Replacement for NTK591QB-ACC: Drop-In Alternatives We Stock
Looking for a replacement for the NTK591QB-ACC (NTK591QB-ACC - Accortec 1.25Gb/s 1.25GBase-CWDM Single-Mode Fiber 80km 1551nm Duplex LC Connector SFP Transceiver Module for Ciena Compatible)? 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 NTK591QB-ACC
| SKU | NTK591QB-ACC |
|---|---|
| Product | NTK591QB-ACC - Accortec 1.25Gb/s 1.25GBase-CWDM Single-Mode Fiber 80km 1551nm Duplex LC Connector SFP Transceiver Module for Ciena Compatible |
| Current price | $451.49 |
| Stock status | In Stock |
| Detail page | View NTK591QB-ACC › |
Drop-in replacements for NTK591QB-ACC
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.
3HE00070CE - Alcatel 1Gbps 1000Base-CWDM 1551nm 120km Single-mode Fiber 1551nm SFP Transceiver
SKU: 3HE00070CE
Price: $243.74
1442703PG5 - ADTRAN 622Mb/s CWDM OC-12 Single-Mode Fiber 80km 1551nm LC Connector SFP Transceiver Module
SKU: 1442703PG5
Price: $502.20
XFP-10G-CWDM1551 - Juniper 10Gbps 10GBase-CWDM 8 Channel C-Band Single-mode Fiber 80km 1551nm LC Connector XFP Transceiver Module
SKU: XFP-10G-CWDM1551
Price: $8,625.18
CWDM-XENPAK-10G-1551 - Cisco 10Gbps CWDM 80km 1551nm Xenpak Transceiver Module
SKU: CWDM-XENPAK-10G-1551
Price: $1,559.91
NTK591QB - Nortel 1.25Gb/s 1.25GBase-CWDM Single-Mode Fiber 40km 1551nm Duplex LC Connector SFP Transceiver Module
SKU: NTK591QB
Price: $367.03
02310LQY - Huawei 10Gbps Single-mode Fiber 70km 1551nm LC Connector XFP CWDM Optical Transceiver Module
SKU: 02310LQY
Price: $4,131.49
NTK591TB-ACC - Accortec 1.25Gb/s 1.25Base-CWDM Single-Mode Fiber 80km 1610nm Duplex LC Connector SFP Transceiver Module for Ciena Compatible
SKU: NTK591TB-ACC
Price: $451.49
NTK591RB-ACC - Accortec 1.25Gb/s 1.25Base-CWDM Single-Mode Fiber 80km 1570nm Duplex LC Connector SFP Transceiver Module for Ciena Compatible
SKU: NTK591RB-ACC
Price: $451.53
NTK591PB-ACC - Accortec 1.25Gb/s 1.25Base-CWDM Single-Mode Fiber 80km 1530nm Duplex LC Connector SFP Transceiver Module for Ciena Compatible
SKU: NTK591PB-ACC
Price: $451.53
SFP-1GB-CW-53-80-ACC - Accortec 1Gbps 1000Base-CWDM Single-mode Fiber 80km LC Connector SFP Taa Transceiver Module
SKU: SFP-1GB-CW-53-80-ACC
Price: $469.72
100-03789-ACC - Accortec 1.25Gbps 1000Base-CWDM Single-mode Fiber 80km 1470nm Duplex LC Connector SFP Transceiver Module
SKU: 100-03789-ACC
Price: $478.99
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.