W of shared PoE power requires an endpoint allocation plan rather than an assumption that every powered port can operate at its individual maximum simultaneously. Static routing, RIP v2, PBR and VRRP provide inter-VLAN forwarding and gateway-control functions within the switch's routing scope. SG550X-48P-K9-EU carries 512 MB of memory and 256 MB of flash, while a 3 MB packet buffer is shared across its ports. STP, RSTP, MSTP and LACP support loop control and aggregated connections. Power redundancy uses an external RPS2300 system rather than a second internal supply, so an internal redundant-PSU requirement cannot be met by adding another supply module.
Specify SG550X-48P-K9-EU in new sealed or certified refurbished condition, together with the required quantity and connection accessories. Certified refurbished units are inspected and bench-tested, every powered port has PoE output verified under load, and managed units have firmware verified and configurations wiped to factory default. ORM warranties are up to a 3-year extended warranty for new units and up to 1 year for certified refurbished units; returns are 30 days on every condition, terms apply, while Cisco's separate limited lifetime coverage is bounded by July 31, 2027. For enterprise and volume orders, PO accepted, Net-30 for government and RMA with advance replacement apply, with regional stock/RMA coverage across UK, EU, US and MEA.
| Key Specs | Key Spec Values |
|---|---|
Port Configuration | 48 x 1G PoE+ / 4 x 10G uplinks |
PoE Budget | 382W shared |
Stacking | True stacking / eight members |
Replaces | SF550X-48P-K9-EU / end-of-sale June 18, 2020 |
Lifecycle Status | End-of-sale July 30, 2022 |
Replacement PID | C1300-48P-4X / intermediate CBS350-48P-4X-EU discontinued |
When replacing an installed SF550X-48P-K9-EU, this model follows the replacement relationship for the older 48-port Fast Ethernet PoE switch. Treat the change as an existing-estate refresh, not a current-generation standardization exercise. Match regional ordering details and confirm the required support horizon before issuing the PO.
When an endpoint rollout includes higher-draw devices, 16 ports support 60W PoE while the remaining powered ports support 30W individually. Those port limits do not remove the shared power ceiling. Identify endpoint compatibility, assign high-draw connections deliberately and complete the power allocation before ordering.
When an existing 550X installation needs replacement inventory, the July 31, 2027 last date of support sets a purchasing boundary independent of hardware availability. Separate short-horizon sparing from future refresh procurement. Specify the required quantity and condition against the installation's retirement schedule before releasing the PO.
Cisco support beyond July 2027
Cisco support ends July 31, 2027. For a current-generation purchase, evaluate C1300-48P-4X, which follows the discontinued intermediate CBS350-48P-4X-EU in the replacement chain.
Maximum PoE across every access port
The shared 382W allocation cannot supply 30W simultaneously to all 48 access ports. Specify a switch whose total power allocation covers the complete endpoint requirement.
Four simultaneous copper 10G uplinks
Only two uplink interfaces offer copper 10G connections, sharing their interfaces with SFP+ cages. The other two uplinks are dedicated SFP+ connections, not additional copper ports.
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| SG550X-48P-K9-EU |  SG550XG-24T-K9 |  SG550XG-8F8T-K9 |  SG550XG-24F-K9-NA |  SG550X-24P-K9-EU | |
|---|---|---|---|---|---|
| Depth | 350 mm | 450 mm | 350 mm | 350 mm | 350 mm |
| Ethernet Technology | Gigabit Ethernet | 10 Gigabit Ethernet | 10 Gigabit Ethernet | 10 Gigabit Ethernet | 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 | SG550X-48P-K9-EU | SG550XG-24T-K9 | SG550XG-8F8T-K9 | SG550XG-24F-K9-NA | SG550X-24P-K9-EU |
| Memory | 512 MB | 512 MB | 512 MB | 512 MB | 512 MB |
| Power Consumption | 494.3W | 143.9W | 84.6W | 77.5W | 269.2W |
| Switching Capacity | 176 Gbps | 480 Gbps | 320 Gbps | 480 Gbps | 128 Gbps |
| Weight | 5.82 kg | 6.38 kg | 5.23 kg | 4.16 kg | 4.72 kg |
| Width | 440 mm | 440 mm | 440 mm | 440 mm | 440 mm |
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SG550X-48P-K9-EU identifies the regional ordering configuration of a 550X Gigabit stackable switch with 48 PoE+ access ports. SG550X identifies the model family, 48 the access-port quantity and P the powered configuration. EU identifies the regional ordering group; retain K9 when matching the complete purchase-order identifier.
