1000base-BX SFP 1310nm-Tx/1550nm-Rx 1.25G 40km Simplex LC DOM SMF

Basic Information
Place of Origin: China
Brand Name: GIGAOPTO
Certification: CE, FCC, ROHS, ISO9001, ISO14000, MSDS, REACH, CP65, TUV, UL
Model Number: GTS-B3512-40DC
Minimum Order Quantity: 1 pcs
Price: Negotiable
Packaging Details: Single Package, 10 or 20pcs per Tray, 30 or 50 or 100pcs per box, 400 or 600pcs per carton
Delivery Time: 1-5 working days
Payment Terms: T/T, Western Union
Supply Ability: 100,000pcs / month
Detail Information
Product Name: 1000base-BX SFP 1.25 G 1310nm 40km Product Form Type: SFP
Data Transfer Rate: 1000Mb/s DOM Support: Yes
Connector Type: Simplex LC Max Distance: 40km (24.9 Miles)
Centre Wavelength: 1310nm-TX/1550nm-RX Power Budget: 20dB
Keywords: 1.25G BiDi SFP 40km, Fiber Optic Module SFP BiDi, 1000BASE-BX T1310nm R1550nm
High Light:

1000base-BX SFP 1310nm-Tx/1550nm-Rx




SFP 1.25 G 1310nm 40km

Product Description

Cisco Compatible 1000BASE-BX BiDi SFP Transceiver 1.25G 40km 1310nm-Tx/1550nm-Rx Simplex LC DOM SMF





The GIGAOPTO's GTS-B3512-40DC transceiver is a single fiber bi-directional 1.25Gbps Small Form-factor Pluggable (SFP) BIDI module for use in 1000BASE Ethernet and 1G Fiber Channel. The 1000BASE-BX40 BiDi SFP transceiver provides up to 40km high-speed data links of 1000Base-BX throughput over single-mode fiber (SMF) using 1310nm-TX/1550nm-RX wavelengths via LC simplex connectors.


The SFP module supports Digital Optical Monitoring (DOM) functions according to the industry-standard SFF-8472 Multi-Source Agreement (MSA). This feature gives the end user the ability to monitor real-time parameters of the SFP, such as optical output power, optical input power, temperature, laser bias current, and transceiver supply voltage.


The GTS-B3512-40DC SFP transceiver module is a Class 1 laser product that complies with FDA/CDRH and IEC-60825 standards.



  • A type: 1310nm DFB TX /1550nm RX
  • B type: 1550nm DFB TX /1310nm RX
  • Supports up to 1.25Gbps bit rates
  • Metal enclosure provides lower EMI
  • Supports digital optical monitoring capability
  • International Class 1 laser safety certified
  • Single +3.3V power supply
  • Hot-pluggable SFP footprint
  • Link distances up to SMF 40km
  • BIDI LC/UPC type pluggable optical interface
  • Low power dissipation
  • Case operating temperature range:

Commercial: 0°C ~ 70°C (32 ~ 158°F)

Extended: -20°C~ 85°C (-4 ~ 185°F)

Industrial: -40°C~85°C (-40 ~ 185°F)

  • Compliant with SFP MSA and SFF-8472
  • Compliant with IEEE 802.3z
  • Compatible with RoHS6



  • Gigabit Ethernet
  • Switched Backplane Applications
  • 1x Fiber Channel
  • Switch to Switch Interface
  • Router/Server Interface




Compatible Brand CISCO Compatible Part Number GLC-BX40-U
Form Factor SFP Data Link 1250Mbps
Connector Type Simplex LC Link Length 40,000m (131,234 ft)
Digital Optical Monitoring YES

Fiber Mode

Single Mode Fibre
Storage Temperature Range -40 to 85°C (-40 to 185°F) Environment


0 to 70°C (32 to 158°F)

Power Budget 20dB Ambient Humidity 5%~70% Non-condensing
Center Wavelength 1310nm-TX/1550nm-RX Power Supply Voltage 3.30V
Max Power Consumption 1W Power Supply Current <280mA
Optical Components DFB BiDi Receiver Type PIN
Optical Output Power -5~0dBm RX Sensitivity < -23dBm
Extinction Ratio >9dB

Input Saturation


Protocols Gigabit Ethernet, Gigabit Fibre Channel, MSA Compliant


Notice: When the long reach transceiver is used in short distance transmission, please matched with appropriate attenuator

according to the table.

Distance ≤10km ≤20km
Attenuator 10dB 5dB





Gigaopto's optical transceivers are 100% compatible with many famous switch brands and will not cause damage to OEM devices. In order to ensure the quality and compatibility of our products, each product is carefully tested on the corresponding equipment before delivery to customers.
For this (1000BASE-BX BiDi SFP TX-1310nm/RX-1550nm 40km) compatibility, please refer to the P/N correspondence table. If the brand and part number you are looking for is not listed below, please let us know and we will be delighted to provide you with more details.


Compatible Brand Compatible P/N/ Compatible Brand Compatible P/N
CISCO GLC-BX40-U Brocade E1MG-1G-BXU-40
Juniper SFP-GE40KT13R15 D-Link DEM-331R



Ordering Information


P//N Description Speed Wavelength Distance Transmitter TX Power
GTS-B3412-40DC 1000BASE-BX BiDi SFP 1250Mb/s T1310nm/R1490nm 40km DFB -5~0dBm
GTS-B4312-40DC 1000BASE-BX BiDi SFP 1250Mb/s T1490nm/R1310nm 40km DFB -5~0dBm
GTS-B3512-40DC 1000BASE-BX BiDi SFP 1250Mb/s T1310nm/R1550nm 40km DFB -5~0dBm
GTS-B5312-40DC 1000BASE-BX 1.25G BiDi SFP 1250Mb/s T1550nm/R1310nm 40km DFB -5~0dBm



Pin Definition


1000base-BX SFP 1310nm-Tx/1550nm-Rx 1.25G 40km Simplex LC DOM SMF 0



Typical Application Circuit


1000base-BX SFP 1310nm-Tx/1550nm-Rx 1.25G 40km Simplex LC DOM SMF 1



Package Outline

Dimensions are in millimeters. All dimensions are ±0.1mm unless otherwise specified. (Unit: mm)


1000base-BX SFP 1310nm-Tx/1550nm-Rx 1.25G 40km Simplex LC DOM SMF 2

Contact Details

WhatsApp : +8615989585901