Lifecycle record
N520-X-20G4Z-D EOL & EOSL Dates
Cisco NCS 520 - 20xGE + 4x10GE, Industrial Temp
Lifecycle status
EoS - Sales Ended
N520-X-20G4Z-D is no longer sold by Cisco; end of sale was 2025-10-28. Support continues until 2030-10-31. Recommended replacement: N540X-8Z16G-SYS-A.
Last checked: 2026-06-16
EOL & EOSL Dates and Details
| End-of-Life Announcement (EOL) | 2024-10-28 |
|---|---|
| End of Sale (EOS) | 2025-10-28 |
| End of Service Life (EOSL) | 2030-10-31 |
| Manufacturer | Cisco |
| Category | Routers |
| Product Series | Cisco NCS 520 |
| Part Number | N520-X-20G4Z-D |
| Model Number | N520-X-20G4Z-D= |
| Release Date | - |
| Replacement Part Number | N540X-8Z16G-SYS-A |
| Replacement Product Name | Cisco N540 12/20(CSFP)x1G + 4x1GCu +8x1/10G DualAC iTEMP Conf-Coat |
Lifecycle Timeline
Recorded lifecycle milestones in date order.
Additional Information
Support milestones and the official source recorded for this model.
| Last Ship Date: HW, License | 2026-01-27 |
|---|---|
| End Of New Service Attachment Date: HW | 2026-10-28 |
| End Of SW Maintenance Releases Date: HW | 2026-03-30 |
| End Of Routine Failure Analysis Date: HW | 2026-10-28 |
| End Of Vulnerability/Security Support: HW | 2027-09-30 |
| End Of Service Contract Renewal Date: HW | 2030-01-26 |
| Last Date Of Support: HW | 2030-10-31 |
| Official EOL Notice | View Official EOL Documentation |
More Cisco NCS 520 EOL Dates
| Part Number | Product Name | EOL Announcement | End of Sale |
|---|---|---|---|
| N520-20G4Z-A | Cisco NCS 520 - 20xGE + 4x10GE, Commercial Temp | 2024-10-28 | 2025-10-28 |
| N520-20G4Z-D | Cisco NCS 520 - 20xGE + 4x10GE, Industrial Temp | 2024-10-28 | 2025-10-28 |
| N520-4G4Z-A | Cisco NCS 520 - 4xGE + 4x10GE, Commercial Temp | 2024-10-28 | 2025-10-28 |
| N520-4G4Z-A-BUN | Cisco NCS 520 8-port, Commercial Temp, Promo Bundle | 2024-10-28 | 2025-10-28 |
| N520-CBL-BRKT | Cisco NCS 520 Cable Bracket | 2024-10-28 | 2025-10-28 |
| N520-CONS-KIT-S | Cisco NCS 520 Series Serial Console Cabling Kit | 2024-10-28 | 2025-10-28 |
| N520-RCKMT-19-D2A | Cisco NCS 520 19" Rackmount for 8 Port, AC | 2024-10-28 | 2025-10-28 |
| N520-RCKMT-19-D2D | Cisco NCS 520 19" Rackmount for 8 Port, DC | 2024-10-28 | 2025-10-28 |