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Finisar FTLF3436W4BTxx 25GE LR SFP28 10km
25 Gb/s 25GE LR / eCPRI CWDM (rate select 25/24.33/10G) SFP28 transceiver, Channel-specific (see variants), up to 10km, industrial temperature.
- Manufacturer
- Coherent Corp. (formerly Finisar / II-VI)
- Mfr part number
- FTLF3436W4BTxx
- Family
- FTLF3436W4BTxx
- Category
- Fiber optic transceiver modules
- Datasheet
- FTLF3436W4BTxx datasheet (PDF)
FTLF3436W4BTxx specifications
| Attribute | Value |
|---|---|
| Manufacturer | Coherent Corp. (Finisar) |
| Manufacturer part number | FTLF3436W4BTxx |
| Product family | FTLF3436W4BTxx |
| Form factor | SFP28 |
| Standards / application | SFF-8472 Rev 12.2b; SFF-8432a; SFF-8431 Rev 3.0c |
| Data rate | Up to 25.78 Gb/s; 10.3/9.8 Gb/s supported |
| Wavelength | CWDM 1271 / 1291 / 1311 / 1331 nm |
| Laser | CWDM DFB |
| Receiver | PIN |
| Reach | Up to 10 km on 9/125 µm SMF |
| Connector | Duplex LC |
| Tx output power | −7.0 to +2.0 dBm @25.78G; −8.2 to +0.5 dBm @10.3G |
| Rx sensitivity | −11.3 dBm @25.78G; −12.6 dBm @10.3G; stressed −8.8 dBm OMA |
| Rx overload / max input | +2.2 dBm OMA |
| Extinction ratio | ≥ 3.5 dB |
| Supply voltage | 3.3 V (3.15–3.46 V) |
| Power dissipation | 1.5 W max with established link (433 mA) |
| Operating temperature | Industrial |
| Diagnostics | SFF-8472 digital diagnostics |
| Compliance | RoHS |
| 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.
FTLF3436W4BTxx: orderable variants (6)
| Part number | Details |
|---|---|
| FTLF3436W4BT27 | 1271 nm, gray bail |
| FTLF3436W4BT29 | 1291 nm, violet bail |
| FTLF3436W4BT31 | 1311 nm, blue bail |
| FTLF3436W4BT33 | 1331 nm, green bail |
| FTLF3436W4BT35 | Not listed in datasheet |
| FTLF3436W4BT37 | Not listed in datasheet |
Ask for any variant on WhatsApp +91-7827955775 or Sales@nextgennetworks.in – bulk pricing by quantity.
About the Finisar FTLF3436W4BTxx
The Finisar FTLF3436W4BTxx (now a Coherent Corp. product, formerly II-VI) is a SFP28 25GE LR / eCPRI CWDM (rate select 25/24.33/10G) optical transceiver for 25 Gb/s links at Channel-specific (see variants) over SMF, with reach up to 10km. It is an industrial-temperature part. The FTLF3436W4BTxx family name covers 6 orderable variants listed below. Typical uses: 25G Ethernet server and leaf links, 5G fronthaul (eCPRI) and 10G-to-25G upgrades.
- 25G RoHS Compliant CWDM SFP+ Transceiver
- Up to 25.78 Gb/s bi-directional data links
- Up to 10 km on 9/125μm SMF
- Built-in digital diagnostic functions
- 1.5W maximum power consumption with established link
- Metal enclosure, for lower EMI
FTLF3436W4BTxx: frequently asked questions
What is the Finisar FTLF3436W4BTxx?
The FTLF3436W4BTxx is a Finisar SFP28 transceiver for 25GE LR / eCPRI CWDM (rate select 25/24.33/10G) at 25 Gb/s. Finisar is now part of Coherent Corp. (formerly II-VI), and the part number is unchanged. It is used for 25G Ethernet server and leaf links, 5G fronthaul (eCPRI) and 10G-to-25G upgrades.
What does the 'x' in FTLF3436W4BTxx mean?
FTLF3436W4BTxx is Finisar's family / ordering name. The 'x' is replaced by a code to make the exact orderable part number. For this family the codes are: 27, 29, 31, 33, 35, 37. Two-digit numbers are ITU / CWDM wavelength channel codes. See the variants table and tell us which one you need, or share your switch and link details and we will pick the right one.
What is the optical power budget of the FTLF3436W4BTxx?
Per the Finisar family datasheet, the FTLF3436W4BTxx transmits −7.0 to +2.0 dBm @25.78G; −8.2 to +0.5 dBm @10.3G and has a receiver sensitivity of −11.3 dBm @25.78G; −12.6 dBm @10.3G; stressed −8.8 dBm OMA. Maximum receiver input is +2.2 dBm OMA.
Does the FTLF3436W4BTxx support DDM / digital diagnostics?
Yes. SFF-8472 digital diagnostics. Your switch can read live temperature, voltage, laser bias and Tx/Rx power.
Which part numbers are in the FTLF3436W4BTxx family?
Orderable variants include: FTLF3436W4BT27, FTLF3436W4BT29, FTLF3436W4BT31, FTLF3436W4BT33, FTLF3436W4BT35, FTLF3436W4BT37. Next Gen Networks supplies the exact variant you need in bulk with a GST invoice.
What is the maximum distance of the FTLF3436W4BTxx?
The FTLF3436W4BTxx is specified for up to 10km over SMF. Long-reach optics may need an attenuator on short links; we can advise based on your link loss.
Which fiber and connector does the FTLF3436W4BTxx use?
The FTLF3436W4BTxx works at Channel-specific (see variants) over SMF. Both ends of a link must use the same optical standard.
Will the FTLF3436W4BTxx work in my Cisco, Juniper, Arista or HPE switch?
The FTLF3436W4BTxx follows the SFP28 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.
What temperature range is the FTLF3436W4BTxx rated for?
The FTLF3436W4BTxx is an industrial-temperature part. Industrial grade suits outdoor cabinets, telecom huts and plant floors.
What does the FTLF3436W4BTxx part number mean?
The FTLF prefix marks Finisar's SFP / SFP28 / SFP56 family (incl. Fibre Channel). The I letter in the suffix usually marks the industrial temperature grade. The remaining characters identify the optical design and build variant.
Is your FTLF3436W4BTxx 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 FTLF3436W4BTxx price in India and how do I order?
The Finisar FTLF3436W4BTxx 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 FTLF3436W4BTxx need?
It runs from 3.3 V (3.15–3.46 V) with power dissipation of 1.5 W max with established link (433 mA).
Documents
NextGen datasheetPDF · specs, FAQ & buying guideDownload datasheet
Finisar_FTLF3436W4BTxx_Datasheet_NextGenNetworks.pdfManufacturer datasheet
Finisar / Coherent family datasheet
Related Finisar parts
FTLF3436W4BT2725GE LR / eCPRI CWDM, 10kmFTLF3436W4BT2925GE LR / eCPRI CWDM, 10kmFTLF3436W4BT3125GE LR / eCPRI CWDM, 10kmFTLF3436W4BT3325GE LR / eCPRI CWDM, 10kmFTLF3436W4BT3525GE LR / eCPRI CWDM, 10kmFTLF3436W4BT3725GE LR / eCPRI CWDM, 10kmGovernment, PSU and enterprise orders welcome. GST invoice and pan-India delivery.
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