Replacement for NTK591SH: Drop-In Alternatives We Stock
Looking for a replacement for the NTK591SH (NTK591SH - Nortel 1Gb/s 1000Base-CWDM Single-Mode Fiber 120km 1590nm LC Connector SFP Transceiver Module)? Pro Disk Network ships drop-in replacements and equivalent modern parts from US inventory. Every alternate below is in-stock today with same-day shipping for orders placed before 2pm ET. If your unit is still under warranty, contact our engineering team — we offer cross-shipping for B2B customers on Net 30 terms.
About the NTK591SH
| SKU | NTK591SH |
|---|---|
| Product | NTK591SH - Nortel 1Gb/s 1000Base-CWDM Single-Mode Fiber 120km 1590nm LC Connector SFP Transceiver Module |
| Current price | $502.20 |
| Stock status | In Stock |
| Detail page | View NTK591SH › |
Drop-in replacements for NTK591SH
Each part below is currently in our US warehouse, ships same-day for orders before 2pm ET, and includes our 90-day warranty. SKUs link to the full product page with photos, datasheets and B2B quote form.
CWDM-SFP-1550-120KM - Cisco 1Gbps 1000Base-CWDM Fibre Channel Single-mode Fiber 120km 1550nm Duplex LC Connector SFP Transceiver Module
SKU: CWDM-SFP-1550-120KM
Price: $598.36
10-1459-01 - Cisco 1Gb/s 1000Base-CWDM Single-Mode Fiber 120km 1590nm Duplex SC Connector GBIC Transceiver Module
SKU: 10-1459-01
Price: $566.91
NTK591SH-ACC - Accortec 1Gb/s 1000Base-CWDM Single-Mode Fiber 120km 1590nm LC Connector SFP Transceiver Module for Ciena Compatible
SKU: NTK591SH-ACC
Price: $610.22
FTR-1619-59 - Finisar 1.25Gbps 1000Base-CWDM Single-mode Fiber 120km 1590nm Transmitter Wavelength SC Connector GBIC Transceiver Module
SKU: FTR-1619-59
Price: $188.30
10-2003-01 - Cisco 155Mb/s OC-3/STM-1 CWDM Single-Mode Fiber 120km 1590nm LC Connector SFP Transceiver Module
SKU: 10-2003-01
Price: $2,295.28
NTK590SH - Nortel 1Gb/s 1000Base-CWDM Single-Mode Fiber 70km 1590nm LC Connector SFP Transceiver Module
SKU: NTK590SH
Price: $367.03
CWDM-GBIC-1590-RF - Cisco 1Gb/s 1000Base-ZX CWDM Single-Mode Fiber 80km 1590nm Duplex SC Connector GBIC Transceiver Module
SKU: CWDM-GBIC-1590-RF
Price: $392.62
CWDM-GBIC-1590 - Cisco 1Gb/s 1000Base-ZX CWDM Single-Mode Fiber 80km 1590nm Duplex SC Connector GBIC Transceiver Module
SKU: CWDM-GBIC-1590
Price: $525.96
SFP-CWDM-1590-70 - Cisco 1Gb/s 1000Base-CWDM Single-Mode Fiber 70km 1590nm LC Connector SFP (mini-GBIC) Transceiver Module
SKU: SFP-CWDM-1590-70
Price: $4,742.18
NTK591TH - Nortel 1Gb/s 1000Base-CWDM Single-Mode Fiber 120km 1610nm LC Connector SFP Transceiver Module
SKU: NTK591TH
Price: $502.20
NTK591QH - Nortel 1Gb/s 1000Base-CWDM Single-Mode Fiber 120km 1550nm LC Connector SFP Transceiver Module
SKU: NTK591QH
Price: $502.20
How we pick replacements
Every recommendation above was selected using these criteria:
- Drop-in compatibility — same form factor (2.5"/3.5", PCIe slot, SFP port, etc.), so it fits the original chassis without modification
- Equivalent or better performance — matched on RPM/IOPS/speed/throughput, never downgraded
- Same-brand-preferred — we list the OEM-equivalent first when available, then trusted aftermarket
- Warranty coverage — 90-day Pro Disk warranty on every part, with 1-year option for B2B
- In stock today — never recommend a part that is on backorder
Need help confirming compatibility?
Our engineers validate every replacement against your specific server, switch, or chassis model before shipment. Email sales@prodisknetwork.com with your platform model (e.g., Dell PowerEdge R740, HP DL380 Gen10, Cisco Catalyst 9300) and we will confirm the exact part number that drops into your hardware.