SKU: 40440819711

SM100GSB-20AB

Sale price$115.43 Regular price$128.26
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Description

SM100GSB-20ABCudy Single Mode 1. 25G LC Bi Directional SFP 20km, SM100GSB 20A: 1310nm FP Laser & 1550nm PIN Photodetector SM100GSB 20B: 1550nm DFB Laser and 1310nm PIN Photodetector, Ethernet Channel Speed: 1. 25GB s, Fibre Channel Speed: 1. 06Gb s, Voltage: 3 15~3. 45V 1. 25Gbps BIDI SFP Optical Transceiver 20Km DDM Overview Cudys CD SFP SMB is your answer for efficient and cost effective single mode fibre deployments! These bi directional modules redefine

Cudy Single Mode 1.25G LC Bi-Directional SFP 20km, SM100GSB-20A:1310nm FP Laser & 1550nm PIN Photodetector - SM100GSB-20B:1550nm DFB Laser and 1310nm PIN Photodetector, Ethernet Channel Speed:1.25GB/s, Fibre Channel Speed:1.06Gb/s, Voltage:3-15~3.45V

1.25Gbps BIDI SFP Optical Transceiver 20Km DDM

Overview

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

Downloads

Additional Information

Device Transceiver
Type 1.25Gbps | BIDI | SFP | 20Km | DDM
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: 40440819711

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4.2 ★★★★★
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A
Verified Purchase
Amazon Customer
Port Orchard, US
★★★★★ 5
Finally a dual vertical stand with a stable build, quality materials, and snug fit for MacBook Pro
Color: Black Walnut, Color: Black Walnut
I don’t normally write reviews but I’ve had so much trouble finding an adequate vertical stand for two MacBook Pros that doesn’t worry me every time I look at it. I can finally say with confidence that I won’t need to replace this one. Not only is this stand attractive, it is simply a lot more sturdy than the all-metal “industrial” stand that it will replace because my MacBooks fit into it without wobbling, it has a wide surface area base, and its overall fairly heavy due to a solid wood + solid metal build. This vertical stand stands apart in the two areas that my previous two stands have failed at: 1. A snug fit with a protective lining so that the laptops don’t wobble and bump into each other (the dual Omoton I have suffers from this terribly where the laptops bump and lean against one another) 2. A solid base with enough weight to prevent the stand from tipping over from an accidental bump (my single-laptop human centric mount is beautiful, but the base is too light and narrow so that any decent contact feels that it might tip over) This stand has a very solid build quality with a nice weight to it which is comforting when potentially storing two expensive pieces of hardware in a vertical orientation that lends to tipping over (MacBook Pros are absurdly well over $2k a piece now on average). This is now the third vertical stand I’ve purchased for my two MacBook pros (work & personal). It’s not my third because I compulsively purchase things I don’t need (though I do do that), but rather because the previous two models felt unstable and carried a greater risk of damaging a few thousand dollars in equipment. Anyway, this is my first purchase from this brand but I highly recommend!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 23, 2025
P
Verified Purchase
P. C.
Dallas, US
★★★★★ 5
Perfect!
Color: Black Walnut, Color: Black Walnut
Amazing! I work off two laptops and this keeps them organized and aesthetically pleasing. True to color. Super sturdy. Doesn’t slide around. Shown in pic on far right.
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Reviewed in the United States on March 20, 2026
C
Verified Purchase
Chris @ Jester's Motley
Birmingham, US
★★★★★ 5
Perfect for laptops, tablets, Remarkables, Kindles - you name it! This dock is perfect!
Color: Black Walnut, Color: Black Walnut
Coming across UPERGO has been a blessing. To find items of this caliber without having to pay a mortgage payment on it is a lifesaver. It truly is, and I have found that based on my desk setups in my office, UPERGO has not let me down with any of their products. I had already previously owned a UPERGO Vertical Laptop stand. I use that one for my productivity desk for my work laptop and my personal gaming laptop. So, I knew its quality was legitimately top notch already. The problem I ran into was a workflow issue. I have four portable devices that I carry every day at some point: Microsoft Surface Pro 13", Remarkable Paper Pro, Remarkable Paper Pro Move, and a Kindle Colorsoft. The problem is that I did not want to keep them inside the desk drawer that I use. So, I need something to help save some space on my desk and sort of dock these items when there were not in use. I set one on each opposite side of my desk and that worked out perfectly. I was able to save desk space but also add a bit of protection for these devices. I could adjust the slots, if needed, but it worked out just fine. And the material inside gripped these devices perfectly. Once again, UPERGO has been able to build a product that fit ideally into my use-case. This time, albeit in a slightly different manner, but it was exactly what I was looking for.
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Reviewed in the United States on May 22, 2026
B
Verified Purchase
Brian
Charlottesville, US
★★★★★ 5
High Quality Stand
Color: Walnut
Surprised by the quality of this stand. Exceeded my expectations. Very sturdy and easy to adjust. Expect this to last many years. Looks great on my desk too. Worth every penny. A+
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Reviewed in the United States on April 21, 2026
J
Verified Purchase
jb3
New York, US
★★★★★ 5
Surprisingly Amazing!
Color: Walnut, Color: Walnut
I bought this expecting it to be a cheaper product I would use until I bought something better. I was very surprised to see how nice it was! Very solid and non slip surface on the bottom. The wood on it looks great and one of the most awesome things about it is you can manually adjust it to fit your laptop. I have a heavy16 inch MacBook Pro with a case on it and it fits perfectly in this stand, after adjusting it, of course. I ended up buying another one for my work office too. I can’t wait to try other products from this company.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 29, 2026

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