1.25G SFP 200km SMF Transceiver: 1.25G-SFP-200D
1.25G SFP 200km SMF Transceiver Overview
Our 1.25G SFP 200km transceiver extends maximum-reach gigabit connectivity for ultra-long-haul applications. Supporting 200km transmission over single-mode fiber at 1550nm wavelength, this module delivers a 40 dB link budget with speeds from 100Mbps to 1.25Gbps. LC/UPC connectors enable deployment in demanding carrier backbone networks.
- Media Type: Single-Mode Fiber (SMF)
- Fiber Count: Duplex
- Connector: Double LC/UPC
- Maximum Distance: 200 km
- Average Link Budget: 40 dB
- Tx Wavelength: 1550 nm
- Supported Data Rate: 0.1 Gbps - 1.25 Gbps
- DDM/DOM: Supported
- Temperature Range: Standard 0°-70°C
1.25G SFP 160km Pricing
SKU:1.25G-SFP-200D-MS1.25G-SFP-200D-MS
Made to Order - 2 WeeksMade to Order - 2 Weeks1.25G SFP 200km SMF Transceiver Specification
Form Factor | SFP |
Media Type | Single-Mode Fiber (SMF) |
Fiber Count | Duplex |
Connector | Double LC/UPC |
Maximum Distance | 200 km |
Average Link Budget | 40 dB |
TX Wavelength | 1550 nm |
RX Wavelength | 1550 nm |
Supported Data Rate | 0.1 Gbps - 1.25 Gbps |
Supported Ethernet Applications | Gigabit Ethernet (1.25 Gbps), 100M Ethernet (100Mbps) |
Supported Fiber Channel Applications | 1G Fiber Channel (1.0625 Gbps) |
DDM/DOM | Supported |
Tx Wavelength Bandwidth | 37 nm (1528-1565 nm) |
Rx Wavelength Bandwidth | 37 nm (1528-1565 nm) |
Minimum Transmitting Power | -2 dBm |
Maximum Transmitting Power | 5 dBm |
Receiver Sensitivity | -35 dBm |
Receiver Overload | -7 dBm |
Dispersion | 3800-4300 ps/nm ps/nm |
Transmitter Type | DFB Laser |
Receiver Type | APD Photodiode |
Temperature Range | Standard 0°-70°C |
Power | +3.3V single power supply |
Compliance | CE, Class 1 FDA and IEC60825-1 Laser Safety Compliant, INF-8074i, RoHS, SFP MSA |
1.25G SFP 200km SMF Transceiver Datasheet
v5Complete technical specifications and product details
1.25G SFP 200km SMF Transceiver Description
The EdgeOptic 1.25G-SFP-200D is a single-mode SFP transceiver built for Gigabit Ethernet, 100M Ethernet, and 1G Fiber Channel over a duplex LC/UPC fiber pair. It operates at 1550 nm with a 37 nm wavelength window, 1528 to 1565 nm, pairing a DFB laser transmitter with an APD photodiode receiver to reach the -35 dBm receiver sensitivity and 40 dB average link budget this reach class calls for. Supported data rate spans 0.1 to 1.25 Gbps, covering 100M Ethernet, Gigabit Ethernet, and 1G Fiber Channel at 1.0625 Gbps on the same module. Minimum transmit power is -2 dBm and maximum is 5 dBm, with a -7 dBm receiver overload ceiling and 3800 to 4300 ps/nm of supported chromatic dispersion. The 200 km maximum distance is a nominal figure derived from the link budget against standard single-mode fiber attenuation. Actual reach on a given route depends on splice loss, connector loss, and fiber condition, so confirm the real-world loss budget against the deployed fiber plant before committing to a 200 km span. Digital diagnostic monitoring is supported, reporting Tx and Rx power, bias current, temperature, and supply voltage for ongoing link health checks.
Gigabit Ethernet operation follows the IEEE 802.3z base standard. The module also supports 1G Fiber Channel at 1.0625 Gbps and 100M Ethernet on the same duplex LC/UPC fiber pair. It runs on a single +3.3V supply across a standard 0 to 70°C temperature range. Compliance covers CE, Class 1 laser safety under FDA and IEC 60825-1, INF-8074i, RoHS, and the SFP MSA, so the module presents MSA-compliant EEPROM identification per the SFP MSA and INF-8074i specification. This long-haul reach class suits regional backbone links, carrier core interconnects, and metro-to-core aggregation where a single 1550 nm fiber pair needs to cover distances beyond typical short-haul optics. Made to order. For volume pricing or deployment guidance, contact our sales team.
Frequently Asked Questions
Is the 1.25G-SFP-200D a 1000BASE-ZX or 1000BASE-EZX module?
1.25G-SFP-200D is not an IEEE-defined 1000BASE-ZX or 1000BASE-EZX module, since IEEE 802.3z does not define either designation as a standard reach class. ZX and EZX are de facto industry naming conventions rather than IEEE physical layer standards, generally used to describe the roughly 80 km and 120 to 200 km reach tiers. The 1.25G-SFP-200D's own rated figures, a 200 km maximum distance and 40 dB average link budget, place it in the extended long-haul tier the market commonly labels EZX.
Why does the 1.25G-SFP-200D use a 1550 nm DFB laser with an APD receiver?
1550 nm is the long-haul wavelength window for single-mode fiber, with lower attenuation than the 1310 nm window, which matters directly at a 200 km nominal distance. The DFB laser supplies the -2 to 5 dBm transmit power and narrow spectral width needed to manage dispersion over that distance, within the module's supported 3800 to 4300 ps/nm dispersion range. The APD receiver delivers the -35 dBm receiver sensitivity the 40 dB link budget calls for, beyond what a standard PIN photodiode resolves at this reach class.
How far can the 1.25G-SFP-200D actually reach on real fiber?
200 km is the nominal maximum distance calculated from the module's 40 dB average link budget against standard single-mode fiber attenuation. Actual achievable reach on any given route depends on the real fiber's attenuation per km, splice and connector loss, and any in-line components, so the full 200 km figure will not hold on every fiber plant. Verify the end-to-end loss budget for the specific route, including connector and splice loss, against the available 40 dB budget before planning a link at or near the maximum distance.
Does the 1.25G-SFP-200D support 100 Mbps as well as Gigabit Ethernet?
Yes. The supported data rate range is 0.1 to 1.25 Gbps, and the supported Ethernet applications cover both 100M Ethernet and Gigabit Ethernet at 1.25 Gbps on the same module. It also supports 1G Fiber Channel at 1.0625 Gbps, so the same SFP can serve 100M Ethernet, Gigabit Ethernet, or 1G Fiber Channel links depending on how the host port is configured.