Your search for "Dell S3148" revealed the following:
NEW Dell S4148U-ON 48x 24x Uni SFP+ 2x QSFP+ 4x QSFP28 F-B No OS10 Switch
SKU: NSN-9962
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Dell S4148U-ON 210-ALRZ 48x 24x Uni SFP+ 2x QSFP+ 4x QSFP28 F-B No OS10 Switch
SKU: NSB-9786
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S4048-ON 48x 10GB SFP+ 6x 40GB QSFP+ Front-to-Back Air 210-ADUW Switch
SKU: NSN-1862
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Dell S4148U-ON-RA 48x (24x Unified) SFP+ 2x QSFP+ 4x QSFP28 B-F No OS10 Switch
SKU: NSB-9787
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S4148U-ON-RA 48x (24x Unified) SFP+ 2x QSFP+ 4x QSFP28 B-F OS10 Switch
SKU: NSN-8126
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S4148F-ON 210-ALSI 48x SFP+ 4x QSFP28 2x QSFP+ F-B Air OS10 Switch
SKU: NSN-1906
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S4148F-ON-RA 210-ALSR 48x SFP+ 4x QSFP28 2x QSFP+ B-F (No OS10) Switch
SKU: NSN-9931
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S4148U-ON-RA 48x 24x Unified SFP+ 2x QSFP+ 4x QSFP28 B-F No OS10 Switch
SKU: NSN-9963
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Dell S5248F-ON 48x 25GB SFP28 2x 200GB QSFP28-DD 4x QSFP28 F-B No OS10 Switch
SKU: NSB-9762
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S4148U-ON 48x 24x Unified SFP+ 2x QSFP+ 4x QSFP28 F-B OS10 Switch
SKU: NSN-3864
Condition: New
Shipping: Overnight Options
Warranty: 365 days