Replacement for TN-GB-SM55: Drop-In Alternatives We Stock
Looking for a replacement for the TN-GB-SM55 (TN-GB-SM55 - Transition 1Gbps 1000Base-LX GBIC Single-mode (SC) 50km 1550nm 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 TN-GB-SM55
| SKU | TN-GB-SM55 |
|---|---|
| Product | TN-GB-SM55 - Transition 1Gbps 1000Base-LX GBIC Single-mode (SC) 50km 1550nm Transceiver Module |
| Current price | $363.16 |
| Stock status | In Stock |
| Detail page | View TN-GB-SM55 › |
Drop-in replacements for TN-GB-SM55
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.
TN-SFP-LX5 - Transition Network 1Gb/s 1000Base-LX Single-Mode 50km 1550nm LC Connector SFP Transceiver Module
SKU: TN-SFP-LX5
Price: $252.46
MGB-L50 - Planet 1Gbps 1000Base-LX Single-mode Fiber 50km 1550nm LC Duplex Connector SFP Mini-GBIC Transceiver Module
SKU: MGB-L50
Price: $229.68
AA1419003-E5 - Nortel 1000Base-ZX GBIC 1550nm 50km Transceiver Module
SKU: AA1419003-E5
Price: $157.26
TN-GB-SM58 - Transition 1Gbps 1000Base-LX GBIC Single-mode (SC) 80km 1550nm Transceiver Module
SKU: TN-GB-SM58
Price: $363.16
TN-SFP-OC3SB42 - Transition 100Mbps 100Base-FX Single-mode Fiber 1550nm TX/1310nm RX SM (LC) 40km SFP (mini-GBIC) Transceiver Module
SKU: TN-SFP-OC3SB42
Price: $363.16
TN-GB-SM512 - Transition 1000Base-ZX GBIC Single-mode (SC) 120km 1550nm Transceiver Module
SKU: TN-GB-SM512
Price: $548.63
TN-CWDM-SFP-1550 - Transition 1Gbps 1000Base-LX/ZX CWDM Fibre Channel Single-mode Fiber 1550NM LC Connector SFP (mini-GBIC) Transceiver Module
SKU: TN-CWDM-SFP-1550
Price: $1,662.17
1442351G3 - ADTRAN 1Gb/s 1000Base-CWDM Single-Mode Fiber 50km 1550nm LC Connector SFP Transceiver Module
SKU: 1442351G3
Price: $314.13
FWLF1621P2T55 - Finisar 2.67Gbps CWDM Single-mode Fiber 50km 1550nm SFP Transceiver Module
SKU: FWLF1621P2T55
Price: $1,233.18
CWDM-GBIC-1550 - Cisco 1Gbps 1000Base-ZX CWDM Single-mode Fiber 80km 1550nm Duplex SC Connector GBIC Transceiver Module
SKU: CWDM-GBIC-1550
Price: $178.63
15454-GBIC-ZX - Cisco 1Gbps 1000Base-ZX Single-mode Fiber 70km 1550nm Duplex SC Connector GBIC Transceiver Module
SKU: 15454-GBIC-ZX
Price: $230.88
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.