Replacement for FWLF-1631-21: Drop-In Alternatives We Stock
Looking for a replacement for the FWLF-1631-21 (FWLF-1631-21 - Finisar 2.7Gbps DWDM Single-mode Fiber 80km 1560.61nm 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 FWLF-1631-21
| SKU | FWLF-1631-21 |
|---|---|
| Product | FWLF-1631-21 - Finisar 2.7Gbps DWDM Single-mode Fiber 80km 1560.61nm SFP Transceiver Module |
| Current price | $1,240.33 |
| Stock status | In Stock |
| Detail page | View FWLF-1631-21 › |
Drop-in replacements for FWLF-1631-21
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.
FWLF1634RL21 - Finisar 4.25Gbps 1000Base-ZX DWDM Single-mode Fiber 80km 1560.61nm Duplex LC Connector SFP Transceiver Module
SKU: FWLF1634RL21
Price: $1,826.84
DWDM-SFP-4214-RF - Cisco 1Gbps 1000Base-DWDM Single-mode Fiber 80km 1542.14nm Duplex LC Connector SFP Transceiver Module
SKU: DWDM-SFP-4214-RF
Price: $1,551.25
FWLF163121 - Finisar 2.70Gbps OC-48 DWDM Single-Mode Fibre 80km 1560.61nm LC Connector SFP Transceiver Module
SKU: FWLF163121
Price: $1,249.24
FTRJ1321P1BTL - Finisar 2.67Gbps OC-48 SR/STM I-16 Single-mode Fiber 80km 1310nm Duplex LC Connector SFP Transceiver Module
SKU: FTRJ1321P1BTL
Price: $97.14
FWLF1621P2T57 - Finisar 2.67Gbps OC-48 CWDM Single-mode Fiber 80km 1571nm Duplex LC Connector Hot-pluggable SFP Transceiver Module
SKU: FWLF1621P2T57
Price: $1,233.18
FTLX4213M3BCL - Finisar 10Gbps DWDM 10GBase-ZR Single-Mode Fiber 120km 1550nm Duplex LC Connector XFP Transceiver Module
SKU: FTLX4213M3BCL
Price: $4,999.83
FTLX3613M321 - Finisar 10Gbps 10GBase-DWDM Single-mode Fiber 40km 1560.61nm Duplex LC Connector XFP Transceiver Module
SKU: FTLX3613M321
Price: $5,411.88
10-2321-02 - Cisco Single-mode 10Gbps 10GBase-DWDM OC-192/STM-64 Fiber 80km 1551.72nm Duplex LC Connector XFP Transceiver Module
SKU: 10-2321-02
Price: $249.39
100-02163-ACC - Accortec 10Gbps 10GBase-DWDM Single-mode Fiber 80km 1548.51nm Duplex LC Connector XFP Transceiver Module
SKU: 100-02163-ACC
Price: $271.16
GP-XFP-W21-ACC - Accortec 10Gbps 10GBase-DWDM Single-mode Fiber 80km 1560.61nm Duplex LC Connector XFP Transceiver Module
SKU: GP-XFP-W21-ACC
Price: $3,015.14
100-02146-ACC - Accortec 10Gbps 10GBase-DWDM Single-mode Fiber 80km 1554.13nm Duplex LC Connector XFP Transceiver Module
SKU: 100-02146-ACC
Price: $3,136.75
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.