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Silver rack-mountable network switch with twelve SFP ports and power supply

Cisco Systems, Inc.

Cisco Systems, Inc. WS-C3850-12S-E 12-port Gigabit SFP network switch

SKU CH-TWXS-GQBYC MPN WS-C3850-12S-E

Managed Layer 3 switch with 12 Gigabit SFP ports and 350 W power supply

  • FormatRack-mountable
  • Network Management TypeManaged
  • Primary Port Speed1000Base-X
  • Weight15.48 lb
  • Package ContentsPackage Contents: Catalyst WS-C3850-12S-E Layer 3 Switch 350
  • VersionNew
  • Layer 3 managed switching for enterprise network control
  • 12 Gigabit SFP ports for flexible fiber connectivity
  • StackWise-480 technology enables resilient switch stacking
  • 350 W AC power supply included for immediate deployment
  • Desktop and rack-mountable form factor fits varied installations

Catalyst 3850 12-port SFP switch

The Cisco Catalyst 3850-12S-E is a managed Layer 3 switch with twelve Gigabit SFP ports for fiber uplinks. It runs on the Unified Access Data Plane ASIC and supports StackWise-480 stacking. The unit ships with a 350 W AC power supply and mounts in a rack or on a desktop.

Suited for fibre aggregation, not copper access

Network teams that need a compact aggregation switch for 1000Base-X links will use the twelve SFP cages and Layer 3 routing features. Buyers who need RJ45 copper ports or Power over Ethernet for endpoints should look at other models. The fixed uplink count also limits designs that require modular expansion slots.

Twelve fixed 1000Base-X SFP ports decide fit

The switch provides exactly twelve Gigabit SFP interfaces and no built-in copper ports. Every connection requires a compatible transceiver module. Confirm your cabling plan uses fiber before selecting this chassis.

Highlights

  • Layer 3 managed switching for enterprise network control
  • 12 Gigabit SFP ports for flexible fiber connectivity
  • StackWise-480 technology enables resilient switch stacking
  • 350 W AC power supply included for immediate deployment
  • Desktop and rack-mountable form factor fits varied installations

Specifications

BrandCISCO
Series3850
ModelWS-C3850-12S-E
FormatRack-mountable
Network Management TypeManaged
Primary Port Speed1000Base-X
Weight15.48 lb
Package ContentsPackage Contents:
Catalyst WS-C3850-12S-E Layer 3 Switch
350WAC Power Supply
VersionNew
Shipping weight13.74 kg
Package size561 × 562 × 155 mm

Questions about this item

How do I install the WS-C3850-12S-E in a rack and what step is often missed?

Mount the switch using the included rack brackets, then insert the 350WAC power supply and secure its retaining latch; the step often missed is fully seating the power supply until the latch clicks.

What maintenance or replacement will the WS-C3850-12S-E need later?

The redundant fans and the 350WAC power supply are field-replaceable; plan to swap a fan module if airflow drops or replace the power supply if its status LED shows a fault.

What limit appears first on the WS-C3850-12S-E under sustained load?

The 350 W power supply caps total system draw, so sustained PoE+ loads across all 12 SFP ports will hit the power budget before the StackWise-480 backplane saturates.

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