Your search for "dell s3148" revealed the following:
NEW Dell S3048-ON-RA 48x 1GB RJ45 4x 10GB SFP+ B-F Air 210-AEDP Switch
SKU: NSN-8119
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S4148F-ON-RA 210-ALSR 48x SFP+ 4x QSFP28 2x QSFP+ B-F Air OS10 Switch
SKU: NSN-8123
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Dell S4148FE-ON-RA 48x 10GB SFP+ 2x 40GB QSFP+ 4x QSFP28 B-F No OS10 Switch
SKU: NSB-9791
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Dell N3048EP-ON 48x 1GB PoE+ RJ45 2x 10GB SFP+ 2x 1GB Combo Switch
SKU: NSN-2207
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S4048-ON-RA 48x 10GB SFP+ 6x 40GB QSFP+ B-F Airflow 210-ADUZ Switch
SKU: NSN-8120
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S4148FE-ON 48x 10GB SFP+ 2x 40GB QSFP+ 4x QSFP28 F-B No OS10 Switch
SKU: NSN-9966
Condition: New
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S4048T-ON 210-AHMR 48x 10GB Copper 6x 40GB QSFP+ F-B Air OS10 Switch
SKU: NSN-1874
Condition: New
Shipping: Overnight Options
Warranty: 365 days
Dell S5148F-ON-RA 210-ANCL 48x 25GB SFP28 6x 100GB QSFP28 B-F Air OS10 Switch
SKU: NSB-9771
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
Dell S4148U-ON 210-ALRZ 48x 24x Unified SFP+ 2x QSFP+ 4x QSFP28 F-B OS10 Switch
SKU: NSH-9214
Condition: Seller refurbished
Shipping: Overnight Options
Warranty: 365 days
NEW Dell S4148T-ON 48x 10GB Copper 2x 40GB QSFP+ 4x 100GB QSFP28 F-B OS10 Switch
SKU: NSN-1907
Condition: New
Shipping: Overnight Options
Warranty: 365 days