Dell PowerSwitch S4112T-ON
The Dell PowerSwitch S4112T-ON is a compact 1U half-width top-of-rack open networking switch equipped with 12 10GBASE-T copper ports and 3 100GbE QSFP28 uplinks. Engineered for space-constrained edge locations, mobile broadcast units, and small hyperconverged clusters, two S4112T units can be mounted side-by-side in a single 1U rack tray to provide full high-availability network redundancy.
Also written as: PowerSwitch S4112T-ON, Dell S4112T-ON, S4112T Half-Width Switch
Specifications
| Brand | Dell |
|---|---|
| Family | PowerSwitch S-Series |
| Form factor | 1U half-width switch |
| Released | May 2018 |
| Port configuration | 12x 10GBASE-T RJ45 ports + 3x 100GbE QSFP28 uplink ports |
| Switching capacity | 840 Gbps aggregate throughput (625 Mpps forwarding rate) |
| Operating system | Open Network Install Environment (ONIE); supports Dell SmartFabric OS10 |
| Airflow options | Standard (I/O to PSU) or Reverse (PSU to I/O) airflow |
| Power supply | Dual redundant hot-plug AC or DC power supplies |
Compatible parts
Transceivers
407-BCBI Dell 32Gb Short Wave SFP28 Fibre Channel Optical Transceiver
407-BCBF Dell 25GbE SFP28 SR Optical Transceiver (850nm, 100m MMF)
407-BBOG Dell 16Gb Short Wave SFP+ Fibre Channel Optical Transceiver
Rail kits
770-BCKW Dell ReadyRails II Sliding Rails for 2U PowerEdge Servers (B6)
Works together
How the Dell PowerSwitch S4112T-ON connects to servers, storage and the network: 3 ways, with the parts and products on each path.
iSCSI and NVMe/TCP over Ethernet
Keep the speed the same at all three points: a 25GbE server, a 25GbE switch port and a 25GbE array port. Mixed speeds work but the slowest link sets the pace.
Servers
Dell PowerEdge R240 1U rack
Dell PowerEdge R340 1U rack
Dell PowerEdge R740xd2 2U rack
Dell PowerEdge R840 2U rack
Dell PowerEdge R940xa 4U rack
Dell PowerEdge R6515 1U rack
Adapters for the server
540-BBGN Dell Broadcom 57412 Dual Port 10GbE SFP+ PCIe Adapter
540-BBGO Dell Broadcom 57416 Dual Port 10GBASE-T RJ45 PCIe Adapter
540-BBGP Dell Broadcom 57416 Dual Port 10GBASE-T RJ45 OCP 3.0 Adapter
540-BBGY Dell Broadcom 57414 Dual Port 10/25GbE SFP28 PCIe Low Profile Network Adapter
Storage
Dell PowerMax 2000 system bay / standard rack
Dell PowerMax 8000 system bay multi-cabinet
Dell PowerProtect DD3300 2U appliance
Dell PowerVault ME4012 2U rack
Dell PowerVault ME4024 2U rack
Dell PowerProtect DD6400 2U appliance
Optics
File storage (NFS and SMB)
Front-end ports face the clients; back-end ports (on scale-out systems) connect the nodes to each other and need their own switch pair.
Servers
- Dell PowerEdge R240 1U rack
- Dell PowerEdge R340 1U rack
- Dell PowerEdge R740xd2 2U rack
- Dell PowerEdge R840 2U rack
- Dell PowerEdge R940xa 4U rack
- Dell PowerEdge R6515 1U rack
Adapters for the server
- 540-BBGN Dell Broadcom 57412 Dual Port 10GbE SFP+ PCIe Adapter
- 540-BBGO Dell Broadcom 57416 Dual Port 10GBASE-T RJ45 PCIe Adapter
- 540-BBGP Dell Broadcom 57416 Dual Port 10GBASE-T RJ45 OCP 3.0 Adapter
- 540-BBGY Dell Broadcom 57414 Dual Port 10/25GbE SFP28 PCIe Low Profile Network Adapter
Storage
Dell Unity XT 380F 2U rack
Dell Unity XT 380XT 2U rack
Dell Unity XT 480F 2U rack
Dell Unity XT 480XT 2U rack
Dell Unity XT 680F 2U rack
Dell Unity XT 680XT 2U rack
Optics
Hyperconverged cluster
Plan at least two 25GbE ports per node to two switches; all-NVMe clusters often move to 100GbE.
HCI nodes
Dell VxRail E560F 1U rack
Dell VxRail G560 2U 4-node chassis
Dell VxRail G560F 2U 4-node chassis
Dell VxRail P Series P570F 2U rack (1 node)
Adapters for the server
- 540-BBGN Dell Broadcom 57412 Dual Port 10GbE SFP+ PCIe Adapter
- 540-BBGO Dell Broadcom 57416 Dual Port 10GBASE-T RJ45 PCIe Adapter
- 540-BBGP Dell Broadcom 57416 Dual Port 10GBASE-T RJ45 OCP 3.0 Adapter
- 540-BBGY Dell Broadcom 57414 Dual Port 10/25GbE SFP28 PCIe Low Profile Network Adapter
Optics
Plan and size it
- Draw this setup in the topology planner mrplanb.com
- Add up rack power and space rack-density.com
- iSCSI explained mrplanb.com
- Virtualization storage Ledger: scored storage platforms mrplanb.com
- Network monitoring tools compared mrplanb.com
- Dell E-Lab Navigator (Dell interoperability) dell.com
Check compatibility with Dell
Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that Dell has tested with the Dell PowerSwitch S4112T-ON.
- Compatibility Dell E-Lab Navigator (storage and SAN interoperability) (free vendor sign-in)
- Support Dell Support: drivers, manuals and service tag lookup
Equivalent models from other brands
Buying a used PowerSwitch S4112T-ON: what to check
Verify airflow direction on power supplies and fans (Normal vs Reverse), check whether dual-switch tandem 1U rack mounting tray is included, test 10GBASE-T auto-negotiation, and verify OS10 license status.
FAQ
Can two S4112T-ON switches be installed in 1U of rack space?
Yes, Dell offers an optional tandem dual-switch mounting tray that fits two S4112 switches side-by-side in 1U.
Can the 100GbE QSFP28 ports be split into 25GbE or 10GbE links?
Yes, each QSFP28 port can be broken out into 4x 25GbE or 4x 10GbE interfaces using breakout cables.
Buying or selling PowerSwitch S4112T-ON?
New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.
Sources
- Dell PowerSwitch S4112 Series Spec Sheet, checked 2026-10-27