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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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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Victoria
Massapequa, US
★★★★★ 5
Super cute and soft!
Size: 3T, Color: Light Mauve
Daughter fits very well in this pink pullover sweater. It’s true to size very pleased with the make of the sweater, it’s made very well very soft, is medium thickness and is warm for my daughter to wear in NY’s cool fall weather and now winter with a coat of course. Also is not to thick where wearing a coat could be an issue. Great value for your money in the product you are getting it washes well and stains come out easily sometimes with a little help. Great buy must have!
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Reviewed in the United States on December 17, 2024
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Adam
Houston, US
★★★★★ 5
Good buy
Size: Small, Color: Bright Pink
Very nice quality! Pretty true to size.
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Reviewed in the United States on May 26, 2026
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ABENTON
San Leandro, US
★★★★★ 5
Extremely soft and warm!!
Size: 2T, Color: Bright Pink
This is a really nice thick toddler hoodie! I bought the dark pink in a size 2t for my 25 month old daughter. She weighs 28 pounds. It is a great fit and also has a little wiggle room. The hoodie is extremely soft and comfortable. Keeps her toasty warm. Holds up in the wash, no shrinking. Came packaged well, no funky smell, arrived on time. Overall a great purchase
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Reviewed in the United States on November 11, 2025
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tiny
Fort Morgan, US
★★★★★ 4
runs small
Size: XX-Large, Color: Black
This hoodie is cute, cozy, and apparently designed for a child who has never met a growth spurt. It runs really small, like “did I accidentally order doll clothes?” small. The fabric feels nice and soft though, and right out of the package it looked well made and sturd... no loose threads or sketchy seams. Just definitely size up unless you’re planning for a very snug, fashion-forward moment. I bought this hoodie specifically to add a vinyl decal, and for that purpose it worked great. The material took the vinyl nicely, pressed well, and didn’t scorch or warp, which is always a relief when you’re hovering over a heat press like a nervous parent. It also washes nicely and still looks good after laundering… though it did shrink a little, which did not help its already petite situation. the material is thick and nice weight. Pros: good quality fabric, soft and comfy, great surface for vinyl decals, washes well. Cons: runs very small, shrinks a bit after washing, value is average unless you size up. Overall, it’s a nice little hoodie that does the job—as long as you order with future growth (and laundry shrinkage) firmly in mind.
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Reviewed in the United States on December 30, 2025
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bonnie burgess
San Leandro, US
★★★★★ 5
Children's outerwear, a must have .. excellent quality, fit & price!
Size: X-Small, Color: White
One of the very best pull over sweatshirts I've come across. Quality fabric with an amazing cut & fit that rises above the standard, more boxy cut of children's sweatshirts I've purchased in the past. With an 8 year old granddaughter that's constantly on the go & is never cold lol, I needed a piece of outerwear that wasn't too thick, bulky or restrictive that she'd forget she was wearing. A piece of clothing that would keep her warm yet comfortable, thru out her day & boy did I hit the jackpot. All of the above plus an overall amazing fit & stylish look I wasn't expecting but could tell she absolutely loved. An added bonus, after at least 15 or more washes to-date, it still looks & fits as good as it did the very first time she wore it. I've since purchased other similar items but none compare. An excellent buy !!!!
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Reviewed in the United States on April 4, 2025

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