SFP-B1253S-20 1.25G SFP Bidi 20KM SC

Optical SFP Module

1.25Gbps SFP Transceiver Bi-Di TX1550/RX1310nm 20km SC

Share on


1.25Gbps SFP Transceiver Bi-Di TX1550/RX1310nm 20km SC



  • Up to 1.25Gbps data links
  • 1550nm DFP laser and PIN photo detector for 20km transmission
  • Compliant with SFP MSA and SFF-8472 with single SC receptacle
  • Digital Diagnostic Monitoring: Internal Calibration or External Calibration
  • Single +3.3V power supply
  • Compatible with SONET
  • Compatible with RoHS
  • Operating case temperature: Commercial: 0℃ to +70℃   Industrial: -40℃ to +85℃



  • SDH and SONET system
  • Fiber Channel
  • Switch to Switch interface
  • Switched backplane applications
  • Router/Server interface
  • Other optical transmission systems



The SFP transceivers are high performance, cost effective modules supporting 1.25Gbps and 20km transmission distance with SMF.

The transceiver consists of three sections: a DFP laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. All modules satisfy class I laser safety requirements.

The transceivers are compatible with SFP Multi-Source Agreement (MSA). For further information, please refer to SFP MSA.


Absolute Maximum Ratings

Parameter Symbol Min Max Unit
Supply Voltage Vcc 0 4 V
Storage Temperature Ts -40 +85 °C
Operating Humidity 5 85 %


Recommended Operating Conditions

Parameter Symbol Min Typical Max Unit
Operating Case Temperature Standard Tc 0 +70 °C
Industrial -40 +85 °C
Power Supply Voltage Vcc 3.13 3.3 3.47 V
Power Supply Current Icc 300 mA
Data Rate 1.25 Gbps


Ordering information

Model No. Product Description
SFP-B1253S-20 1.25Gbps, TX1550nm/RX1310nm, SC, 20km, 0ºC ~ +70ºC, with DDM
SFP-B1253S-20I 1.25Gbps, TX1550nm/RX1310nm, SC, 20km, -40ºC ~ +85ºC, with DDM



Top Rated Fiber Optic Supplier

Ask For A Quote

We will contact you within 48 hours

View our Brochure of fiber optic products

AOA Tech-Fiber Optic Products Brochure

Note: Your email information will be kept strictly confidential.