Cisco Catalyst WS-C3850-48XS-F-S 48-Port 10G SFP+ Switch 4x 40G QSFP+ IP Base Back-to-Front Airflow - Refurbished/Tested

Condition: Refurbished

The Cisco Catalyst WS-C3850-48XS-F-S is a 1RU, 48-port 10 Gigabit SFP+ fiber switch with four fixed 40G QSFP+ uplinks, running the IP Base feature set. The "-F" denotes back-to-front airflow (FAN-T3-F fan modules and PWR-C3-750WAC-F power supply), which suits racks where the switch's port side faces the hot aisle. It is a cost-effective choice for 10G aggregation, top-of-rack, and campus distribution. In stock at Resilient Tec for $1,450, with free US shipping and a lifetime warranty.

What's Included

• Cisco WS-C3850-48XS-F-S switch with 3 × FAN-T3-F fan modules
• 1 × PWR-C3-750WAC-F 750W AC back-to-front power supply (second PSU bay open for redundancy)
• Rack mount kit, console cable, and power cord

Key Features and Specifications

• Ports:
  • 48 × 1/10 Gigabit Ethernet SFP+ ports
  • 4 × 40 Gigabit Ethernet QSFP+ uplink ports
• Switching Capacity: 1,280 Gbps
• Software Image: IP Base feature set (Layer 2 switching plus basic Layer 3 routing) on Cisco IOS XE
• Software State: Reset to factory default, standard IOS XE image loaded
• Stacking: Cisco StackWise-480 (stack cables sold separately)
• Airflow: Back-to-front (-F). Fans and power supplies are not interchangeable with front-to-back WS-C3850-48XS-S parts; match airflow across the switch
• Power Supply: 2 × hot-swappable PSU bays, 1 × PWR-C3-750WAC-F installed. Add a second PWR-C3-750WAC-F for redundancy (do not mix with -R models)
• Cooling: 3 × hot-swappable FAN-T3-F fan modules
• Physical Dimensions: 1.75" H × 17.5" W × 20.1" D (1 RU rack-mountable)
• Testing: Powered on and port-tested before shipment

Lifecycle Note

Cisco's Last Date of Support for the Catalyst 3850 fiber models is April 30, 2027, and Cisco is no longer accepting new SmartNet contracts or renewals for them. Resilient Tec's lifetime warranty covers this switch beyond that date, with advance replacement when in stock.

Frequently Asked Questions

What is the difference between WS-C3850-48XS-F-S and WS-C3850-48XS-S?
Airflow direction. The -F-S model uses back-to-front cooling (FAN-T3-F fans, PWR-C3-750WAC-F power supplies); the 48XS-S uses front-to-back (FAN-T3-R fans, PWR-C3-750WAC-R power supplies). Match the model to your rack's hot-aisle/cold-aisle layout.

Can I get Cisco SmartNet on this switch?
No. Cisco's final service contract renewal date for these models was July 29, 2026. Resilient Tec's lifetime warranty takes the place of SmartNet coverage.

What is the newer Cisco equivalent?
Cisco lists the Catalyst C9500-48Y4C as the migration path for the 3850-48XS.

How much does the WS-C3850-48XS-F-S cost at Resilient Tec?
$1,450 per unit, refurbished and tested, with free US shipping and a lifetime warranty.