SKU: 3354468794

Cudy 1.25G Bi-Directional Single-Mode SFP Transceiver, 20km, Single LC Connector

Sale price$113.70 Regular price$126.33
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Ships within 48 hours · Estimated delivery Jul 22 - Jul 27

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Description

Cudy 1.25G Bi-Directional Single-Mode SFP Transceiver, 20km, Single LC ConnectorCudy's CD SFP SMB is your answer for efficient and cost effective single mode fibre deployments! These bi directional modules redefine connectivity standards with a powerful design optimised for 1. 25 Gbps transmission over distances of up to 20km. The CD SFP SMB modules are sold as a pair and feature a smart SFP package with LC connectors, ensuring cross vendor compatibility. What distinguishes them is their novel application of bi directional

Cudy's CD-SFP-SMB is your answer for efficient and cost-effective single-mode fibre deployments! These bi-directional modules redefine connectivity standards with a powerful design optimised for 1.25 Gbps transmission over distances of up to 20km.

The CD-SFP-SMB modules are sold as a pair and feature a smart SFP package with LC connectors, ensuring cross-vendor compatibility. What distinguishes them is their novel application of bi-directional technology, which enables duplex transmission on a single fibre by utilising two distinct wavelengths for TX and RX on the same optical strand. This not only improves performance but also significantly lowers installation costs.

Choose between the SM100GSB-20A with a 1310nm FP laser and a 1550nm PIN photodetector or the SM100GSB-20B with a 1550nm DFB laser and a 1310nm PIN photodetector to meet your specific requirements.

These modules provide dependable performance because they are powered by a single +3.3V power supply and have an LVPECL-compatible data input/output interface. The CD-SFP-SMB provides a strong and secure connection thanks to its low EMI and excellent ESD protection. These modules prioritise environmental sustainability while adhering to RoHS and SFF8472 standards.

FEATURES:

SFP package with LC connector
SM100GSB-20A 1310nm FP Laser and 1550nm PIN photodetector
SM100GSB-20B 1550nm DFB Laser and 1310nm PIN photodetector
Up to 20 km transmission on SMF
+3.3V single power supply
LVPECL-compatible data input/output interface
Low EMI and excellent ESD protection
Compatible with RoHS
Compatible with SFF8472

SPECIFICATIONS:

Ethernet Channel Speed 1.25 GB/s
Fibre Channel Speed 1.06 Gb/s
Form Factor SFP (BiDi)
Mode Single Mode
Supported Distance 20km
Wavelength 1310nm / 1550nm
Optical Eye Diagram IEEE 802.3z and ANSI Fibre Channel Compatible
Input Differential Impendence (Min) (Max) 90, 110 Ohm
Data Input Swing Differential (Min) (Max) 500, 2400 mV
Output differential impendence (Typ) 100 Ohm
Data Input Swing Differential (Min) (Max) 370, 2000 mV
Supply Voltage (Min) (Max) 3.15, 3.45 V
Operating Case Temperature (Min) (Max) 0, 70 ℃
Voltage 3-15 ~ 3.45 V
Bias Current 10 ~ 80 mA
Tx Power -9 ~ -3 dBm
Rx Power -26~-3 dBm

WHAT’S IN THE BOX:

  • Cudy 1.25Gbps BIDI SFP Optical Transceiver 20Km DDM x1
  • Installation Guide x1
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 3354468794

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E
Verified Purchase
Eduardo Lainez
San Leandro, US
★★★★★ 5
Great Keyboard Case!
Color: Pink
Bought this for the wife for Mother’s Day since she needed a new keyboard and case. She used my old Magic Keyboard but constantly was tired of taking her iPad off, just to rotate it. Bought this and she loves it. Very durable, even with our 2 year old playing with it. Keyboard is bright and is good to use. Just a Bluetooth keyboard setup and it’s all good to go! Definitely great value for the money and something highly recommended for those with an iPad Air or Pro.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 18, 2026
K
Verified Purchase
K. White
Boise, US
★★★★★ 5
Easy to use
Color: Mulberry, Color: Mulberry
I love it. It makes working on it so much easier
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 6, 2026
J
Verified Purchase
Jas
Belleville, US
★★★★★ 4
Super cute and soft!
Color: Pine Green, Color: Pine Green
I really like this case. I was surprised by how soft it is! It arrived in perfect condition (just like the photos), no smell, keyboard worked. I followed the sellers instructions to charge before use. I gave it one less star because personally don’t care about the keyboard, it’s a little on the slower side when using the mousepad or typing. I didn’t have any issues with connecting. It was an easy setup. I’d suggest you spend the money for a laptop or a true keyboard if you need it. This is more for looks. If it wasn’t for the quality of the case, I’d probably return.
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Reviewed in the United States on December 15, 2025
D
Verified Purchase
Denise Z
Lowell, US
★★★★★ 5
Good protection for my ipad
Color: Sky Blue
Flap to close is magnetic, so it stays closed. Has a spot for the open for the ipad. Keyboard is a handy feature to have, and love that it lights up.
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Reviewed in the United States on June 11, 2026
O
Verified Purchase
Omar Zapata
Chelsea, US
★★★★★ 3
Case quality is great, but keyboard is disappointing
Color: Mulberry
The quality of the case is really great. Plum color is beautiful. However, the keyboard is not the best quality. The keys are not sensitive enough and you can easily misspell words if you don’t click a key hard enough. The trackpad shortcuts are cool but inconvenient since you can turn off the shortcuts. You can turn off the trackpad but that just doesn’t work for me.
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Reviewed in the United States on May 16, 2026

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