Alternative to NTK591QB: Better-Value Equivalents in Stock
Comparing the NTK591QB (NTK591QB - Nortel 1.25Gb/s 1.25GBase-CWDM Single-Mode Fiber 40km 1551nm Duplex LC Connector SFP Transceiver Module) against alternatives? Pro Disk Network stocks 12 similar parts that offer comparable performance at different price points. Each option below is in-stock, US-warehoused, and tested-and-certified before ship. Bulk pricing is available on quantities of 5+; B2B procurement can use Net 30 with PO.
About the NTK591QB
| SKU | NTK591QB |
|---|---|
| Product | NTK591QB - Nortel 1.25Gb/s 1.25GBase-CWDM Single-Mode Fiber 40km 1551nm Duplex LC Connector SFP Transceiver Module |
| Current price | $367.03 |
| Stock status | In Stock |
| Detail page | View NTK591QB › |
Alternatives to NTK591QB
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
NTK591QB-ACC - Accortec 1.25Gb/s 1.25GBase-CWDM Single-Mode Fiber 80km 1551nm Duplex LC Connector SFP Transceiver Module for Ciena Compatible
SKU: NTK591QB-ACC
Price: $451.49
NTK591PB - Nortel 1.25Gb/s 1.25Base-CWDM Single-Mode Fiber 40km 1530nm Duplex LC Connector SFP Transceiver Module
SKU: NTK591PB
Price: $367.03
CWDM-SFP10G-1590 - Cisco 10Gbps 10GBase-CWDM Single-mode Fiber 40km 1590nm Duplex LC Connector SFP+ Transceiver Module
SKU: CWDM-SFP10G-1590
Price: $1,533.26
CWDM-SFP10G-1310 - Cisco 10Gbps 10GBase-CWDM Single-mode Fiber 40km 1310nm Duplex LC Connector SFP+ Transceiver Module
SKU: CWDM-SFP10G-1310
Price: $1,690.88
CWDM-SFP10G-1290 - Cisco 10Gbps 10GBase-CWDM Single-Mode Fiber 40km 1290nm Duplex LC Connector SFP+ Transceiver Module
SKU: CWDM-SFP10G-1290
Price: $1,690.88
CWDM-SFP10G-1270 - Cisco 10Gbps 10GBase-CWDM Single-mode Fiber 40km 1270nm Duplex LC Connector SFP+ Transceiver Module
SKU: CWDM-SFP10G-1270
Price: $1,690.88
CWDM-SFP10G-1470 - Cisco 10Gb/s 10GBase-CWDM Single-Mode Fiber 40km 1470nm Duplex LC Connector SFP+ Transceiver Module
SKU: CWDM-SFP10G-1470
Price: $1,910.04
CWDM-SFP10G-1570 - Cisco 10Gbps 10GBase-CWDM Single-mode Fiber 40km 1570nm Duplex LC Connector SFP+ Transceiver Module
SKU: CWDM-SFP10G-1570
Price: $2,036.01
CWDM-SFP10G-1510 - Cisco Single-mode 10Gbps 10GBase-CWDM Fiber 40km 1510nm Duplex LC Connector SFP+ Transceiver Module
SKU: CWDM-SFP10G-1510
Price: $2,698.57
CWDM-SFP10G-1550 - Cisco Single-Mode 10Gbps 10GBase-CWDM Fiber 40km 1550nm Duplex LC Connector SFP+ Transceiver Module
SKU: CWDM-SFP10G-1550
Price: $2,807.63
CWDM-SFP10G-1490 - Cisco Single-Mode 10Gbps 10GBase-CWDM Fiber 40km 1490nm Duplex LC Connector SFP+ Transceiver Module
SKU: CWDM-SFP10G-1490
Price: $3,246.67
How we pick alternatives
Every recommendation above was selected using these criteria:
- Spec parity — capacity, speed, port count, and form factor matched within a 10% tolerance
- Price spread — alternatives shown across the price range, so you can pick on budget
- Brand mix — both OEM-equivalent and trusted aftermarket, all certified
- Reliability data — preferred parts have failure rates below 1% in our 18-month return tracking
- In stock today — shipping today, not 4-6 weeks from now
Want a side-by-side spec comparison?
We can prepare a written comparison covering throughput, power draw, form factor and validated compatibility. Email sales@prodisknetwork.com or call +1 (407) 205-8454 — most quotes ship within 4 business hours.