Cudy
Cudy Single Mode 1.25G LC Bi-Directional SFP 20km
SKU: SM100GSB-20AB
Why We Chose This
We selected the Cudy CD-SFP-SMB because it offers a practical and affordable solution for single-mode fibre deployments. Its bi-directional design halves fibre usage while maintaining 1.25G performance over 20km, making it ideal for budget-conscious network upgrades. The pair packaging and cross-vendor compatibility ensure easy integration.
Cudy CD-SFP-SMB bi-directional SFP modules: 1.25Gbps, 20km single-mode, LC connector. Sold as a pair for cost-effective duplex transmission on a single fibre.
Free delivery on orders over R3,000
Product Description
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.
Key Features
- Bi-directional technology: duplex transmission on a single fibre using two wavelengths (1310nm TX/1550nm RX or 1550nm TX/1310nm RX)
- 1.25 Gbps data rate over single-mode fibre up to 20km
- LC connector interface, SFP form factor
- Sold as a pair (one A unit and one B unit)
- Cross-vendor compatibility
Why You'll Love It
By using a single fibre instead of two, these modules cut your cabling costs in half while maintaining full duplex performance. Perfect for upgrading existing fibre infrastructure or building new cost-efficient networks.
📋 View full supplier specifications →
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
Frequently Asked Questions
Do I need to buy two separate modules?+
No, this product is sold as a pair: one A unit (1310nm TX/1550nm RX) and one B unit (1550nm TX/1310nm RX). You get both in the box.
Can I use these with any switch?+
Yes, they are designed for cross-vendor compatibility with standard SFP slots. Just ensure your switch supports 1.25G and the correct wavelengths.
What is the maximum distance?+
Up to 20km over single-mode fibre (OS1/OS2).
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