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Finisar FCLF8520P2BTL 1000BASE-T, SGMII SFP 100m Cat5
10/100/1000 Mb/s 1000BASE-T, SGMII 10/100/1000, RX_LOS link indicator, no 1000BASE-X auto-neg SFP transceiver, up to 100m Cat5, industrial (−40 to 85 °c) temperature.
- Manufacturer
- Coherent Corp. (formerly Finisar / II-VI)
- Mfr part number
- FCLF8520P2BTL
- Family
- FCLF852xP2
- Category
- Fiber optic transceiver modules
- Datasheet
- FCLF8520P2BTL datasheet (PDF)
FCLF8520P2BTL specifications
| Attribute | Value |
|---|---|
| Manufacturer | Coherent Corp. (Finisar) |
| Manufacturer part number | FCLF8520P2BTL |
| Product family | FCLF852xP2 |
| Form factor | SFP (RJ-45) |
| Standards / application | IEEE 802.3 Gigabit Ethernet / 1000BASE-T |
| Data rate | 10/100/1000 Mb/s (up to 1.25 Gb/s) |
| Reach | 100 m on Category 5 UTP |
| Connector | RJ-45 |
| Supply voltage | 3.3 V (3.13–3.47 V) |
| Power dissipation | 1.2 W max (Is 320–375 mA) |
| Operating temperature | Industrial (−40 to 85 °C) |
| Diagnostics | No optical DDM; PHY IC accessible via 2-wire serial bus (address ACh); 128-byte EEPROM at A0h |
| Compliance | RoHS compliant per Directive 2011/65/EU |
| Lifecycle | Current production |
Optical and electrical values are from the Finisar / Coherent family datasheet; temperature grade is per part number. Confirm critical values with us before ordering.
About the Finisar FCLF8520P2BTL
The Finisar FCLF8520P2BTL (now a Coherent Corp. product, formerly II-VI) is a SFP (RJ-45) 1000BASE-T, SGMII 10/100/1000, RX_LOS link indicator, no 1000BASE-X auto-neg copper module for 10/100/1000 Mb/s links over Copper, with reach up to 100m Cat5. It is an industrial-temperature part rated −40 to 85 °C. It belongs to Finisar's FCLF852xP2 family, which has 3 orderable variants that differ by temperature grade, latch, receiver build or wavelength channel. Typical uses: Fast/Gigabit Ethernet, SONET/SDH OC-3/OC-12, campus and access links, and legacy network upgrades.
- Up to 1.25Gb/s bi-directional data links
- Hot-pluggable SFP footprint
- Extended case temperature range (-40°C to +85°C)
- Fully metallic enclosure for low EMI
- Compact RJ-45 connector assembly
- Access to physical layer IC via 2-wire serial bus
FCLF8520P2BTL: frequently asked questions
What is the Finisar FCLF8520P2BTL?
The FCLF8520P2BTL is a Finisar SFP (RJ-45) transceiver for 1000BASE-T, SGMII 10/100/1000, RX_LOS link indicator, no 1000BASE-X auto-neg at 10/100/1000 Mb/s. Finisar is now part of Coherent Corp. (formerly II-VI), and the part number is unchanged. It is used for Fast/Gigabit Ethernet, SONET/SDH OC-3/OC-12, campus and access links, and legacy network upgrades.
What is the maximum distance of the FCLF8520P2BTL?
The FCLF8520P2BTL is specified for up to 100m Cat5 over Copper. It is a copper module, so no optical power budget applies.
Which cable does the FCLF8520P2BTL use?
It is a copper module with an RJ-45 jack, so standard twisted-pair cabling plugs straight in.
Does the FCLF8520P2BTL support DDM / digital diagnostics?
No optical DDM; PHY IC accessible via 2-wire serial bus (address ACh); 128-byte EEPROM at A0h.
Will the FCLF8520P2BTL work in my Cisco, Juniper, Arista or HPE switch?
The FCLF8520P2BTL follows the SFP MSA, so it fits any matching port. It carries Finisar's own EEPROM programming; switches that check the module vendor may need a configuration setting or a vendor-branded optic. Send us your switch model and we confirm before dispatch.
FCLF8520P2BTL vs FCLF8521P2BTL: what is the difference?
Both are in Finisar's FCLF852xP2 family. They differ in build / application (1000BASE-T, SGMII 10/100/1000, RX_LOS link indicator, no 1000BASE-X auto-neg vs 1000BASE-T, 1000BASE-X auto-neg, no link indicator). Pick the variant that matches your temperature, latch and wavelength needs.
What temperature range is the FCLF8520P2BTL rated for?
The FCLF8520P2BTL is an industrial-temperature part rated −40 to 85 °C. Industrial grade suits outdoor cabinets, telecom huts and plant floors.
What does the FCLF8520P2BTL part number mean?
The FCLF prefix marks Finisar's copper SFP family. The I letter in the suffix usually marks the industrial temperature grade. The remaining characters identify the optical design and build variant.
Is your FCLF8520P2BTL genuine Finisar?
Yes. Next Gen Networks supplies original Finisar / Coherent modules, not third-party lookalikes or grey-market stock, and shares serial numbers on request.
What is the FCLF8520P2BTL price in India and how do I order?
The Finisar FCLF8520P2BTL price in India depends on quantity, delivery city and current stock. Next Gen Networks supplies it with a GST invoice (input tax credit ready) and pan-India dispatch from New Delhi. Send the part number, quantity and delivery city on WhatsApp +91-7827955775 or email Sales@nextgennetworks.in for a GST quote.
What power does the FCLF8520P2BTL need?
It runs from 3.3 V (3.13–3.47 V) with power dissipation of 1.2 W max (Is 320–375 mA).
Documents
NextGen datasheetPDF · specs, FAQ & buying guideManufacturer datasheet
Finisar / Coherent family datasheet
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