SG550X-48P-K9-EU supports an HTTP/HTTPS web interface, Textview CLI through console, SSH or Telnet, and SNMP. Network management options include Smart Network Application, FindIT Network Manager with an embedded FindIT Network Probe, and Active Advisor. FindIT Network Discovery assists discovery, while Network Plug and Play supports provisioning.
SG550X-48P-K9-EU provides a shared 382W PoE budget across 48 powered access ports. Sixteen ports support 60W individually, while the other powered ports support 30W individually. The total allocation remains the controlling limit, so endpoint power requirements must be checked collectively rather than only against individual port ratings.
The Cisco 550X configuration provides two dedicated 10G SFP+ uplinks and two 10G copper/SFP+ combo interfaces. Each combo interface activates either its copper connection or its optical connection, not both simultaneously. Supported optical choices include SFP-10G-SR for multimode fiber and SFP-10G-LR for single-mode fiber.
SG550X-48P-K9-EU supports a hardware stack of eight members, managed as one system. Stacking uses 10G copper or fiber connections and supports ring or chain arrangements. Reserve the necessary interconnect interfaces before assigning uplinks, and specify the required interconnect media and lengths on the purchase order.
SG550X-48P-K9-EU supports static routing, RIP v2, PBR and VRRP, with an IPv4 capacity of 7168 routes. The switch also supports 256 IPv4 interfaces. These capabilities cover local routing and gateway-control requirements; match the actual routing design to these functions rather than assuming an enterprise routing feature set.
SG550X-48P-K9-EU is discontinued, with end-of-sale on July 30, 2022 and last support on July 31, 2027. Software maintenance ended July 30, 2023. Its immediate replacement, CBS350-48P-4X-EU, is also discontinued; the forward replacement chain ends at C1300-48P-4X for current-generation purchasing comparisons.
SG550X-48P-K9-EU replaces SF550X-48P-K9-EU, the older 48-port Fast Ethernet PoE stackable switch. The predecessor reached end-of-sale on June 18, 2020, and Cisco support ended June 30, 2025. This replacement relationship concerns an earlier migration path; the replacement model itself is now discontinued as well.
SG550X-48P-K9-EU has a 382W PoE budget, while SG550X-48MP-K9-EU provides 740W. Both models are discontinued, so this comparison primarily concerns existing-estate requirements. The standard-power model suits an endpoint allocation within its smaller budget; the MP configuration addresses a larger combined endpoint power requirement.
SG550X-48P-K9-EU provides 48 Gigabit powered access ports, while SG550X-24P-K9-EU provides 24. Both are discontinued members of the same family. For an existing installation, the 48-port model addresses the larger connection requirement; the 24-port model addresses a smaller endpoint count without selecting unnecessary access-port density.
SG550X-48P-K9-EU offers two copper/SFP+ combo uplinks plus two dedicated SFP+ uplinks, whereas C1300-48P-4X provides four SFP+ uplinks. The older model is discontinued. Existing installations needing its copper-uplink arrangement have different requirements from buyers selecting the current replacement for a fiber-uplink design and a new hardware standard.
The Cisco 550X switch uses an external RPS2300 for power redundancy rather than a second internal power supply. An internal redundant-PSU requirement therefore needs a different hardware design. For an existing installation, specify the external power arrangement separately instead of ordering an additional internal supply module for this chassis.
ORM Systems offers SG550X-48P-K9-EU 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 on every condition; terms apply. Cisco's separate limited lifetime hardware warranty remains subject to eligibility and the July 31, 2027 support boundary.
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