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SKU: SM321A-2

TP-Link Gigabit Single-Mode WDM Bi-Directional SFP Module

TP-LINK
£14.92
Price history

Price changes in the past 30 days

November 26, 2025 £14.92 GBP
  • WDM Bi-Directional SFP Module
  • Supports WDM Bi-Directional technology, using a single strand of fiber, cost saving
  • Paired with TL-SM321B or CM112CM
  • Compatible with T3700 series, T2700 series, T2600 series, T2500 series, T1700 series, T1600 series, T1500 series, 2/3/5 series switches and MC220L

TP-LINK´s TL-SM321A adopts the latest standard 1000Base-BX, transmission over a single strand of fiber, with one different wavelength going in each direction. You can extend the network distance up to 10Km (6.2 miles) paired with TP-LINK TL-SM321A, MC112CS, or compatible third-party WDM module.

Performance
Wavelength-division multiplexing (WDM) Yes
Fiber ethernet cabling technology 1000BASE
Networking standards IEEE 802.3z
Rx wavelength (max) 1310 nm
Tx wavelength (max) 1550 nm
Maximum transfer distance 1000 m
SFP transceiver standard BX
Fiber cable diameters supported (core/cladding) 9/125 µm
Fiber optic connector LC (UPC)
Multi-mode fiber (MMF) supported No
Single-mode fiber (SMF) supported Yes
Interface type SFP
Maximum data transfer rate 1250 Mbit/s
SFP transceiver type Fiber optic
Features
Hot-swap Yes
Product colour Metallic
Power
Input voltage 3.3 V
Certificates
Certification CE, FCC
Compliance certificates RoHS
Operational conditions
Storage relative humidity (H-H) 5 - 90%
Operating relative humidity (H-H) 10 - 90%
Storage temperature (T-T) -40 - 80 °C
Operating temperature (T-T) 0 - 70 °C
Packaging content
Quantity per pack 1 pc(s)
Packaging data
Package weight 60 g
Package height 38.5 mm
Package depth 122.5 mm
Package width 81.5 mm
Logistics data
Harmonized System (HS) code 85369010